Force 75 User Manual

90-826881990 398- 1 -Printed in U.S.A.
FORCE 75/90/120 MODELS
INSTALLATION MANUAL
NOTICE to INSTALLER
After Completing Installation, These Instruc-
tions Should Be Placed with the Product for
the Owner’s Future Use.
75/90/120 Model
This installation manual provides outboard installa-
tion procedure, proper setup and necessary adjust-
ments. PLEASE READ CAREFULLY AND THOR-
OUGHLY BEFORE BEGINNING INSTALLATION.
The remote control connected to your outboard
MUST be equipped with a start-in-gear protection de-
vice. This prevents the engine from starting when the
outboard is in gear.
1998 Mercury Marine
The following are registered trademarks of Brunswick Corpora-
tion: Autoblend, Force, Jet-Prop, Mariner, Merc, MerCathode,
MerCruiser, Mercury, Mercury Marine, Quicksilver, Ride-Guide,
Sport-Jet, and Thruster.
Table of Contents
Page
Notice to Installer and Owner 2. . . . . . . . . . . . . . . . .
Selecting Steering Cables and
Remote Control Cables 2. . . . . . . . . . . . . . . . . . . .
Installing Outboard on Transom 2. . . . . . . . . . . . . . .
Determining Recommended
Outboard Mounting Height 2. . . . . . . . . . . . . .
Locating Centerline of Boat Transom 2. . . . . . .
Drilling Outboard Mounting Holes 3. . . . . . . . . .
Lifting Outboard 3. . . . . . . . . . . . . . . . . . . . . . . . .
Securing Outboard to Boat Transom 3. . . . . . . .
Ride Guide Steering Cable/Attaching
Kit Installation 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installing Ride Guide Steering
Cable To The Outboard 4. . . . . . . . . . . . . . . . .
Steering Link Rod Installation 4. . . . . . . . . . . . . .
Lubrication 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Remote Control Installation 5. . . . . . . . . . . . . . . . . . .
Shift and Throttle Cable
Installation to the Outboard 6. . . . . . . . . . . . . . . . .
Shift Cable Installation 6. . . . . . . . . . . . . . . . . . . .
Throttle Cable Installation 6. . . . . . . . . . . . . . . . .
Fuel Line Installation 7. . . . . . . . . . . . . . . . . . . . . . . . .
Fuel Line 7. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Portable Fuel Tank 8. . . . . . . . . . . . . . . . . . . . . . .
Permanent Fuel Tank 8. . . . . . . . . . . . . . . . . . . . .
Required Side Mount Remote Control
or Ignition Key Switch Assembly 8. . . . . . . . . . . . .
Boats Equipped with Side Mount
Remote Control 8. . . . . . . . . . . . . . . . . . . . . . . .
Boats equipped with Panel
or Console Mount Remote Control 8. . . . . . .
Connecting Remote Control or Key Switch Wire
Harness to Engine Wire Harness 8. . . . . . . . . . . .
Battery Connections 9. . . . . . . . . . . . . . . . . . . . . . . . .
Propeller Selection 9. . . . . . . . . . . . . . . . . . . . . . . . . .
Propeller Installation 9. . . . . . . . . . . . . . . . . . . . . . . . .
Power Trim System 10. . . . . . . . . . . . . . . . . . . . . . . . .
General Information 10. . . . . . . . . . . . . . . . . . . . .
Power Trim Operation 10. . . . . . . . . . . . . . . . . . .
Trim “In” Angle Adjustment
(Models With Power Trim) 11. . . . . . . . . . . . . .
Checking Power Trim Fluid Level 11. . . . . . . . .
Tilt Pin Adjustment
(Models Without Power Trim) 11. . . . . . . . . . . . . .
Trim Tab Adjustment 12. . . . . . . . . . . . . . . . . . . . . . . .
Boat Performance 13. . . . . . . . . . . . . . . . . . . . . . . . . .
Test Instructions 13. . . . . . . . . . . . . . . . . . . . . . . .

Force 75 Specifications

General

Horsepower	75 hp
Cylinders	3
Engine Type	2-Stroke
Starting System	Electric
Fuel System	Carburetor
Shaft Length	20 inch

Summary

Installing Outboard on Transom

Determining Recommended Outboard Mounting Height

Determines the ideal outboard mounting height based on transom size for optimal performance.

Locating Centerline of Boat Transom

Locates and marks the vertical centerline of the boat's transom for precise alignment.

Selecting Steering Cables and Remote Control Cables

Drilling Outboard Mounting Holes

Lifting Outboard

Securing Outboard to Boat Transom

Installing Ride Guide Steering Cable To The Outboard

Steering Link Rod Installation

Remote Control Installation

Lubrication

Shift and Throttle Cable Installation to the Outboard

Shift Cable Installation

Guides the installation and adjustment of the shift cable for proper engine gear engagement.

Throttle Cable Installation

Details the installation and adjustment of the throttle cable for correct engine speed control.

Fuel Line Installation

Fuel Line

Covers the specifications and installation of the fuel line from the tank to the engine.

Fuel Tank Installation

Required Side Mount Remote Control or Ignition Key Switch Assembly

Boats Equipped with Side Mount Remote Control

Specifies the need for a warning horn with the side mount remote control for overheat warnings.

Boats equipped with Panel or Console Mount Remote Control

Specifies the need for a warning horn with panel/console controls for overheat warnings.

Connecting Remote Control or Key Switch Wire Harness to Engine Wire Harness

Battery Connections

Propeller Selection

Propeller Installation

Power Trim System

Power Trim System General Information

Provides basic information about the power trim system's pre-fill status and pressurization.

Power Trim Operation

Explains how to operate the power trim system and the associated steering torque effects.

Trim "In" Angle Adjustment (Models With Power Trim)

Checking Power Trim Fluid Level

Tilt Pin Adjustment (Models Without Power Trim)

Trim Tab Adjustment

Boat Performance

Test Instructions

Outlines procedures for testing engine RPM, acceleration, and boat performance settings.