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Honda BF25A User Manual

Honda BF25A
112 pages
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Table of Contents

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Honda BF25A Specifications

General IconGeneral
Full Throttle RPM Range5000-6000 RPM
Cooling SystemWater-cooled
Fuel DeliveryCarburetor
ExhaustThrough propeller
LubricationWet sump
Oil Capacity1.1 L
Gear Ratio2.08:1
Power TiltOptional
Gear ShiftF-N-R
Engine Type4-Stroke
Rated Power25 HP
Starting SystemManual
Recommended FuelUnleaded gasoline
Fuel Tank Capacity12 L
Propeller3-blade
Tiller HandleOptional
Shaft Length20 in (long shaft), 15 in (short shaft)
Alternator Output12V 10A

Summary

Introduction

A Few Words About Safety

General safety advice and overview of warnings and signal words.

Outboard Motor Safety

Important Safety Information

Key safety guidelines for operating the outboard motor and operator responsibility.

Safety Label Locations and Meanings

Identifies warning labels on the motor and explains their meanings.

Component Identification

Tiller Handle Type Components

Identifies the various parts of the tiller handle type outboard motor.

Remote Control Type Components

Identifies the various parts of the remote control type outboard motor.

Fuel System Components

Identifies components of the fuel tank, hose, and primer bulb.

Controls and Instruments

Tiller Handle Controls: Start, Shift, Choke

Explains engine start button, gearshift lever, and choke knob for tiller models.

Tiller Handle Controls: Throttle & Stop

Details throttle grip, indicator, friction knob, and stop switches for tiller models.

Tiller Handle Controls: Indicators & Starter

Explains oil pressure indicator light and recoil starter for tiller models.

Remote Control Lever & Ignition

Details the remote control lever and ignition switch for remote models.

Remote Controls: Safety & Choke

Explains neutral release, emergency stop, and choke/fast idle levers.

Remote Controls: Indicators

Explains oil pressure and overheat indicator lights and buzzers.

Common Controls: Tilt Lever & Trim Tab

Explains tilt lever operation and trim tab adjustment for all models.

Common Controls: Anode, Cooling, Intakes

Details anode, cooling system indicator, and water intakes.

Common Controls: Transom Angle & Fuel

Covers transom angle rod, fuel cap, gauge, and vent knob.

Common Controls: Over-Rev Limiter

Explains the engine over-rev limiter function and its activation.

Installation Procedures

Installation Position and Height

Guidance on where and how high to mount the outboard motor.

Motor Attachment and Engine Cover

Procedures for attaching the motor and removing/installing the engine cover.

Pre-Operation Checks

Engine Oil Checks and Replacement

How to check and maintain engine oil level and condition.

Fuel Level and Recommendations

Instructions for checking fuel, fuel recommendations, and oxygenated fuels.

Propeller, Cotter Pin, and Steering Checks

Checks for propeller damage, cotter pin, and steering friction adjustment.

Remote Control and Other Checks

Covers remote control friction and general checks like fuel hose and anode.

Starting the Engine

Fuel System Preparation for Starting

Connecting fuel lines, checking vent knob, and priming the fuel system.

Tiller Handle Starting Procedure

Step-by-step guide for starting the engine using tiller controls.

Remote Control Starting Procedure

Step-by-step guide for starting the engine using remote controls.

Emergency Starting Procedures

Instructions for starting the engine using emergency methods.

Troubleshooting Starting Problems

Common problems and remedies for engine starting issues.

Operation of the Outboard Motor

Break-in Procedure

Guide for the initial 10-hour break-in period for new motors.

Tiller Handle Operation: Shifting & Steering

How to shift gears, steer, and cruise with tiller controls.

Remote Control Operation: Shifting & Cruising

How to shift gears and cruise using remote controls.

Tilt Lever and Motor Angle Operation

Operation of the tilt lever and its effect on motor angle for various situations.

Trim Tab Adjustment for Handling

Adjusting the trim tab for optimal boat trim and handling.

Motor Protection Systems: Warnings

Explanation of warning systems for oil pressure and overheating.

High Altitude Operation Considerations

Considerations and modifications for operating the motor at high altitudes.

Stopping the Engine

Tiller Handle Engine Stop Procedures

Procedures for stopping the engine using tiller controls.

Remote Control Engine Stop Procedures

Procedures for stopping the engine using remote controls.

Transporting the Outboard Motor

Trailer and Horizontal Transport Guidelines

Guidelines for transporting the outboard motor via trailer or horizontally.

Cleaning and Flushing the Motor

Flushing Procedure with Fresh Water

How to clean and flush the motor with fresh water after use.

Maintenance Procedures

Importance and Safety Precautions

Why maintenance is crucial and essential safety precautions to follow.

Emission Control System and Star Labels

Details on emission control systems, regulations, and star labels.

Maintenance Schedule and Intervals

Recommended maintenance intervals and tasks for regular service.

Engine Oil and Gear Oil

Procedures for checking and replacing engine oil and gear oil.

Spark Plugs, Battery, and Lubrication

Maintenance for spark plugs, battery requirements, and lubrication points.

Fuel Filter, Tank, and Fuse Maintenance

Maintenance for the engine fuel filter, fuel tank, and fuse replacement.

Propeller and Submerged Motor Service

Propeller replacement and procedures for servicing a submerged motor.

Storage Procedures

Storage Positions and Carburetor Draining

How to store the outboard motor and drain carburetors for storage.

Troubleshooting Engine Problems

Engine Does Not Start

Diagnosing and fixing engine starting problems related to fuel and electrical systems.

Engine Stops or Overheats

Troubleshooting issues with the engine stopping unexpectedly or overheating.

Specifications

Model Specifications (BF25A/BF30A)

Technical data and dimensions for BF25A and BF30A models.

Tuneup Specifications and Adjustments

Specific tuneup parameters like spark plug gap and idle speed.

Warranty Service Information

Obtaining Warranty Service

How to obtain warranty service and what information is required.

Wiring Diagrams

Tiller Handle Type Wiring Diagrams

Electrical wiring diagrams for tiller handle type outboard motors.

Remote Control Type Wiring Diagrams

Electrical wiring diagrams for remote control type outboard motors.

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