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Kohler SV735 Troubleshooting

Engine Model: Kohler Courage SV735
Engine Type: 4-cycle V-twin cylinder gasoline engine
Total Displacement: 44.0 (725 cc)
Rated Engine Power: 26.0 Hp (19.4 kW) at 3600 rpm
Carburetor Type: One-Barrel, fixed main jet


Engine doesn't start or hard to start

Empty gas tank - Fill it up.
Low-quality gasoline - Use correct fuel grade.
Dirty fuel lines - Inspect and clean.
Faulty spark plug wire connection - Inspect spark plug wiring connection, change or repair.
Spark plug is defective - Change spark plug.
Fuel filter is dirty - Install new filter.
Defective safety switch - Replace if required.
Carburetor problems - Carburetor diagnostics required.
Low cylinder compression - Check cylinder block and replace worn parts.
Choke cable is damaged or not adjusted properly - Adjust properly or change the cable.

Engine runs irregularly

Air intake screen is plugged - Need to clean or wash.
Ignition failure - Inspect ignition system and change faulty parts.
Choke cable is faulty or stuck - Replace or service the cable.
Dirty air filter element - Clean or replace air filter.
Dirty or damaged fuel pump - Clean or change fuel pump.

Engine starts but stalls suddenly

Spark plug is defective - Change spark plug.
Carburetor is defective or dirty - Service or replace carburetor.
Faulty ignition coil - Ignition coil must be replaced.
Valve springs are weak or broken - Install new valve springs.
Valves are stuck - Clean the valves.

Engine is overheated

Engine oil insufficient - Need to add engine oil.
Engine is overloaded - Load reducing required.
Clogged cooling fins - Need to wash or clean.
Carburetor fuel mixture is too lean - Use proper settings.
Bad ignition timing - Set the ignition timing properly.
Valve setting is wrong - Valves needs to be set correctly.

Engine knocking sound or abnormal noise

Stale fuel - Use proper gasoline.
Excessive engine load - Load reducing is recommended.
Not enough engine oil - Check oil level and add oil as required.
Low idle speed adjustment is incorrect - Test and adjust.
Clogged or damaged fuel pump - Inspect fuel pump and change as required.
Crankshaft or main bearings failure - Install new parts as as required.
Incorrect valve clearance - Adjust valve clearance.
Piston rings or cylinder bore are damaged - Replace faulty components.

Loss of engine power

Incorrectly adjusted or dirty carburetor - Service or properly adjust carburetor.
Clogged air filter - Clean or replace air filter.
Dirty or defective fuel pump - Test fuel pump and change if necessary.
Ignition system malfunction - Check ignition system and replace faulty parts.
Cylinder head gasket is defective - Replace the head gasket.
Valves are burned or stuck - Clean or change valves.
Push rod is bent or worn - Change push rod.
Cylinder block components are damaged - Replace defective components.
Oil filter element is plugged (if equipped) - Replace or service oil filter.

Excessive fuel consumption

Insufficient throttle opening - Adjust or replace throttle cable.
Carburetor main jet adjustment is improper - Adjust the carburetor main jet correctly.
Spark plug is faulty or loose - Tighten or change the spark plug.
Stuck, worn, or burned valves - Clean or change valves.
Rings, sleeve, or piston are damaged - Replace faulty components.
Incorrect valve clearance - Adjust valve clearance.

Excessive engine oil consumption

Gaskets or seals are excessively worn - Replace to repair leaks.
Valve guides or stems are damaged - Valves need to be changed.
Stuck or defective piston rings - Change the piston rings as required.
Damaged piston or cylinder liner - Inspect liner and piston, fit new parts as necessary.
Breather pipe or hose is clogged - Clean or replace.