Important Information

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1

D

Important Information

Section 1D - Outboard Motor Installation

Notice to Installer...1D-2 350 Verado SCi (L and CL Models) Anti‑Turn Fastener ...1D-2 Avoiding Loss of Throttle and Shift Control...1D-3 Accessory Electric Fuel Pump/Fuel Line Primer Bulb...1D-3 Avoiding Fuel Flow Restriction...1D-3 Boat Horsepower Capacity...1D-3 Selecting Accessories for Your Outboard...1D-3 Fuel Tanks...1D-4 Portable Fuel Tank...1D-4 Permanent Fuel Tank...1D-4 Filling the Fuel System...1D-4 Installing Outboard...1D-4 Installation Specifications...1D-4 Maximum Outboard Mounting Height...1D-5 Drilling Outboard Mounting Holes...1D-6 Checking Boat Transom Construction...1D-6 Lifting Outboard...1D-7 Determining Recommended Outboard Mounting Height ...1D-9 Fastening the Outboard to the Transom...1D-10 Fuel Hose Connection...1D-11 Low Permeation Fuel Hose Requirement ...1D-11 Vessel‑Mounted Water Separating Fuel Filter Installation ...1D-11 Wiring and Installation...1D-13 Routing Connections Through the Cowl...1D-13 Wire Color Code Abbreviations...1D-14 Installation Guidelines for DTS System Components ...1D-14

DTS Wiring Guidelines...1D-14 Data Harness Pulling Procedure...1D-15 Data Harness Connection to the Engine...1D-15 Junction Box (if Equipped)...1D-15 Wiring Instructions for Non‑Mercury Marine Ignition Key Switch...1D-16 Wiring Accessories...1D-16 System Wiring Reference Points...1D-17 Battery Cable Size for Outboard DTS Models...1D-17 Battery Cable Connections to the Engine...1D-18 Verado Engine Battery Specifications...1D-19 Connecting Battery Cables and DTS Power Harness ...1D-20 Connecting Existing Fuel Tank Connection to 350 Verado SCi Vessel Harness...1D-21 Switched 12 V Accessory Connection...1D-23 DTS Single Engine with Panel Control ‑ Single Helm ...1D-24 DTS Single Engine with Console Control ‑ Single Helm ...1D-26 DTS Single Engine with Slim Binnacle Console Control ‑ Single Helm...1D-28 DTS Dual Engine with Console Control ‑ Single Helm ...1D-30 DTS Triple Engine with Shadow Mode Control ‑ Single Helm...1D-32 System Wiring Installation Checklist...1D-33 Propeller Installation ...1D-34

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Lubricants, Sealants, Adhesives

Tube Ref No. Description Where Used Part No.

9 Loctite 567 PST Pipe

Sealant Threads of brass hose fittings and plug 92-809822

25 _{Liquid Neoprene} _{Seal battery cable connections} _{92- 25711 3}

94 _{Anti-Corrosion Grease} _{Propeller shaft splines} _{92-802867Q 1}

95 2-4-C with Teflon Propeller shaft splines 92-802859A 1

Special Tools

Transom Drilling Fixture 91‑ 98234A 2

5489

Aids in engine installation by acting as a template for engine mounting holes.

Mercury Racing Flywheel Puller/Lifting Ring 91‑895343T03

35340

Removes flywheel from engine and is required for lifting a 350 Verado SCi powerhead/engine

Data Cable Puller 888462A 1

4618

Attaches to end of DTS data harness to aid in pulling harness through boat. Prevents damage to DTS data harness.

Notice to Installer

This Product Requires Electronic Calibration Before Use.

Installation of this product will require electronic calibration. This calibration must not be attempted by anyone other than the original equipment manufacturer (OEM) or a Mercury technician trained in digital throttle and shift (DTS) systems at an authorized Mercury dealership. Improper installation and calibration of the DTS product will result in a system which is inoperable or unsafe for use.

350 Verado SCi (L and CL Models) Anti‑Turn Fastener

!

CAUTION

Remove the antiturn fastener that is securing the trim manifold to the pedestal prior to steering or rotating the engine. Failure to do so will result in engine damage.

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NOTE: This procedure only applies to long (L) and counter long (CL) models of the 350 Verado SCi engine.

a - Anti‑turn fastener (bolt)

Avoiding Loss of Throttle and Shift Control

!

WARNING

Splicing or probing will damage the wire insulation allowing water to enter the wiring. Water intrusion may lead to wiring failure and loss of throttle and shift control. To avoid the possibility of serious injury or death from loss of boat control, do not splice or probe into any wire insulation of the DTS system.

Accessory Electric Fuel Pump/Fuel Line Primer Bulb

IMPORTANT: Do not install an accessory electric fuel pump or a fuel line primer bulb into the fuel system of this engine.

Avoiding Fuel Flow Restriction

IMPORTANT: Adding components to the fuel supply system (filters, valves, fittings, etc.) may restrict the fuel flow. This may cause engine stalling at low speed, and/or a lean fuel condition at high RPM that could cause engine damage.

Boat Horsepower Capacity

!

WARNING

Exceeding the boat's maximum horsepower rating can cause serious injury or death. Overpowering the boat can affect boat control and flotation characteristics or break the transom. Do not install an engine that exceeds the boat's maximum power rating.

Do not overpower or overload your boat. Most boats will carry a required capacity plate indicating the maximum acceptable power and load as determined by the manufacturer following certain federal guidelines. If in doubt, contact your dealer or the boat manufacturer.

U.S. COAST GUARD CAP ACITY

MAXIMUM HORSEPOWER XXX

MAXIMUM PERSON

CAPACITY (POUNDS)

XXX

MAXIMUM WEIGHT

CAPACITY

XXX

26777

Selecting Accessories for Your Outboard

Genuine Mercury Precision or Quicksilver Accessories have been specifically designed and tested for this outboard.

Some accessories not manufactured or sold by Mercury Marine are not designed to be safely used with this outboard or outboard operating system. Acquire and read the installation, operation, and maintenance manuals for all selected accessories.

a

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Fuel Tanks

Portable Fuel Tank

Select a suitable location in the boat within the engine fuel line length limitations and secure the tank in place.

Permanent Fuel Tank

Permanent fuel tanks should be installed in accordance with industry and federal safety standards, which include recommendations applicable to grounding, anti‑siphon protection, ventilation, etc.

Filling the Fuel System

!

WARNING

Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot start. Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated and avoid prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any spilled fuel immediately.

For initial start of a new engine, or for an engine that ran out of fuel or was drained of fuel, the fuel system should be primed before attempting to start the engine.

1. Ensure the fuel tank valve is open (if applicable).

2. Turn the ignition key switch to the "ON" position for approximately one minute. This operates the fuel lift pump.

3. Turn the ignition key switch back to the "OFF" position and then return the ignition key switch to the "ON" position again for an additional minute.

4. Turn the ignition key switch back to the "OFF" position. The filling of the fuel system is complete.

!

WARNING

Fuel leakage is a fire or explosion hazard, which can cause serious injury or death. Periodically inspect all fuel system components for leaks, softening, hardening, swelling, or corrosion, particularly after storage. Any sign of leakage or deterioration requires replacement before further engine operation.

5. Start the engine and check for leaks. If the engine is difficult to start or runs rough, check that the drain, bowl, filter, and ports are securely tightened. Check all connections for security and hoses to ensure there are no kinks or sharp bends that would create excessive restrictions.

Installing Outboard

Installation Specifications

NOTICE

Care must be taken to prevent water from entering the cowl. Mounting height and location will affect how water is deflected between engines (multiple applications) and between the engine and transom under hard acceleration or deceleration forces. The installing dealer or boat builder is responsible for proper installation of the engine as explained in the installation instructions for the product. Engine damage resulting from water ingestion is not covered by the product warranty, unless the damage is the result of a defective part supplied by the engine manufacturer.

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IMPORTANT: The 350 Verado SCi has a front air scoop designed into the top cowl. Do not install the 350 Verado SCi in applications that may enable water to become ingested into the top cowl front air scoop. Care must be taken when installing onto vessels with a notched transom or on a bracket that mounts the engine away from the transom. Water ingestion is more likely to occur in these types of applications. The use of a shield may be required to prevent the water from entering the cowl.

a - Minimum transom opening

b - Engine centerline for dual engine ‑ 66.0 cm (26 in.) Minimum Transom Opening

Single engine 99.0 cm (39 in.)

Dual engine 165.0 cm (65 in.)

Maximum Outboard Mounting Height

The mounting height of the outboard must not exceed 63.5 cm (25 in.) for L models, 76.2 cm (30 in.) for XL models, and 88.9 cm (35 in.) for XXL models. Mounting the outboard higher may cause damage to the gearcase components.

28929

Maximum Static Waterline

The static waterline, with boat at rest, must be below the "MAX STATIC WATERLINE" mark on the idle relief grommet (located at the rear of the outboard) when the outboard is fully tilted in/down. If waterline is above "MAX STATIC WATERLINE" mark, adjust boat load forward or increase (raise) outboard mounting height to correctly place mark above waterline.

MAX STATIC WATERLINE 4224

a

b

a

4241

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Drilling Outboard Mounting Holes

IMPORTANT: Before drilling any mounting holes, carefully read Determining Recommended Outboard Mounting Height. There is a 19 mm (0.75 in.) difference between the outboard mounting holes in the transom brackets.

!

WARNING

Improper installation of an outboard can result in serious injury or death. Do not allow the upper outboard mounting bolts to be closer than 25 mm (1 in.) from the top of the boat transom, not including any shims used to increase transom mouting height. Never install the upper mounting bolts through these shims.

1. Mark four mounting holes on the transom using the transom drilling fixture.

a - Drill guide holes

b - Transom drilling fixture ‑ not included

c - Transom centerline

Transom Drilling Fixture 91‑ 98234A 2

2. Place masking tape directly onto the boat where the mounting holes will be drilled to help keep the fiberglass from chipping.

3973

3. Using the drill guide holes on the transom drilling fixture, drill four 13 mm (17/32 in.) holes perpendicular to and through the transom.

Checking Boat Transom Construction

IMPORTANT: Determine the strength of the boat transom. The outboard mounting locknuts and bolts should be able to hold 75 Nm (55 lb‑ft) of torque without the boat transom yielding or cracking. If the boat transom yields or cracks under this torque, the construction of the transom may not be adequate. The boat transom must be strengthened or the load carrying area increased.

a - Transom yielding under bolt torque

b - Transom cracking under bolt torque

2757

a

b

c

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b

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When first determining transom strength, use a dial torque wrench. If the bolt or nut continues to turn without the torque reading on the dial increasing, it is an indication that the transom is yielding. The load area can be increased by using a larger transom washer or a transom reinforcement plate.

NOTE: The inside holes on the transom reinforcement plate are for the lower transom bolts and the outside holes are for the upper transom bolts.

a - Large transom washer

b - Transom reinforcement plate

Description Part Number

Large transom washer 67‑896392

Transom reinforcement plate 67‑896305001

Lifting Outboard

1. Remove top cowl and engine flywheel cover.

2. Install lifting ring/flywheel puller to flywheel. Tighten bolts securely.

IMPORTANT: When lifting the 350 Verado SCi, it is required to use the Mercury Racing flywheel puller/lifting ring tool. Damage to the engine or flywheel fan may occur if the Mercury Racing flywheel puller/lifting ring tool is not used to lift the engine. 3. Lift engine using engine lift with a minimum capacity of 450 kg (1000 lb).

4. Avoid interference by placing the lower mounting bolts into the lower mounting slots before placing outboard against the transom.

a

b

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5. Refer to Determining Recommended Outboard Mounting Height and install the outboard to the nearest recommended mounting height.

a - Mercury Racing flywheel puller/ lifting ring

b - Transom mounting bolts

Mercury Racing Flywheel Puller/Lifting Ring 91‑895343T03

6. Fasten the outboard with the mounting hardware provided. Refer to Fastening the Outboard to the Transom.

38761

a

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Determining Recommended Outboard Mounting Height

Add 12.7 cm (5 in.) for XL models and 25.4 cm (10 in.) for XXL models to listed outboard mounting height.

a - The solid line is recommended to determine the outboard mounting height

b - The broken lines represent the extremes of known successful outboard mounting height dimensions

c - The line may be preferred to determine outboard mounting height dimension, if maximum speed is the only objective

d - The line may be preferred to determine outboard mounting height dimension for dual outboard installation

e - Outboard mounting height (height from a point on the pedestal 48 mm [1‑7/8 in.] above center of top mounting hole to the bottom of the boat transom). For heights over 56.0 cm (22 in.), a propeller designed for surfacing operation is usually preferred.

f - Maximum boat speed (mph) anticipated

NOTICE

• The static waterline, with boat at rest, must be below the "MAX STATIC WATERLINE" mark on the idle relief grommet (located at the rear of the outboard), when the outboard is fully tilted in/down. If waterline is above "MAX STATIC WATERLINE" mark, adjust boat load forward or increase (raise) outboard mounting height to correctly place mark above waterline.

• The mounting height of the outboard must not exceed 63.5 cm (25 in.) for L models, 76.2 cm (30 in.) for XL models, and 88.9 cm (35 in.) for XXL models. Mounting the outboard higher may cause damage to the gearcase components. Increasing the mounting height will usually:

• Increase top speed • Increase boat stability

• Cause propeller to break loose during planing or turning (20 in.) (21 in.) (22 in.) (23 in.) (24 in.) (25 in.) (26 in.) (19 in.) 10 20 30 40 50 60 70 80 66.0 cm 63.5 cm 60.9 cm 58.4 cm 56.0 cm 53.3 cm 50.8 cm 48.2 cm

a

c

d

b

f

e

29215

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Fastening the Outboard to the Transom

Mounting Bolts

Outboard Transom Mounting Hardware ‑ Supplied with Outboard

Part Number Part Name Description

10‑67755‑1 Outboard mounting bolt ½‑20 x 4.50 in. long (2.25 in. thread)

11‑826711‑17 Nylon insert locknut ½‑20

12‑28421 Flat washer 1‑1/2 in. diameter

12‑54012 Flat washer 7/8 in. diameter

Available Outboard Mounting Bolts

Part Number Description

10‑67755005 ½‑20 x 2.50 in. long (1.25 in. thread)

10‑67755‑1 ½‑20 x 4.50 in. long (2.25 in. thread)

10‑8M0033366 ½‑20 x 5.00 in. long (3.25 in. thread)

Checking Boat Transom Construction

IMPORTANT: Determine the strength of the boat transom. The outboard mounting locknuts and bolts should be able to hold 75 Nm (55 lb‑ft) of torque without the boat transom yielding or cracking. If the boat transom yields or cracks under this torque, the construction of the transom may not be adequate. The boat transom must be strengthened or the load carrying area increased.

a - Transom yielding under bolt torque

b - Transom cracking under bolt torque

Use a dial torque wrench to determine transom strength. If the bolt or nut continues to turn without the torque reading on the dial increasing, it is an indication that the transom is yielding. The load area can be increased by using a larger washer or a transom reinforcement plate.

a - Large transom washer

b - Transom reinforcement plate

1. Apply marine sealer to the shanks of the bolts, not to the threads.

2. Fasten the outboard with the correct mounting hardware. Tighten the locknuts to the specified torque.

IMPORTANT: Ensure a minimum of two full threads of the mounting bolts extend beyond the locknut after tightening. The locknut must be drawn tight while still engaging the bolt threads and not contacting the shank of the bolt.

18961

a

b

a

b

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NOTE: For more accurate torque, tighten the mounting locknuts rather than the outboard mounting bolts.

a - 1/2 in. diameter outboard mounting bolt (4)

b - 7/8 in. flat washer (4)

c - Nylon insert locknut (4)

d - 1‑1/2 in. flat washer (4)

e - Marine sealer ‑ apply to the shank of the bolts, not the threads

Description Nm lb‑in. lb‑ft

Outboard mounting locknuts and bolts ‑ standard boat transom 75 55

Outboard mounting locknuts and bolts ‑ metal lift plates and setback brackets 122 90

Fuel Hose Connection

Fuel Hose Size

IMPORTANT: Fuel line inside diameter (I.D.) must be 10 mm (3/8 in.) with separate fuel line/fuel tank pickup for each engine. Fasten remote fuel hose to fitting with hose clamp.

a - Remote fuel hose

b - Hose clamp

Low Permeation Fuel Hose Requirement

Required for outboards manufactured for sale, sold, or offered for sale in the United States.

• The Environmental Protection Agency (EPA) requires that any outboard manufactured after January 1, 2009 must use low permeation fuel hose for the primary fuel hose connecting the fuel tank to the outboard.

• Low permeation hose is USCG Type B1‑15 or Type A1‑15, defined as not exceeding 15/gm²/24 h with CE 10 fuel at 23 °C as specified in SAE J 1527 ‑ marine fuel hose.

Vessel‑Mounted Water Separating Fuel Filter Installation

!

WARNING

Fuel is flammable and explosive. Ensure that the key switch is off and the lanyard is positioned so that the engine cannot start. Do not smoke or allow sources of spark or open flame in the area while servicing. Keep the work area well ventilated and avoid prolonged exposure to vapors. Always check for leaks before attempting to start the engine, and wipe up any spilled fuel immediately.

a

c

d

c

a

d

40952

b

e

a

b

3730 F E

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IMPORTANT: Do not mount the filter in direct sunlight.

NOTE: Install the filter into the fuel line between the fuel tank and the engine.

a - Fuel filter assembly

b - Filter O‑ring

c - Separator head

d - O‑ring

e - Water sensor

f - Water sensor harness connection

g - Drain valve

1. Drill two 1.0 cm (3/8 in.) holes 5.1 cm (2.0 in.) on center.

IMPORTANT: Mount the fuel filter in a vertical position that provides adequate support and access for removal and installation of the filter canister.

a - Fuel inlet

b - Fuel outlet

c - Drill pattern

2. Remove and discard the plastic cap plugs from the fuel inlet and outlet holes of the fuel filter separator head.

!

WARNING

Improper installation of brass fittings or plugs into the fuel pump or fuel filter base can crack the casting, causing a fuel leak and possible fire or explosion. Always install fittings and plugs correctly, and do not tighten with power tools.

IMPORTANT: It is recommended that straight fuel hose fittings be installed into the fuel filter assembly to minimize fuel flow restrictions.

IMPORTANT: The inside diameter of the brass hose fittings must not be smaller than the inside diameter of the fuel line.

35697

a

e

f

g

d

b

c

5.1 cm

(2.0 in.)

a

b

37205

b

c

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3. Coat the threads of two brass 1/4‑18 hose fittings (obtained locally) and the threads of a plug, to be inserted into the unused port, with Loctite 567 PST Pipe Sealant.

IMPORTANT: Do not use Teflon tape as a thread sealant.

9 Loctite 567 PST Pipe

Sealant Threads of brass hose fittings and plug 92-809822

4. To prevent cracking the casting and causing fuel leaks, turn the fittings in by hand until finger‑tight, then tighten 1‑3/4 to 2‑1/4 turns with a wrench.

5. Place a drain pan under the fuel filter to catch any spilled fuel. Cut the fuel line at a point centered between the hose fittings. 6. Slip a hose clamp (obtained locally) over each fuel line.

7. Install the fuel line from the fuel tank onto the inlet hose fitting and the fuel line from the engine onto the outlet hose fitting. Secure the fuel lines to the fittings with the hose clamps.

8. Ensure that the fuel line is installed free of stress; no sharp bends and firmly secured to prevent chafing from vibration. 9. Attach the drain hose to the drain valve (if applicable).

!

WARNING

Fuel leakage is a fire or explosion hazard, which can cause serious injury or death. Periodically inspect all fuel system components for leaks, softening, hardening, swelling, or corrosion, particularly after storage. Any sign of leakage or deterioration requires replacement before further engine operation.

10. Connect the water in fuel (WIF) sensor harness connection to the bowl.

11. Prime the fuel system. Visually inspect for fuel leakage from the filter while turning the ignition key to the run position, forcing fuel into the filter. Refer to Filling the Fuel System.

Wiring and Installation

Routing Connections Through the Cowl

IMPORTANT: Ensure that the wiring harness and battery cables, routed between the cowl fitting and the engine attachment point, have slack at both ends to relieve stress and prevent hoses/cables from being kinked or pinched. Ensure that all hoses and cables do not bind or become tight when the engine is positioned in full left and right turns and full tilt position.

NOTE: Mercury Marine suggests routing the wiring, cables, and fuel hose through a rigging hose or flexible sleeve from the engine to the boat's gunnel or motor well. Follow the installation instructions included with the rigging hose or flexible sleeve kit.

350 Verado SCi Engine

IMPORTANT: Paddle wheel or pitot speed/sea temperature sensors are not supported by the 350 Verado SCi engine. The 350 Verado SCi engine does not have separate harness connections to the vessel sensors and power steering. These individual connections are incorporated into a single vessel harness. The 350 Verado SCi vessel harness connects the engine to the external fuel/water separator, power steering pump, and fuel level sensors.

Procedure

1. Pull out the grommet fitting and rubber grommet from the front cowl opening. Route the wiring harnesses, battery cables, and fuel hose through the correct openings in the rubber grommet as shown.

a - Grommet fitting

b - Rubber grommet

c - Battery cables

d - Data harness

e - Fuel hose

f - DTS power harness, vessel sensor harness, power steering pump harness, 350 Verado SCi vessel harness

2. Insert the rubber grommet into the grommet fitting and secure the grommet fitting into the front cowl opening.

F H B E

a

b

c

d

e

f

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Wire Color Code Abbreviations

Wire Color Abbreviations

BLK Black

BLU Blue

BRN Brown GRY Gray

GRN Green ORN or ORG Orange

PNK Pink PPL or PUR Purple

RED Red TAN Tan

WHT White YEL Yellow

LT or LIT Light DK or DRK Dark

Installation Guidelines for DTS System Components

!

WARNING

Data Harness

!

WARNING

Prevent serious injury or death from a loss of boat control. Pulling on or flexing connectors can loosen terminals and cause open or intermittent electrical connections, which will interrupt control of throttle and shifting. Do not pull on cable connectors when pulling cables through the boat. Do not allow cables to flex at connection points. Fasten all electrical harnesses within 25 cm (10 in.) of any connection.

Connectors

IMPORTANT: Connectors should never have to be forced into the receptacle. Ensure that connectors are free of any lubricant or dielectric grease before installation. When the connector is properly aligned, it will only take a small amount of pressure to insert it into the receptacle. Rotate the locking collar to secure the electrical connection.

NOTE: Connect only one data harness of the required length between the engine and helm. If a data harness is too short, do not connect multiple harnesses together to make up the required length. For installations requiring a data harness length longer than 12.2 m (40 ft.), contact Mercury Marine for more information.

DTS Wiring Guidelines

!

WARNING

• Never attempt to connect, network, tie into, switch, and/or sink source voltage or current from the DTS wiring harnesses. • Never attempt to connect any type of communication or navigation equipment into the DTS wiring harnessing other than at

the designated connection point.

• Boat accessory equipment being installed must be connected to an appropriate power source such as a fuse panel or junction box.

• Never attempt to tap directly into any of the DTS electrical wiring harnesses for a source of power.

Wiring Guidelines for Electrical Boat Accessories

!

WARNING

Excessive voltage drop may compromise the DTS system, leading to serious injury or death from loss of throttle and shift control. Do not wire any electrical accessory into the 12‑volt ignition key switch circuits of the DTS system.

IMPORTANT: Do not connect boat accessories to 12 volt or ignition key switch DTS circuits. Use a separate switched 12 volt source for wiring boat accessories.

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The DTS system requires a consistent 12 volt power source. Splicing or connecting accessories to the 12 volt or ignition key switch DTS circuits (purple, purple/white, or red wires) could blow a fuse or overload circuits, causing intermittent or complete loss of operation.

Harness Installation Guidelines

• Locate a routing path for the harness connections so they reach their installation points.

• Inspect the routing path to ensure surfaces are free of any sharp edges or burrs that could cut the harness.

• Fasten and support the harness with clamps or cable ties along the routing path. A clamp or cable tie must be used within 25.4 cm (10 in.) of any connection in a DTS system.

• Ensure all connections are tight and seal all unused connectors with weather caps.

Data Harness Pulling Procedure

IMPORTANT: Do not route data harness near engine ignition components (coils, spark plug leads, and spark plugs), high power VHF coax, or radios. An electrical field generated from these components could cause interference with data transmission. IMPORTANT: Do not route data harness near sharp edges, hot surfaces, or moving parts. Fasten cables away from any sharp edges, fasteners, or objects that could wear into the harness.

IMPORTANT: Avoid sharp bends in the data harness. Minimum bend radius should be 7.6 cm (3 in.) for the final wiring installation. 1. Inspect the routing path to ensure surfaces are free of any sharp edges or burrs that could cut the harness.

2. Install cable pulling tool to data harness. 3. Secure pulling tool with two cable ties.

IMPORTANT: The cable ties must be tight to prevent any slipping during installation.

3836

Data Cable Puller 888462A 1

IMPORTANT: Carefully inspect data harness pins to ensure all pins are securely fastened to data harness connector end following installation.

NOTE: Data harness should be secured with mounting clips or cable ties along the routing path.

Data Harness Connection to the Engine

Route the data harness through the front cowl opening. Connect the data harness to the 14 pin connector. Inspect the data harness routing to ensure the avoidance of tension/abrasion against engine components.

a - 14 pin connector

b - Data harness

Junction Box (if Equipped)

• Although the junction box connections are watertight, it is recommended the junction box be mounted in an area that stays relatively dry.

• Mount in an area where the wiring connection will not get stepped on or disturbed. • Mount in an area that is accessible for troubleshooting and servicing the system. • Ensure the DTS command module harness will reach all the connection points.

a

b

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• Fasten all junction box connections within 25.4 cm (10 in.) of the junction box. • Seal all unused connections with weather caps.

a - Clamp

b - Weather cap (859318T 2)

c - Junction box

d - 25.4 cm (10 in.)

e - DTS command module harness

Wiring Instructions for Non‑Mercury Marine Ignition Key Switch

!

CAUTION

Ignition switches not sold by Mercury Marine can exceed acceptable current flow and voltage drop specifications, causing the engine to start unexpectedly. Only install switches sold through Mercury Marine.

IMPORTANT: We recommend only the use of Mercury Marine brand SmartCraft and DTS accessories. Mercury Marine designs and manufactures these accessories specifically for use on our SmartCraft or DTS systems, with each of these accessories passing through an extensive product qualification process. It is impossible to test our systems with all accessories manufactured and sold by other entities. If a boatbuilder or dealer chooses to disregard this recommendation, any non‑Mercury Marine components connected to a SmartCraft or DTS system must adhere to all specifications provided. Documentation exhibiting compliance with these specifications must be submitted and approved by Mercury Marine before releasing the finished product for sale. Damage caused by the use of accessories or parts not manufactured or sold by Mercury Marine is not covered under warranty.

• The ignition key switch must comply with Mercury specifications for key switches and controller input switches (897741‑S or 897791‑S). Switches that do not meet these specifications could leak current.

• Switches must contain an emergency stop circuit.

a - Connector ‑ Packard Metripack 150 Series sealed (6 pin)

b - Ignition key switch

c - Crank d - +12 volts e - Lanyard stop f - Ground g - Run h - Accessory

Wiring Accessories

NOTE: Refer to Mercury Precision Parts Accessories Guide.

a

b

c

d

e

29220 B L K / Y E L B L K P P L Y E L / R E D R E D P P L / WHT PPL/WHT BLK RED YEL/RED BLK/YEL PPL

c

d

e

f

g

h

3641

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b

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System Wiring Reference Points

Features

• Digital throttle and shift (DTS) power harness ‑ Requires connection to the engine starting battery. Provides 12 V power to the DTS system. If the starting battery is located at the helm, a DTS accessory power harness kit is required to minimize the voltage drop. Use cable ties to secure the power harness leads to the battery cables, beginning within 15 cm (6 in.) of the battery posts and continuing along the entire length of the harness.

• Battery cables ‑ Connects between the engine and the engine starting battery.

• Vessel 350 SCi vessel harness connector ‑ The vessel harness connects between the 8 pin connector on the engine and the power steering signal harness, two fuel tank level sensors, and the water separating fuel filter sensor.

IMPORTANT: The 350 Verado SCi engine does not support a paddle wheel speed/sea temperature sensor. • 14 pin data harness ‑ Connects between the 14 pin connector on the engine and the command module harness.

• Vessel adapter harness ‑ Connects an existing fuel tank sensor harness connector to the 350 Verado SCi vessel harness.

NOTE: If the vessel is already wired with a standard Verado fuel level sensor harness, an adapter harness (8M3000376) must be used to connect the fuel level sensor harness to the 350 Verado SCi vessel harness.

• Tab harness connector ‑ Connects between the engine and the trim tabs on the vessel.

a - 14 pin data harness

b - Battery cables

c - DTS power harness

d - 5 amp fuse

e - 8 pin 350 Verado SCi vessel harness connector

f - Trim tab harness connector

Battery Cable Size for Outboard DTS Models

IMPORTANT: Only use copper battery cables. Do not use aluminum cables for any outboard marine installations.

NOTE: If longer battery cables are required, the wire gauge size must increase. See the following chart for correct wire gauge size.

a - Wire gauge size

b - Battery cable length

Cable Length

Copper Battery Cable Wire Gauge Size Number

(SAE) _{Cable Length} Copper Battery Cable Wire Gauge Size Number(SAE)

Verado and OptiMax DTS Engines Verado and OptiMax DTS Engines

2.4 m (8 ft.) ‑ 7.6 m (25 ft.) 1 2.7 m (9 ft.) ‑ 7.9 m (26 ft.) 1/0 3.0 m (10 ft.) ‑ 8.2 m (27 ft.) 1/0 3.4 m (11 ft.) ‑ 8.5 m (28 ft.) 1/0

a

c

d

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f

b

15285 2758

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Cable Length

Copper Battery Cable Wire Gauge Size Number

(SAE) _{Cable Length} Copper Battery Cable Wire Gauge Size Number(SAE)

Verado and OptiMax DTS Engines Verado and OptiMax DTS Engines

3.7 m (12 ft.) 4 8.8 m (29 ft.) 1/0 4.0 m (13 ft.) 2 9.1 m (30 ft.) 1/0 4.3 m (14 ft.) 2 9.4 m (31 ft.) 1/0 4.6 m (15 ft.) 2 9.8 m (32 ft.) 1/0 4.9 m (16 ft.) 2 10.1 m (33 ft.) 2/0 5.2 m (17 ft.) 2 10.4 m (34 ft.) 2/0 5.5 m (18 ft.) 2 10.7 m (35 ft.) 2/0 5.8 m (19 ft.) 2 11.0 m (36 ft.) 2/0 6.1 m (20 ft.) 2 11.3 m (37 ft.) 2/0 6.4 m (21 ft.) 1 11.6 m (38 ft.) 2/0 6.7 m (22 ft.) 1 11.9 m (39 ft.) 2/0 7.0 m (23 ft.) 1 12.2 m (40 ft.) 2/0 7.3 m (24 ft.) 1

Battery Cable Connections to the Engine

The installation order is listed first to last on the stud

a - Starter motor, engine harness, trim harness, alternator 150 amp fusible link output lead, and positive battery cable

b - PCM, fuel level, and negative battery cable

c - Engine harness and transducer ground

d - Open location not to be used

IMPORTANT: The 350 Verado SCi battery ground must only be attached to the stud on the oil module. Do not remove the engine harness ground connections or attach the battery ground to the transducer ground stud. The engine harness ground and transducer ground connections are coated from the factory to maintain harness ground integrity.

1. Remove the cowling and open the cover on the electrical box. 2. Route the battery cables through the front cowl opening.

3. Fasten the negative battery cable to the ground stud on the side of the engine and positive battery cable to the stud in the electrical box. Position the positive battery cable on the stud in the direction as shown. Tighten the hex nuts to the specified torque.

IMPORTANT: Engine malfunction can occur if any of the wire harness ground or power connections are not secure. Ensure power and ground harness leads are secure before installing battery leads.

4. Seal the cable connections with Liquid Neoprene.

5. Close and secure the electrical control box cover with the two fastening straps.

Battery cable hex nuts 17 150

a

b

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d

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25 _{Liquid Neoprene} _{Seal battery cable connections} _{92- 25711 3}

Verado Engine Battery Specifications

IMPORTANT: Verado engines require a 12 volt absorbed glass mat (AGM) marine starting battery that meets the minimum ratings. For best performance, Mercury Marine does not recommend using the more common flooded (wet cell) or gel cell type lead acid batteries for starting Verado engines.

Each Verado engine must be equipped with its own starting battery.

If the boat application requires additional battery loads for boat accessories or marine electronics, it is recommended that an auxiliary battery, or batteries, be installed.

Choose a 12 volt AGM battery which meets the following ratings. USA (SAE) Verado Starting Battery Rating

Required Verado starting battery 12 volt AGM battery

Required marine cranking amps (MCA) and reserve

capacity 800 minimum marine cranking amps with a minimum reserve capacityof 135 minutes RC25 rating International (EN) Verado Starting Battery Rating

Required Verado starting battery 12 volt AGM battery

Required cold cranking amps (CCA) and amp hour (Ah) 975 minimum cold cranking amps (CCA) with a minimum of 65 amp_{hours (Ah)}

NOTE: Do not use an engine starting battery that does not meet the specified ratings. If a battery that does not meet the ratings is used, the electrical system may perform poorly.

IMPORTANT: Boating industry standards (BIA, ABYC, etc.), federal standards, and Coast Guard regulations must be adhered to when installing the battery. Ensure that battery cable installation meets the pull test requirements and that the positive battery terminal is properly insulated in accordance with regulations.

It is recommended (required in some states) that the battery be installed in an enclosed case. Refer to regulations for your area. When connecting the engine battery, hex nuts must be used to secure the battery leads to the battery posts. Tighten the hex nuts to the specified torque.

!

WARNING

Failure to properly secure the battery leads can result in a loss of power to the Digital Throttle and Shift (DTS) system, leading to serious injury or death due to loss of boat control. Secure the battery leads to the battery posts with hex nuts to avoid loose connections.

Hex nuts 13.5 120

IMPORTANT: Battery cable size and length is critical. Refer to Battery Cable Size tables or engine installation manual for size requirements.

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The decal needs to be placed on or near the battery box for future service reference. One 5/16 in. and one 3/8 in. hex nut is supplied per battery for wing nut replacement. Metric hex nuts are not supplied.

NOTICE - Verado Engines

USE ONLY AGM BATTERIES! Verado engines must use an AGM marine battery that meets minimum ratings listed below.

IMPORTANT:

Battery cable size and length is critical. Refer to engine installation manual for size requirements. Place decal on or near battery box for future service reference. 5/16” and 3/8” hex nuts supplied for wing nut replacement. Metric hex nuts not supplied.

DO NOT USE WING NUTS. 13.5Nm (120 lbs. in.) USA (SAE) 800 MCA 135 min RC25 International (EN) 975 CCA 65 Ah 8M0034050 41310

Connecting Battery Cables and DTS Power Harness

!

CAUTION

The DTS power harness connection may be pulled off the battery, resulting in a possible loss of electrical power and loss of throttle and shift control. To avoid the possibility of serious injury or death from a loss of boat control, fasten the DTS power harness to one of the battery cables near the battery with cable tie.

NOTE: Do not extend the lead length of the DTS power harness.

1. Install the DTS power harness directly to the starting battery.

NOTE: The DTS power harness is provided with the 20 in. L models. For XL and XXL models, refer to the Mercury Precision

Parts Accessories Guide for the required DTS power harness kit.

Battery located at the stern

a - 14 pin DTS data harness

b - 2 pin DTS power harness connector

c - DTS power harness

d - Battery

e - Negative engine battery cable

f - Positive engine battery cable

c

a

b

26984

d

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NOTE: For batteries located at the helm, refer to the Mercury Precision Parts Accessories Guide for an optional DTS

power harness connection kit.

Battery located at the helm

a - 14 pin DTS data harness

b - 2 pin DTS power harness connector ‑ weather cap

c - Helm DTS power harness (optional)

d - Battery

e - Negative engine battery cable

f - Positive engine battery cable

g - DTS command module harness

h - Junction box

2. Fasten the DTS power harness to one of the battery cables with a cable tie.

3711

Connecting Existing Fuel Tank Connection to 350 Verado SCi Vessel Harness

When installing a 350 Verado SCi on a vessel already equipped with a fuel tank sensor connector (other than from a 350 Verado SCi vessel harness), a vessel adapter harness is used to connect the existing fuel sensor connection to the 350 Verado SCi vessel harness.

The 350 Verado SCi engine does not support a paddle wheel speed sensor. The connection to the paddle wheel must be disconnected and a weather cap installed on the harness connector.

a

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26988

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(22)

IMPORTANT: Do not connect the BLK/ORG wire (if equipped) to the fuel tank sensor when there is an engine battery ground strap connected to the fuel tank or sender assembly. If not used, plug the unused open bullet connector with a rubber plug. Metal fuel tanks must be grounded to the hull or a battery ground in accordance to Coast Guard regulations.

If the fuel tank is plastic and the fuel sensor mounting plate is not connected to the battery ground, connect the BLK/ORG wire (if equipped) to the fuel sender mounting plate.

a - 350 Verado SCi 8 pin vessel harness connector

b - 350 Verado SCi vessel harness

c - Fuel level 1 connector

d - Fuel level 2/other connector

e - Vessel adapter harness

f - Standard outboard paddle wheel and fuel sensor vessel harness

g - Black/orange wire connection, if equipped

h - Fuel tank

i - To second fuel tank

j - Paddle wheel connector with weather cap

BLK/ORG LT .BLU/BLK PNK/BLK BLK/ORG

a

g

h

i

j

36052

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Switched 12 V Accessory Connection

a - Battery

b - Fuse ‑ 40 amp

c - Power harness with 40 amp fuse

d - Switched 12 V

e - Complete kit

f - Terminal block

g - Accessory power relay

h - DTS command module harness

+ -PUR RED

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DTS Single Engine with Panel Control ‑ Single Helm

38766

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25

30

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31

29

6

28

P X V

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26

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F R F R

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1 - Engine

2 - Engine tab harness connector

3 - Engine CAN X (CAN 2) connector (brown and yellow) ‑ blue 2 pin terminator resistor

4 - 8 pin 350 Verado SCi vessel harness connector

5 - Engine CAN P (CAN 1) connector (blue and white) ‑ yellow 10 pin terminator resistor

6 - 14 pin data harness

7 - 350 Verado SCi vessel harness

8 - Fuel level 1 connector

9 - Fuel level 2/other connector

10 - Water in fuel sensor connector

11 - Power steering signal harness connector

12 - Power steering signal harness

13 - Power steering pump driver module harness

14 - Power steering pump

15 - Single start/stop switch (optional)

16 - Ignition key switch

17 - Digital throttle and shift (DTS) control ‑ panel mount

18 - Throttle/shift connector

19 - Trim up/down connector

20 - Lanyard stop switch bullet connectors

21 - Foot throttle on/off switch connector

22 - Digital throttle and shift (DTS) control with foot throttle on/off switch (optional) ‑ panel mount

23 - Foot throttle (optional)

24 - Foot throttle connector

25 - Warning horn

26 - Command module harness

27 - Switched power relay

28 - SmartCraft gauge connectors (used only with VesselView or SmartCraft Tach)

29 - Junction box

30 - Command module

31 - CAN V (CAN 3) connector (orange and green) ‑ weather cap

32 - CAN X (CAN 2) connector (brown and yellow) ‑ blue 2 pin terminator resistor

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DTS Single Engine with Console Control ‑ Single Helm

RUN OFF 38768

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1 - Engine

15 - Lanyard stop switch

18 - Digital throttle and shift (DTS) control ‑ console mount

20 - Trackpad connector

23 - Warning horn

26 - Junction box

28 - Command module

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DTS Single Engine with Slim Binnacle Console Control ‑ Single Helm

RUN OFF 38767

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1 - Engine

18 - Digital throttle and shift (DTS) slim binnacle console control ‑ console mount

23 - Warning horn

26 - Junction box

28 - Command module

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DTS Dual Engine with Console Control ‑ Single Helm

RUN OFF

10

26

27

28

14

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31

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16 ₁₅

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38769

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1 - Starboard engine

2 - Port engine

13 - CAN P female‑to‑female link harness

16 - Command module

17 - Switched power relay (clean power is required for each engine)

18 - Junction box (only one 4‑way required)

19 - Warning horn

20 - Starboard 2 throttle/shift connector (three or four lever control)

21 - Port 2 throttle/shift connector (four lever control)

24 - Dual start/stop switch (optional)

26 - Dual engine power steering adapter harness

31 - Digital throttle and shift (DTS) dual engine control ‑ console mount

32 - Starboard throttle/shift connector

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DTS Triple Engine with Shadow Mode Control ‑ Single Helm

RUN OFF

13

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38770

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26 ₂₆

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P X V P X X P

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1 - Port engine

2 - Starboard 2 engine

3 - Starboard engine

9 - 10 pin CAN P link harness

15 - CAN P (CAN 1) system link connector (blue and white) ‑ blue 2 pin terminator resistor

17 - CAN P female‑to‑female link harness

19 - Command module

20 - Junction box (only one 4‑way required)

21 - Switched power relay (clean power is required for each engine)

23 - For future use

24 - Resister pack (center engine) (#93)

27 - Triple engine power steering adapter harness

32 - Triple start/stop switch (optional)

33 - Dash mount triple trim switch control

34 - Digital throttle and shift control (DTS) with shadow mode control ‑ console mount

36 - Starboard and port throttle/shift connectors

38 - Quad engine command module harness adapter

39 - Warning horns

System Wiring Installation Checklist

Data Cable

Verify the data harness is not routed near sharp edges, hot surfaces, or moving parts.

Verify data harness is not routed near ignition components (coils, spark plug leads, and spark plugs), high power VHF coax, or radios.

Junction Box (if equipped)

Verify the data harness is not routed near sharp edges, hot surfaces, or moving parts. Ensure the harness connections are fastened within 25.4 cm (10 in.) of the junction box. Verify that all unused receptacles are covered with a weather cap.

Non-Mercury Marine Supplied Ignition Key Switch

If a non‑Mercury Marine ignition key is used, verify that it passes the ingress protection testing per IEC IP66 specification minimum. Ignition switches must pass this specification.

(34)

Electronic Remote Control

Ensure electronic remote control (ERC) connections are completed following ERC installation instructions prior to engine operation.

DTS Command Module Harness

Verify that all connectors are properly inserted and locked in their receptacle (remote control, key switch, command module, lanyard stop switch, and junction box, if equipped).

Verify that while moving the remote control handle (full forward and full reverse) the harness has unobstructed movement (moves freely).

Verify that the lanyard stop switch is wired into the system correctly. Verify that the harness is fastened along the routing path.

Verify that all unused connectors have weather caps to prevent corrosion.

Battery

Verify that wing nuts have been replaced with hex nuts, provided.

Verify that all engine battery cables are connected to the correct terminals.

Verify that the DTS power harness leads are connected to the starting battery and secured with locknuts. Ensure the 5 amp fuse for the DTS power harness is accessible.

Lanyard Stop Switch

Verify that the switch is installed.

Verify that the switch is connected to the DTS command module harness.

Propeller Installation

!

WARNING

Rotating propellers can cause serious injury or death. Never operate the boat out of the water with a propeller installed. Before installing or removing a propeller, place the drive unit in neutral and engage the lanyard stop switch to prevent the engine from starting. Place a block of wood between the propeller blade and the anti‑ventilation plate.

1. To aid in future removal of the propeller, liberally coat the propeller shaft splines with one of the following Mercury/Quicksilver products:

94 Anti-Corrosion Grease Propeller shaft splines 92-802867Q 1

95 _{2-4-C with Teflon} _{Propeller shaft splines} _{92-802859A 1}

2. Flo-torq II drive propellers - Install forward thrust hub, replaceable drive sleeve, propeller, thrust hub, propeller nut retainer, and propeller nut onto the shaft.

a - Propeller nut

b - Propeller nut retainer

c - Thrust hub

d - Propeller

e - Replaceable drive sleeve

f - Forward thrust hub

3. Place a block of wood between gearcase and propeller and torque nut to specification.

Description Nm lb‑in. lb‑ft Nut 75 55

a b

c

d

e

f

26941

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4. Secure propeller nut by bending three of the tabs into the thrust hub grooves.

(36)

Important Information

1

D