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Yanmar 1GM User Manual

Yanmar 1GM
240 pages
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YANMAR
DIESEL
INBOARD
SHOP
MANUAL
ONE, TWO
s,
THREE
CYLINDER
ENGINES

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Yanmar 1GM Specifications

General IconGeneral
Number of Cylinders1
Cooling SystemWater-cooled
Combustion SystemIndirect injection
Lubrication SystemForced lubrication by trochoid pump
Cooling System TypeFreshwater cooling with heat exchanger
Engine Typevertical, water-cooled, 4-stroke diesel engine
Starting SystemElectric start
Fuel SystemMechanical fuel injection

Summary

Chapter One - General Information

NOTES, CAUTIONS AND WARNINGS

Defines important terms and alerts users to risks of damage or injury.

SAFETY FIRST

Provides essential safety rules for working on engines to prevent injury.

PARTS REPLACEMENT

Guides on ordering and replacing engine parts correctly using model and serial numbers.

Chapter Two - Troubleshooting

FUEL SYSTEM

Covers common fuel system problems and troubleshooting steps to ensure proper fuel delivery.

Cooling System

Addresses engine overheating causes and troubleshooting steps for the cooling system.

Engine Troubleshooting

Provides a systematic guide to diagnosing and resolving various engine performance problems.

Chapter Three - Operation, Lubrication, Maintenance and Tune-up

ENGINE MAINTENANCE AND LUBRICATION

Outlines crucial maintenance tasks and lubrication schedules for engine longevity.

Fuel System Service

Emphasizes clean fuel and proper maintenance for the diesel fuel system to prevent damage.

ENGINE TUNE-UP

Outlines the procedures required to restore and maintain maximum engine performance.

Compression Test

Explains how to perform a compression test to assess engine cylinder health.

Valve Clearance Adjustment

Details the procedure for adjusting valve clearance for proper engine operation.

Chapter Four - Lay-up and fitting Out

LAY-UP

Provides essential preparation steps for engine lay-up to prevent damage during storage.

COOLING SYSTEM DRAINING

Details procedures for draining cooling systems to prevent freeze damage.

FITTING OUT

Guides on preparing the engine and boat for use after storage, including checks and reassembly.

Chapter Five - Single-Cylinder Engines

Chapter Six - Multicylinder Engines

PISTON/CONNECTING ROD ASSEMBLY

Outlines procedures for removing, inspecting, and assembling pistons and connecting rods.

Chapter Seven - Fuel Injection and Governor Systems

Fuel Injection Pump

Details the operation, precision requirements, and service of the fuel injection pump.

Fuel Injector

Describes the function, operation, and maintenance of the fuel injector nozzle.

Fuel and Fuel Filters

Emphasizes the critical importance of clean fuel and proper filtering for diesel system health.

FUEL INJECTION SYSTEM BLEEDING

Provides procedures for purging air from the fuel system to ensure proper engine operation.

FUEL INJECTION TIMING

Explains the importance and procedure for setting correct fuel injection timing for optimal combustion.

GOVERNOR SYSTEM

Covers the operation, adjustments, and service of the engine governor system.

Chapter Eight - Cooling System

SEAWATER PUMP

Covers removal, installation, disassembly, and inspection of the seawater pump.

Chapter Nine - Electrical System

SAFETY PRECAUTIONS

Highlights crucial safety measures when working with batteries and electrical systems.

BATTERY

Discusses battery selection, types, and general care for marine applications.

Jump Starting

Outlines the procedure for safely jump-starting an engine from another battery.

CHARGING SYSTEM

Covers the components and preliminary testing of the engine's charging system.

STARTING SYSTEM

Describes the components and troubleshooting procedures for the engine's starting system.

Chapter Ten - Transmission-KM Series

Chapter Eleven - Transmission-KBW Series

OPERATION

Explains the basic operation of the KBW series transmissions, including clutch and shift mechanisms.

Wiring Diagrams

EARLY MODELS WITH LARGE INSTRUMENT PANEL

Provides a wiring diagram for early models with a large instrument panel.

EARLY MODELS WITH SMALL INSTRUMENT PANEL (NO TACHOMETER)

Offers a wiring diagram for early models featuring a small instrument panel and no tachometer.

LATE MODELS WITH LARGE INSTRUMENT PANEL

Presents a wiring diagram for late models equipped with a large instrument panel.

LATE MODELS WITH SMALL INSTRUMENT PANEL (NO TACHOMETER)

Shows a wiring diagram for late models with a small instrument panel and no tachometer.

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