Honda GC190 User Manual

text 8/5/03 2:01 PM Page 66
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Honda GC190 Specifications

General

Engine Type	4-stroke, overhead cam, single-cylinder
Compression Ratio	8.5:1
Net Torque	8.3 lb-ft (11.3 Nm) at 2, 500 RPM
PTO Shaft Rotation	Counterclockwise (from PTO shaft side)
Ignition System	Transistorized magneto
Starting System	Recoil starter
Lubrication System	Forced splash
Fuel Type	Unleaded gasoline (86 octane or higher)
Displacement	187 cm³
Bore x Stroke	69 mm x 50 mm
Net Power Output	4.8 HP (3.6 kW) @ 3, 600 rpm
Oil Capacity	0.61 US qt (0.58 L)
Air Cleaner	Dual element

Summary

A FEW WORDS ABOUT SAFETY

SERVICE INFORMATION

Information for qualified technicians on proper service procedures.

For Your Customer's Safety

Importance of proper service for customer safety and engine reliability.

1. SPECIFICATIONS

Engine Performance Specifications

Details engine displacement, power, and torque ratings.

Wiring and Wire Routing

Wiring Diagram Overview

Illustrates the engine's electrical wiring connections and components.

THE IMPORTANCE OF PROPER SERVICING

Important Safety Precautions

Critical safety measures for performing maintenance and repairs.

Cam Pulley, Crankshaft, Piston, Cylinder Block Inspection

TORQUE VALUES

Standard Torque Values

Lists torque specifications for various fasteners and components.

Troubleshooting - General Symptoms

Hard Starting Diagnosis

Diagnoses and solutions for engine hard starting issues.

Engine Lacks Power Diagnosis

Troubleshooting steps for reduced engine power.

ENGINE STARTS BUT THEN STALLS

Fuel System Stalling Diagnosis

Diagnoses and resolves engine stalling due to fuel system issues.

Ignition and Compression Stalling Issues

Addresses stalling related to ignition and cylinder compression.

ENGINE LACKS POWER

Air Filter and Carburetor Power Loss

Diagnoses power loss related to air filter and carburetor condition.

Ignition and Compression Power Loss

Addresses power loss from ignition or compression problems.

ENGINE SPEED DOES NOT INCREASE

Governor and Valve Clearance Adjustment

Adjusting governor and valve clearance to improve engine speed.

Carburetor and Spark Plug Checks for Speed

Checking carburetor and spark plug for issues affecting engine speed.

MAINTENANCE SCHEDULE

Regular Service Intervals

Outlines scheduled maintenance tasks based on operating hours or time.

ENGINE OIL

Oil Level Switch Operation and Testing

Explains the oil level switch function and how to test it.

Engine Oil Level Check Procedure

Step-by-step guide for checking and maintaining engine oil level.

Oil Change

Engine Oil Change Procedure

Detailed steps for draining and refilling engine oil.

AIR CLEANER

Air Cleaner Cleaning and Inspection

Instructions for cleaning and inspecting the air filter and cleaner assembly.

SPARK PLUG

Spark Plug Inspection and Cleaning

Procedure for inspecting, cleaning, and checking the spark plug.

Spark Plug Gap Adjustment

VALVE CLEARANCE

Valve Clearance Inspection Procedure

Steps to inspect valve clearance with a cold engine.

Valve Clearance Adjustment Procedure

Detailed steps for adjusting valve clearance using special tools.

CARBURETOR

Pilot Screw and Throttle Stop Screw

GOVERNOR

Governor Adjustment Procedure

Steps for adjusting the governor to control engine speed.

Carburetor Reassembly Procedures

Carburetor Body Reassembly Steps

Float Valve and Float Chamber Reassembly

Carburetor Component Inspection and Replacement

Float Level Height Inspection

Pilot Screw and Limiter Cap Replacement

FLYWHEEL/IGNITION COIL

Ignition Coil Inspection and Adjustment

Procedures for inspecting and adjusting the ignition coil and its air gap.

Flywheel Removal

Flywheel Installation

IGNITION COIL INSPECTION AND ADJUSTMENT

Ignition Coil Resistance Measurement

Ignition Coil Air Gap Adjustment

CAM PULLEY/ROCKER ARM

Cylinder Head Cover Servicing

Cam Pulley and Rocker Arm Servicing

Cam Pulley, Crankshaft, Piston, Cylinder Barrel Servicing

Crankcase Cover, Crankshaft, Cylinder Barrel

Procedures for removing/installing crankcase cover, crankshaft, and cylinder barrel.

Piston and Connecting Rod Assembly

PISTON

Piston Ring Inspection and Reassembly

Inspecting piston rings and reassembling them onto the piston.

Piston Pin Clip Installation

Piston and Connecting Rod Reassembly

VALVES

Valve Spring and Retainer Servicing

Valve Reassembly and Inspection

Oil Level Switch Inspection

Connecting Rod Big End Clearance Measurement

Connecting Rod Big End Axial Clearance

Connecting Rod Big End Oil Clearance

Measures oil clearance of the connecting rod big end using plastigauge.

Fuel System - Fuel Tank Cap

Fuel Tank Cap Evaporative Emission Control

Explains the function of the fuel cap's emission control system.