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| Home / Engines / Kohler Engines / Kohler CH14S |
Kohler Command CH14S Problems
| Engine Model: Kohler Command CH14S |
| Engine Type: 4-cycle 1-cylinder horizontal shaft air-cooled gasoline engine |
| Total Displacement: 24.3 cu.in (398 cc) |
| Rated Engine Power: 14 Hp (10.5 kW) at 3600 rpm |
| Fuel System: Walbro or Nikki carburetor with adjustable jet or fixed jet |
| Engine starts up hard or won't start |
Empty fuel tank - Fill fuel up.
Improper fuel grade - Use correct gasoline grade.
Air in the fuel pipes - Bleed the fuel pipes.
Faulty spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Faulty spark plug - Install new spark plug.
Clogged fuel filter - Replace fuel filter.
Brake pedal not depressed - Press the brake pedal.
Carburetor is dirty - Wash, clean and adjust.
Bad compression - Check and change damaged parts.
Throttle cable is worn or adjusted improperly - Change cable or adjust correctly.
| Irregular engine running |
Clogged cooling fins - Clean and wash as required.
Ignition failure - Inspect ignition system and change failed components.
Choke cable is defective or stuck - Replace or service the cable.
Clogged air filter - Change or clean air filter.
Fuel pump is faulty or clogged - Service or replace fuel pump.
| Engine starts but stops suddenly |
Defective spark plug - Spark plug need to be replaced.
Dirty or defective carburetor - Clean or replace carburetor.
Ignition coil is faulty - Replace ignition coil as necessary.
Weak or damaged valve springs - Valve springs need to be changed.
Valves sticking - Clean the valves.
| Engine overheating |
Engine oil level is insufficient - Fill up the oil to required level.
Engine overload - Load reducing required.
Cooling fins are blocked - Need to clean or wash.
Too lean fuel mixture in carburetor - Set the carburetor properly.
Ignition timing is incorrect - Ignition timing needs to be adjusted correctly.
Valve setting is incorrect - Set the valves properly.
| Engine noises or knocks |
Stale gasoline - Change fuel.
Engine overload - Reduce load.
Not enough engine oil - Add oil to the engine crankcase.
Low idle speed adjustment is incorrect - Correct idle adjustment.
Fuel pump is clogged or faulty - Inspect fuel pump and change as required.
Main bearings or crankshaft failure - Change defective components as required.
Incorrect valve clearance - Adjust valve clearance.
Damaged piston rings or cylinder bore - Replace defective parts.
| Engine loses power |
Carburetor is dirty or incorrectly adjusted - Clean or properly adjust carburetor.
Clogged air filter - Service or change air filter.
Dirty or faulty fuel pump - Test fuel pump and change if necessary.
Ignition system is defective - Inspect ignition system and change failed components.
Damaged cylinder-head gasket - Replace cylinder head gasket.
Stuck or burned valves - Replace or clean valves.
Worn or defective push rod - Push rod should be replaced.
Damaged cylinder block components - Defective parts need to be replaced.
Clogged oil filter (if equipped) - Change or clean oil filter.
| High fuel consumption |
Insufficient throttle opening - Adjust or replace throttle cable.
Carburetor main jet is incorrectly adjusted - Adjust main jet as required.
Loose or faulty spark plug - Re-tighten or replace spark plug.
Stuck, worn, or burned valves - Replace or service valves.
Piston, sleeve, or rings are damaged - Change faulty components.
Excessive valve clearance - Adjust to proper valve clearance.
| Engine oil consumption is too high |
Worn gaskets or seals - Worn parts need to be replaced.
Valve guides and stems are worn - Install new valves.
Piston rings are seized or worn - Change the piston rings as required.
Piston or cylinder liner is scored - Inspect piston and liner, fit new components as necessary.
Plugged breather hose or pipe - Replace or service.
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