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Generac Power Systems GTH760

Generac Power Systems GTH760
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ENGINE
SERVICE
MANUAL
AIR-COOLED ENGINES
OHVI® V-Twin Engine
MODELS:
GTH760/990/1000
GTV760/990/1000
®
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Generac Power Systems GTH760 Specifications

General IconGeneral
BrandGenerac Power Systems
ModelGTH760
CategoryEngine
LanguageEnglish

Summary

Rules for Safe Operation

Safety Alert Symbols and Definitions

Explains DANGER, WARNING, CAUTION, NOTE blocks and associated safety symbols.

Pre-Operation Safety Checks

Essential safety checks and precautions before starting the engine.

Safe Operation Guidelines

Critical safety practices to follow while the engine is running.

Section 1: General Information

Maintenance Schedule

Schedule for engine maintenance tasks like oil changes, filter service.

Fuel and Oil Recommendations

Recommended fuel types and oil weights for optimal engine performance.

Section 2: Ignition

Adjust Ignition Coil Air Gap

Steps to set the correct air gap between the coil and flywheel magnet.

Section 3: Carburetion and Fuel System

Testing the Fuel Shut-off Solenoid

Procedure to test the 12-volt fuel shut-off solenoid.

Section 4: Governor Controls and Governor

Static Governor Adjustment

How to perform static adjustment of the governor linkage.

Dynamic Governor Adjustment

Steps for adjusting engine speed while running.

Section 6: Electric Starter

Troubleshooting

Common starting issues and their potential causes.

Engine Cranks Slowly

Identifies reasons for slow engine cranking.

Engine Will Not Crank

Lists causes for the engine failing to crank.

Starter Motor Spins but Does Not Crank Engine

Diagnoses issues when the starter motor turns but doesn't engage.

Test Starter Motor

Procedures for testing the starter motor and solenoid.

Section 8: Lubrication System

Checking the Engine Oil Level

Procedure for checking and maintaining the engine oil level.

Changing the Engine Oil and Filter

Steps for changing the engine oil and oil filter.

Section 9: Engine Disassembly

Engine Disassembly

General steps to disassemble the engine and remove components.

Section 10: Cylinder & Crankcase Cover

Check Cylinder Bores for Wear

Procedures for measuring cylinder bore wear and out-of-round condition.

Section 12: Piston, Rings & Connecting Rod Inspection & Assembly

Checking Piston and Rings

How to check piston ring groove wear and ring end gap.

Checking Piston Pin and Connecting Rod

Procedures for checking piston pin and connecting rod bearings.

Assemble Piston and Connecting Rod

Instructions for assembling pistons and connecting rods.

Assemble Piston Rings to Piston

Steps for installing piston rings onto the piston.

Section 13: Engine Assembly

Install Piston and Connecting Rod

Procedure for installing piston and connecting rod assemblies.

Adjust Ignition Coil Air Gap

How to adjust the air gap for the ignition coils.

Adjust Valve Clearance

How to adjust valve clearance for both cylinders.

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