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Honda GXR120T User Manual

Honda GXR120T
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A Few Words About Safety
Service Information
The service and repair information contained in this manual is intended for use by qualified, professional technicians. Attempting
service or repairs without the proper training, tools, and equipment could cause injury to you and/or others. It could also damage
this Honda product or create an unsafe condition.
This manual describes the proper methods and procedures for performing service, maintenance, and repairs. Some procedures
require the use special tools. Any person who intends to use a replacement part, service procedure, or a tool that is not
recommended by Honda must determine the risks to their personal safety and the safe operation of this product.
If you need to replace a part, use Honda Genuine parts with the correct part number or an equivalent part. We strongly recommend
that you do not use replacement parts of inferior quality.
For Your Customer’s Safety
Proper service and maintenance are essential to the customer’s safety and the reliability of this product. Any error or oversight
while servicing this product can result in faulty operation, damage to the product, or injury to others.
For Your Safety
Because this manual is intended for the professional service technician, we do not provide warnings about many basic shop safety
practices (e.g., Hot parts-wear gloves). If you have not received shop safety training or do not feel confident about your knowledge
of safe servicing practices, we recommend that you do not attempt to perform the procedures described in this manual.
Some of the most important general service safety precautions are given below. However, we cannot warn you of every
conceivable hazard that can arise in performing service and repair procedures. Only you can decide whether or not you should
perform a given task.
Important Safety Precautions
Make sure you have a clear understanding of all basic shop safety practices and that you are wearing appropriate clothing and
using safety equipment. When performing any service task, be especially careful of the following:
Read all of the instructions before you begin, and make sure you have the tools, the replacement or repair parts, and the skills
required to perform the tasks safely and completely.
Protect your eyes by using proper safety glasses, goggles, or face shields anytime you hammer, drill, grind, or work around
pressurized air, pressurized liquids, springs or other stored-energy components. If there is any doubt, put on eye protection.
Use other protective wear when necessary, for example gloves or safety shoes. Handling hot or sharp parts can cause severe
burns or cuts. Before you grab something that looks like it can hurt you, stop and put on gloves.
Protect yourself and others whenever you have equipment hoisted in the air. Anytime you lift this product with a hoist, make sure
that the hoist hook is securely attached to the product.
Make sure the engine is off before you begin any servicing procedures, unless the instruction tells you to do otherwise. This will
help eliminate several potential hazards:
Carbon monoxide poisoning from engine exhaust. Be sure there is adequate ventilation whenever you run the engine.
Burns from hot parts. Let the engine and exhaust system cool before working in those areas.
Injury from moving parts. If the instruction tells you to run the engine, be sure your hands, fingers, and clothing are out of the
way.
Gasoline vapors and hydrogen gasses from batteries are explosive. To reduce the possibility of a fire or explosion, be careful when
working around gasoline or batteries.
Use only a nonflammable solvent, not gasoline, to clean parts.
Never store gasoline in an open container.
Keep all cigarettes, sparks, and flames away from the battery and all fuel-related parts.
Improper service or repairs can create an unsafe
condition that can cause your customer or others to
be seriously hurt or killed.
Follow the procedures and precautions in this
manual and other service materials carefully.
Failure to properly follow instructions and
precautions can cause you to be seriously hurt or
killed.
Follow the procedures and precautions in this
manual carefully.
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Do you have a question about the Honda GXR120T and is the answer not in the manual?

Honda GXR120T Specifications

General IconGeneral
Displacement118 cc
Compression Ratio8.5:1
Fuel SystemCarburetor
Ignition SystemTransistorized magneto ignition
Oil Capacity0.6 L
Starting SystemRecoil starter
Engine Type4-stroke, single cylinder
Cooling SystemForced air
Valve TrainOHV (Overhead Valve)
Net Power Output3.6 HP (2.7 kW) at 3, 600 rpm
Lubrication SystemForced splash

Summary

Engine Specifications and Drawings

Serial Number Location

Identifies the location of model and engine serial numbers for inquiries.

Type Variations

Details engine configurations and model types in a tabular format.

Dimensions and Weight Specifications

Provides physical measurements and weight data for various engine models.

Engine Performance Specifications

Lists technical data including displacement, power, torque, and fuel consumption.

Engine Performance Curves

Graphical data showing net torque and net power relative to engine speed.

Dimensional Drawings

Illustrates engine dimensions with key measurements.

PTO Dimensional Drawings

Presents detailed diagrams and measurements for Power Take-Off shafts.

Service Information and Standards

Maintenance Standards and Tolerances

Lists specific measurements, clearances, and operational limits for engine parts.

Torque Specifications

Specifies recommended torque values for fasteners and various components.

Lubrication and Seal Points

Identifies locations requiring lubrication and sealing during maintenance procedures.

Required Tools

Lists and illustrates the special tools necessary for engine servicing.

Harness and Tube Routing

Diagrams guide correct installation paths for electrical harnesses and fuel lines.

Engine Maintenance Procedures

Maintenance Tools

Lists tools specifically required for performing maintenance tasks.

Maintenance Schedule

Outlines recommended intervals for checking and servicing engine components.

Engine Oil Level Check and Change

Details the procedure for checking, adding, and changing engine oil.

Air Cleaner Maintenance

Covers inspection, cleaning, and replacement of the air filter element.

Spark Plug Check and Adjustment

Provides guidance for inspecting, gapping, and adjusting the spark plug.

Timing Belt Inspection

Describes how to check the timing belt for wear or damage.

Idle Speed Adjustment

Explains how to set and adjust the engine's idle speed correctly.

Combustion Chamber Cleaning

Method for removing carbon deposits from the combustion chamber.

Valve Clearance Adjustment

Step-by-step guide for checking and adjusting valve clearances.

Engine Troubleshooting Guide

Troubleshooting Preparation

Essential initial checks and considerations before diagnosing engine problems.

Engine Fails to Crank

Diagnostic steps for issues preventing the engine from turning over.

Engine Cranks But Won't Start

Troubleshooting procedures for engines that rotate but do not ignite.

Engine Speed Issues

Diagnoses problems related to unstable or insufficient engine speed.

Engine Fails to Stop (Switch)

Troubleshoots failures of the engine stopping mechanism related to the stop switch.

Engine Fails to Stop (Low Oil)

Troubleshoots failures of the engine stopping mechanism due to low oil level.

Wiring Diagrams

Understanding Wiring Diagrams

Guidance on interpreting wiring diagrams, connectors, and system symbols.

Electrical System Diagrams

Presents detailed schematics of the engine's electrical circuits.

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