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Kawasaki FD750D Troubleshooting

Engine Model: Kawasaki FD750D
Engine Type: 4-cycle 2-cylinder liquid cooled gasoline engine
Total Displacement: 45.5 (745 cc)
Rated Engine Power: 27 Hp (20.2 kW)
Carburetor Type: Float, fixed main jet


Engine is not starting or hard starting

No gasoline in tank - Add gasoline.
Low-quality gasoline - Change fuel.
Clogged fuel system - Remove clogging.
Damaged spark plug wiring connection - Inspect the spark plug wire connection, replace or repair.
Defective spark plug - Replace spark plug.
Fuel filter is clogged - Install new filter.
Faulty safety switch - Change damaged switch.
Carburetor problems - Carburetor diagnostics required.
Low compression - Check and replace worn parts.
Unadjusted or worn throttle cable - Change cable or adjust correctly.

Engine runs unevenly

Cooling fins are blocked - Need to wash or clean.
Ignition system failure - Inspect ignition system and change failed components.
Throttle cable is faulty or stuck - Replace or service the cable.
Air filter element is clogged - Replace or service air filter.
Dirty or damaged fuel pump - Inspect fuel pump and change as required.

Engine starts but immediately stops

Spark plug is defective - Spark plug need to be replaced.
Dirty or faulty carburetor - Clean or replace carburetor.
Faulty ignition coil - Replace ignition coil as necessary.
Weak or damaged valve springs - Replace valve springs.
Valves sticking - Valves need to be cleaned.

Engine is overheated

Not enough engine oil - Check and refill engine oil.
Excessive engine load - Reduce load.
Cooling fins are plugged - Need to wash or clean.
Carburetor mixture is too lean - Set the carburetor properly.
Improper ignition timing - Ignition timing needs to be adjusted correctly.
Valve setting is incorrect - Adjust valves correctly.

Abnormal engine noise or knocking

Stale fuel - Use proper gasoline.
Engine overload - Load reducing required.
Insufficient engine oil - Fill the crankcase with engine oil.
Low idle speed set incorrectly - Correct idle adjustment.
Dirty or faulty fuel pump - Service or change fuel pump.
Worn main bearings or crankshaft - Have bearings or crankshaft replaced.
Improper valve clearance - Need to adjust valve clearance.
Damaged cylinder bore or piston rings - Replace faulty components.

Loss of engine power

Dirty or incorrectly adjusted carburetor - Clean or correctly adjust carburetor.
Air filter element is plugged - Clean or replace air filter.
Fuel pump is damaged or dirty - Test fuel pump and replace if necessary.
Defective ignition system - Test ignition and replace failed parts.
Worn cylinder head gasket - Change cylinder head gasket.
Stuck or burned valves - Clean or change valves.
Worn or defective push rod - Replace push rod.
Cylinder block parts are damaged - Replace defective components as required.
Oil filter element is clogged (if equipped) - Change or service oil filter.

Excessive fuel consumption

Throttle does not open well - Inspect throttle cable and adjust it.
Carburetor main jet adjustment is improper - Adjust main jet as required.
Loose or defective spark plug - Change or re-tighten spark plug.
Valves are worn, burned or stuck - Replace or clean valves.
Sleeve, rings, or piston are damaged - Replace faulty parts as required.
Valve clearance is wrong - Adjustment procedure required.

Excessive engine oil consumption

Damaged seals or gaskets - Replace defective parts.
Valve guides or stems are damaged - Replace the valves.
Worn or broken piston rings - Replace piston rings.
Scuffed cylinder liner or piston - Check piston and liner, change as required.
Breather hose or pipe is blocked - Change or clean.