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| Home / Engines / Honda Engines / Honda GCV135 |
Honda GCV135 Troubleshooting
| Engine Model: Honda GCV135 |
| Engine Type: 4-cycle overhead camshaft 1-cylinder air-cooled gasoline |
| Total Displacement: 8.2 cu.in (135 cc) |
| Rated Engine Power: 4.5 Hp (3.3 kW) at 3600 rpm |
| Fuel System: Horizontal carburetor with butterfly valve |
| Engine difficult to start or will not start |
Empty fuel tank - Fill gasoline up.
Improper fuel grade - Change gasoline.
Clogged fuel system - Remove clogging.
Defective spark plug wire connection - Check the spark plug wire connection, repair or replace.
Defective spark plug - Replace spark plug.
Plugged fuel filter - Install new filter.
Faulty safety switch - Change damaged switch.
Carburetor settings incorrect - Adjusting as required.
Poor compression - Inspect and replace wear parts.
Choke cable is damaged or not adjusted properly - Change cable or adjust correctly.
| Unstable engine running |
Air intake screen is blocked - Wash or clean as required.
Ignition system failure - Test ignition and replace failed parts.
Choke cable is defective or stuck - Change or clean the cable.
Dirty air filter element - Clean or replace air filter.
Dirty or damaged fuel pump - Clean or install new fuel pump.
| Engine starts but then stalls |
Damaged spark plug - Replace spark plug.
Carburetor is dirty or faulty - Service or repair carburetor.
Damaged ignition coil - Replace ignition coil as necessary.
Valve springs are worn or loose - Change valve springs.
Valves are stuck - Valves must be cleaned.
| Engine overheats |
Engine oil insufficient - Fill up the engine oil.
Engine is running overloaded - Reduce the load.
Air intake screen is plugged - Need to wash or clean.
Too lean fuel mixture in carburetor - Use proper settings.
Ignition timing is wrong - Adjust ignition timing as required.
Valve setting is incorrect - Set the valves correctly.
| Engine noise or knocking |
Stale or low octane fuel - Use proper gasoline.
Excessive engine load - Load reducing is recommended.
Engine oil level is insufficient - Checking oil level and add if necessary.
Too low idle RPM - Adjust the low idle speed.
Clogged or defective fuel pump - Clean or replace fuel pump.
Crankshaft or main bearings failure - Worn parts replacement required.
Excessive valve clearance - Check and adjust.
Damaged piston rings or cylinder bore - Replace defective components.
| Low engine power |
Clogged or incorrectly adjusted carburetor - Service or properly adjust carburetor.
Air filter element is plugged - Service or change air filter.
Clogged or defective fuel pump - Check fuel pump and replace if necessary.
Ignition failure - Inspect ignition system and change failed components.
Worn cylinder head gasket - Cylinder-head gasket replacement required.
Valves are stuck or burned - Change or service valves.
Worn or defective push rod - Push rod should be replaced.
Faulty cylinder block components - Replace defective components.
Plugged oil filter (if equipped) - Clean or replace oil filter.
| Excessive fuel consumption |
Insufficient throttle opening - Adjust or replace throttle cable.
Improper adjustment of carburetor main jet - Adjust main jet as required.
Loose or faulty spark plug - Re-tighten or replace spark plug.
Valves are worn, stuck, or burned - Clean or replace valves.
Sleeve, rings, or piston are damaged - Change defective parts.
Incorrect valve clearance - Adjustment procedure required.
| Excessive oil consumption |
Damaged gaskets or seals - Change worn parts according to specifications.
Worn valve guides and valve stems - Valves need to be changed.
Piston rings are stuck or broken - Piston rings replacement required.
Cylinder liner or piston is worn - Check liner and piston, change as required.
Breather pipe or hose is plugged - Clean or replace.
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