Kawasaki FH680V Troubleshooting
| Engine Model: Kawasaki FH680V |
| Engine Type: 4-cycle V-Twin cylinder OHV vertical shaft air-cooled gasoline |
| Total Displacement: 41.2 cu.in (675 cc) |
| Rated Engine Power: 23 Hp (17.2 kW) at 3600 rpm |
| Carburetor Type: Two-barrel with fixed main jet |
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| Engine will not start or starts up hard |
No gasoline in tank - Fill fuel up.
Incorrect fuel grade - Use quality fuel.
Fuel system clogged - Repair or replace.
Loose or disconnected spark plug wire - Check spark plug wiring connection, repair or change.
Faulty spark plug - Replace spark plug.
Clogged fuel filter - Install new filter.
Defective safety switch - Replace if required.
Carburetor malfunction - Check and repair as required.
Bad compression - Check and change damaged parts.
Unadjusted or worn throttle cable - Adjust correctly or change the cable.
Air intake screen is plugged - Wash or clean as required.
Defective ignition - Check ignition system and replace faulty parts.
Faulty or stuck throttle cable - Clean or replace the cable.
Plugged air filter - Change or clean air filter.
Fuel pump is dirty or defective - Clean or install new fuel pump.
| Engine starts but stalls immediately |
Defective spark plug - Spark plug need to be replaced.
Faulty or dirty carburetor - Carburetor needs to be replaced or cleaned.
Ignition coil is not working - Replace ignition coil as necessary.
Valve springs are bad or broken - Valve springs need to be changed.
Stuck valves - Valves must be cleaned.
Engine oil level is low - Fill up the engine oil.
Engine is overloaded - Load reducing required.
Air intake screen is blocked - Wash or clean as required.
Carburetor fuel mixture is too lean - Adjust carburetor correctly.
Wrong ignition timing - Set the ignition timing correctly.
Valve setting is improper - Valves needs to be adjusted properly.
Stale fuel - Use proper gasoline.
Engine overloaded - Load reducing required.
Low engine oil level - Check oil level and add oil as required.
Low idle speed setting is incorrect - Correct idle adjustment.
Fuel pump is defective or dirty - Check fuel pump and change if required.
Main bearings or crankshaft wear - Replace crankshaft or bearings.
Improper valve clearance - Need to adjust valve clearance.
Piston rings or cylinder bore are worn - Replace defective parts.
Carburetor is incorrectly adjusted or dirty - Clean or correctly adjust carburetor.
Plugged air filter - Service or replace air filter.
Fuel pump is defective or dirty - Test fuel pump and replace if necessary.
Defective ignition system - Inspect ignition system and change failed components.
Blown cylinder head gasket - Cylinder-head gasket replacement required.
Valves are burned or stuck - Service or change valves.
Worn or defective push rod - Replace push rod.
Faulty cylinder block parts - Change defective parts.
Dirty oil filter element (if equipped) - Replace or clean oil filter.
| Engine uses too much fuel |
Choke is not fully open - Check choke cable and adjust it.
Improper carburetor main jet adjustment - Adjust it properly.
Loose or faulty spark plug - Spark plug need to be tightened or replaced.
Stuck, worn, or burned valves - Clean or change valves.
Sleeve, rings, or piston are damaged - Replace defective components as required.
Excessive valve clearance - Adjust valve clearance.
| Engine consuming too much oil |
Damaged gaskets or seals - Worn parts need to be replaced.
Damaged valve stems or valve guides - Valves replacement required.
Seized or wear piston rings - Piston rings need to be replaced.
Scuffed cylinder liner or piston - Check piston and liner, install new parts as required.
Blocked breather hose or pipe - Change or service.
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