Toro GTS 120 - User Manual

2-CYCLE GTS 120 ENGINE SERVICE MANUAL
Table of Contents – Page 1 of 1
PREFACE
I. GENERAL INFORMATION
SAFETY INSTRUCTIONS
MAINTENANCE
MODEL AND SERIAL NUMBERS
TWO-CYCLE ENGINE THEORY AND OPERATION
CARBURETOR THEORY AND OPERATION
SPECIAL TOOLS LIST
II. MAINTENANCE
AIR CLEANER
SPARK PLUG
EXHAUST SYSTEM
DECARBONING CYLINDER HEAD
IGNITION TIMING (MODEL 47PZ2 ONLY)
IGNITION TIMING (DIAL INDICATOR)
CONTACT POINTS AND CONDENSER MODEL47PZ2 ONLY
IGNITION COIL
GOVERNOR
GOVERNOR OPERATION
FUEL TANK
CARBURETOR
STORAGE
III. TROUBLESHOOTING AND TEST PROCEDURES
PRELIMINARY TROUBLESHOOTING
ENGINE BRAKE AND IGNITION SWITCH
BBC APPLICATIONS
FUEL TANK
TESTING COMPRESSION
CRANKCASE
ENGINE TROUBLESHOOTING CHART
IV. ENGINE REMOVAL, DISASSEMBLY, ASSEMBLY AND REPAIR INSTRUCTIONS
ENGINE REMOVAL
ENGINE DISASSEMBLY AND REPAIR
RECOIL STARTER REPAIR
CARBURETOR REPAIR
ENGINE ASSEMBLY AND REPAIR
SERVICE DATA SPECIFICATIONS

Toro GTS 120 Specifications

General

Brand	Toro
Model	GTS 120
Category	Engine
Language	English

Summary

GENERAL INFORMATION

SAFETY INSTRUCTIONS

General safety guidelines for operating the Toro mower.

MODEL AND SERIAL NUMBERS

Identifying engine and chassis model and serial numbers.

TWO-CYCLE ENGINE THEORY AND OPERATION

Principles of two-cycle engine loop-scavenged design.

CARBURETOR THEORY AND OPERATION

How the carburetor mixes fuel and air for combustion.

ENGINE SPECIFICATIONS

Technical specifications for Toro engine models.

FASTENER TORQUE SPECIFICATIONS

Torque values for engine fasteners.

SPECIAL TOOLS LIST

List of specialized tools and their part numbers.

MAINTENANCE

CAUTION

Warning against performing maintenance while the engine is running.

AIR CLEANER

Instructions for inspecting and cleaning the air cleaner element.

SPARK PLUG

Guidance on inspecting, checking gap, and replacing spark plugs.

EXHAUST SYSTEM

Steps to clean the muffler and exhaust port for carbon buildup.

DECARBONING CYLINDER HEAD

Procedure for removing carbon deposits from the cylinder head.

IGNITION TIMING (MODEL 47 PZ2 ONLY)

How to check and adjust ignition timing on the 47PZ2 model.

IGNITION TIMING (DIAL INDICATOR)

Using a dial indicator to check ignition timing.

CONTACT POINTS AND CONDENSER MODEL 47 PZ2 ONLY

Inspecting and servicing contact points and condenser.

IGNITION COIL

Checking ignition coil condition and air gap.

GOVERNOR

How to inspect and adjust the governor linkage.

GOVERNOR OPERATION

How the governor regulates engine speed under load changes.

FUEL TANK

Instructions for checking and cleaning the fuel tank and vent.

CARBURETOR

How to clean and disassemble the carburetor.

STORAGE

Procedures for storing the engine to prevent damage.

TROUBLESHOOTING AND TEST PROCEDURES

PRELIMINARY TROUBLESHOOTING

Initial checks for ignition, fuel, air cleaner, compression, and crankcase.

SPARK INTENSITY

How to test spark intensity using a spark tester.

ENGINE BRAKE AND IGNITION SWITCH

How to troubleshoot the engine brake and ignition switch system.

BBC APPLICATIONS

Explains the Blade Brake Clutch (BBC) kill switch function.

FUEL TANK

Troubleshooting fuel system issues related to the fuel tank.

TESTING COMPRESSION

How to perform a compression test on the engine.

CRANKCASE

How to detect and diagnose crankcase leaks.

ENGINE TROUBLESHOOTING CHART

A chart of symptoms, causes, and remedies for engine malfunctions.

ENGINE REMOVAL, DISASSEMBLY, ASSEMBLY AND REPAIR INSTRUCTIONS

ENGINE REMOVAL

Steps to remove the engine from the mower chassis.

ENGINE DISASSEMBLY AND REPAIR

General steps for disassembling the engine on the mower.

RECOIL STARTER REPAIR

Detailed instructions for repairing the recoil starter assembly.

CARBURETOR REPAIR

Steps for cleaning, disassembling, and reassembling the carburetor.

ENGINE ASSEMBLY AND REPAIR

General steps for reassembling the engine.

SERVICE DATA SPECIFICATIONS

Specifications for crankshaft alignment.