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Kawasaki FX751V Troubleshooting

Engine Model: Kawasaki FX751V
Engine Type: 4-cycle V-twin cylinder OHV gasoline engine
Total Displacement: 52 (852 cc)
Rated Engine Power: 24.5 Hp (18.3 kW)
Carburetor Type: Two-barrel, fixed main jet


Engine will not start or starts up hard

Gas tank is empty - Add fuel.
Improper fuel grade - Use correct gasoline grade.
Air trapped in fuel system - Bleed air.
Spark plug wiring connection is defective - Inspect spark plug wiring connection, change or repair.
Spark plug is defective - Spark plug need to be replaced.
Dirty fuel filter - Replace fuel filter.
Faulty safety switch - Change damaged switch.
Wrong carburetor adjustment - Adjusting carburetor correctly.
Bad compression - Check and change damaged parts.
Choke cable is worn or not adjusted properly - Adjust correctly or replace the cable.

Irregular engine running

Cooling fins are blocked - Clean and wash as required.
Ignition system malfunction - Inspect ignition system and change failed components.
Stuck or defective throttle cable - Change or service the cable.
Air filter element is plugged - Clean or change air filter.
Fuel pump is clogged or faulty - Inspect fuel pump and change as required.

Engine starts and then stalls

Faulty spark plug - Spark plug need to be replaced.
Carburetor is clogged or faulty - Service or repair carburetor.
Damaged ignition coil - Install a new ignition coil.
Valve springs are worn or loose - Install new valve springs.
Stuck valves - Service the valves.

Engine keeps overheating

Engine oil level is low - Need to add engine oil.
Engine overload - Reduce the load.
Cooling fins are clogged - Need to wash or clean.
Too lean fuel mixture in carburetor - Set the carburetor correctly.
Wrong ignition timing - Ignition timing needs to be set properly.
Valve setting is improper - Valves needs to be set correctly.

Engine knocking sound or abnormal noise

Low octane gasoline - Change gasoline.
Engine is running overloaded - Reduce engine load.
Not enough engine oil - Fill up the oil to required level.
Incorrectly adjusted low idle speed - Correct the settings.
Fuel pump is damaged or dirty - Service or replace fuel pump.
Crankshaft or main bearings wear - Replace crankshaft or bearings.
Valve clearance is incorrect - Adjust to proper valve clearance.
Damaged cylinder bore or piston rings - Change faulty parts.

Engine power loss

Clogged or improperly adjusted carburetor - Service or correctly adjust carburetor.
Air filter element is clogged - Clean or replace air filter.
Fuel pump is faulty or clogged - Test fuel pump and change if necessary.
Ignition system malfunction - Inspect ignition system and change failed components.
Cylinder head gasket is worn - Install new head gasket.
Valves are burned or stuck - Service or replace valves.
Damaged or worn push rod - Push rod needs to be changed.
Cylinder block parts are faulty - Replace defective components.
Oil filter is dirty (if equipped) - Change or service oil filter.

High fuel consumption

Choke did not open fully - Change or adjust choke cable.
Incorrect carburetor main jet adjustment - Adjust the carburetor main jet correctly.
Defective or loose spark plug - Tighten or replace spark plug.
Worn, stuck, or burned valves - Change or clean valves.
Sleeve, piston, or rings are damaged - Replace defective parts.
Valve clearance is not correct - Check and adjust.

High engine oil consumption

Gaskets or seals may be damaged - Change worn parts according to specifications.
Worn valve guides and valve stems - Need to replace the valves.
Seized or wear piston rings - Have piston rings replaced.
Damaged piston or cylinder liner - Check piston and liner, replace as required.
Clogged breather pipe or hose - Service or change.