Honda GXV660 Troubleshooting
| Engine Model: Honda GXV660 |
| Engine Type: 4-cycle V-twin cylinder OHV air-cooled gasoline |
| Total Displacement: 41.9 cu.in (688 cc) |
| Rated Engine Power: 21.6 Hp (16 kW) at 3600 rpm |
| Carburetor Type: Two-barrels with butterfly valve |
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| Engine hard to start or doesn't start |
No gasoline in tank - Fill it up.
Low-quality gasoline - Use correct fuel grade.
Air in the fuel pipes - Bleed the fuel pipes.
Spark plug wire is disconnected or loose - Check the spark plug wire connection, repair or replace.
Spark plug is damaged - Replace spark plug.
Fuel filter is dirty - Install new filter.
Brake pedal not depressed - Press the brake pedal.
Carburetor is not adjusted - Check carburetor float adjustment.
Poor compression - Inspect and replace wear parts.
Choke cable is not adjusted properly or worn - Change cable or adjust correctly.
| Engine runs intermittently |
Air intake grill is clogged - Wash or clean as required.
Defective ignition - Test ignition and replace failed parts.
Faulty or stuck throttle cable - Replace or clean the cable.
Air filter is blocked - Service or replace air filter.
Clogged or defective fuel pump - Test fuel pump and replace if necessary.
| Engine starts and stops immediately |
Damaged spark plug - Spark plug need to be replaced.
Dirty or faulty carburetor - Clean or replace carburetor.
Ignition coil is defective - Install a new ignition coil.
Loose or broken valve springs - Change valve springs.
Stuck valves - Service the valves.
Lack of engine oil - Check and refill engine oil.
Engine is running overloaded - Load reducing is recommended.
Clogged cooling fins - Wash or clean as required.
Carburetor is running lean - Set the carburetor properly.
Ignition timing is wrong - Adjust ignition timing correctly.
Wrong valve setting - Valves needs to be set correctly.
Low octane fuel - Change gasoline.
Engine overloaded - Reduce the load.
Low engine oil level - Need to add engine oil.
Incorrectly adjusted low idle speed - Correct idle settings.
Clogged or defective fuel pump - Test fuel pump and replace if necessary.
Crankshaft or main bearings are worn out - Repair or replace defective parts.
Improper valve clearance - Adjustment procedure required.
Piston rings or cylinder bore are damaged - Replace faulty parts.
Carburetor is incorrectly adjusted or dirty - Carburetor needs to be adjusted correctly or cleaned.
Air filter is dirty - Change or clean air filter.
Dirty or defective fuel pump - Service or change fuel pump.
Defective ignition system - Check ignition system and replace faulty parts.
Cylinder head gasket is defective - Install new head gasket.
Valves are stuck or burned - Change or service valves.
Push rod is bent or worn - Install a new push rod.
Faulty cylinder block parts - Defective parts need to be replaced.
Oil filter element is plugged (if equipped) - Change or clean oil filter.
Choke opening is not full - Replace or adjust choke cable.
Improper adjustment of carburetor main jet - Adjust it correctly.
Spark plug is defective or loose - Tighten or change the spark plug.
Valves are worn, burned or stuck - Service or change valves.
Rings, sleeve, or piston are damaged - Replace defective components.
Incorrect valve clearance - Adjust valve clearance according to specifications.
Gaskets or seals are excessively worn - Replace defective parts.
Worn valve stems and valve guides - Install new valves.
Piston rings are defective or worn - Replace piston rings.
Cylinder liner or piston is worn - Check piston and liner, change as required.
Breather hose or pipe is blocked - Service or replace.
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