Honda GX22 Troubleshooting
| Engine Model: Honda GX22 |
| Engine Type: 4-cycle single-cylinder OHV air-cooled gasoline |
| Total Displacement: 1.3 cu.in (22 cc) |
| Rated Engine Power: 1 Hp (0.75 kW) at 7000 rpm |
| Carburetor Type: Diaphragm |
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| Engine hard starting or not starting |
No gasoline in tank - Add gasoline.
Low-quality gasoline - Change fuel.
Air in fuel tank - Bleed fuel tank.
Defective spark plug wire connection - Check spark plug wiring connection, repair or change.
Damaged spark plug - Install new spark plug.
Dirty fuel filter - Replace fuel filter.
Faulty safety switch - Change damaged switch.
Carburetor is dirty - Wash, clean and adjust.
Poor compression - Inspect and replace wear parts.
Damaged or not adjusted choke cable - Change cable or adjust properly.
| Engine runs intermittently |
Plugged cooling fins - Need to clean or wash.
Defective ignition - Inspect ignition system and change failed components.
Faulty or stuck throttle cable - Replace or service the cable.
Plugged air filter - Service or replace air filter.
Fuel pump is dirty or defective - Check fuel pump and change if required.
| Engine starts but then shuts off |
Faulty spark plug - Replace spark plug.
Carburetor is faulty or dirty - Service or change carburetor.
Damaged ignition coil - Install a new ignition coil.
Valve springs are bad or broken - Install new valve springs.
Stuck valves - Valves need to be cleaned.
Low engine oil level - Check and refill engine oil.
Engine overloaded - Load reducing is recommended.
Plugged cooling fins - Clean and wash as required.
Carburetor fuel mixture is too lean - Adjust carburetor properly.
Ignition timing is wrong - Set the ignition timing properly.
Valve setting is incorrect - Set the valves correctly.
| Abnormal engine knocking or noise |
Stale or low octane fuel - Change fuel.
Excessive engine load - Load reducing is recommended.
Low engine oil level - Check oil level and add oil as required.
Low idle speed setting is not correct - Adjust the low idle speed.
Dirty or defective fuel pump - Test fuel pump and replace if necessary.
Crankshaft or main bearings failure - Replace crankshaft or bearings.
Valve clearance is wrong - Adjust valve clearance.
Worn cylinder bore or piston rings - Change faulty components.
Carburetor is clogged or improperly adjusted - Adjust carburetor properly or service it.
Air filter is dirty - Change or service air filter.
Fuel pump is clogged or faulty - Check fuel pump and replace if necessary.
Defective ignition system - Check ignition system and replace faulty parts.
Cylinder head gasket is worn - Change cylinder head gasket.
Valves are burned or stuck - Service or replace valves.
Damaged or worn push rod - Push rod needs to be changed.
Cylinder block components are damaged - Defective components need to be replaced.
Dirty oil filter element (if equipped) - Replace or service oil filter.
| Engine using too much gasoline |
Choke doesn't open well - Adjust or replace choke cable.
Incorrect carburetor main jet adjustment - Adjust it properly.
Loose or defective spark plug - Replace or tighten spark plug.
Valves are stuck, burned, or worn - Service or change valves.
Rings, sleeve, or piston are damaged - Replace faulty components.
Valve clearance is not correct - Adjust to proper valve clearance.
Worn seals or gaskets - Install new components.
Damaged valve stems or valve guides - Change the valves.
Worn or stuck piston rings - Replace piston rings.
Cylinder liner or piston is damaged - Check piston and liner, replace as required.
Plugged breather pipe or hose - Clean or replace.
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