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| Home / Engines / Kohler Engines / Kohler CH18S |
Kohler Command CH18S Problems
| Engine Model: Kohler Command CH18S |
| Engine Type: 4-cycle V-twin cylinder horizontal shaft gasoline engine |
| Total Displacement: 38.0 cu.in (624 cc) |
| Rated Engine Power: 18 Hp (13.4 kW) at 3600 rpm |
| Fuel System: One-barrel carburetor with fixed main jet |
| Engine hard starting or not starting |
Empty gas tank - Add fuel.
Wrong grade of gasoline - Use quality fuel.
Fuel system clogged - Repair or replace.
Defective wiring connection of spark plug - Check spark plug wiring connection, repair or change.
Spark plug is defective - Spark plug need to be replaced.
Plugged fuel filter - Fuel filter needs to be replaced.
Brake pedal not depressed - Press the brake pedal.
Carburetor components worn out - Repair or replace parts.
Bad engine compression - Inspect cylinder block and replace worn components.
Not adjusted or damaged throttle cable - Adjust correctly or change the cable.
| Engine runs roughly |
Air intake grill is clogged - Need to clean or wash.
Defective ignition - Check ignition and replace faulty components.
Faulty or stuck choke cable - Change or service the cable.
Air filter is blocked - Change or service air filter.
Fuel pump is dirty or defective - Service or change fuel pump.
| Engine starts but then stops |
Damaged spark plug - Spark plug need to be replaced.
Carburetor is dirty or faulty - Service or repair carburetor.
Defective ignition coil - Install a new ignition coil.
Weak or damaged valve springs - Change valve springs.
Valves sticking - Valves must be cleaned.
| Engine overheated |
Not enough engine oil - Add oil to the engine crankcase.
Excessive engine load - Reduce load.
Plugged cooling fins - Need to clean or wash.
Carburetor is running lean - Set the carburetor correctly.
Improper ignition timing - Adjust ignition timing correctly.
Incorrect valve setting - Adjust valves as required.
| Engine noise or knocking |
Low octane fuel - Use correct gasoline.
Engine is running overloaded - Load reducing is recommended.
Not enough engine oil - Need to add engine oil.
Low idle speed adjustment is incorrect - Adjustment required.
Fuel pump is damaged or dirty - Check fuel pump and replace if necessary.
Main bearings or crankshaft wear - Change defective components as required.
Excessive valve clearance - Adjustment procedure required.
Damaged piston rings or cylinder bore - Replace defective components.
| Lack of engine power |
Carburetor is improperly adjusted or dirty - Adjust carburetor properly or service it.
Air filter is dirty - Replace or service air filter.
Fuel pump is damaged or dirty - Test fuel pump and change if necessary.
Ignition system malfunction - Check ignition and replace faulty components.
Blown cylinder head gasket - Install new head gasket.
Burned or stuck valves - Clean or replace valves.
Push rod is worn or bent - Install a new push rod.
Worn cylinder block components - Replace defective parts as required.
Oil filter is dirty (if equipped) - Replace or service oil filter.
| High fuel consumption |
Throttle did not open fully - Replace or adjust throttle cable.
Carburetor main jet is improperly adjusted - Adjust it properly.
Spark plug is loose or defective - Tighten or change the spark plug.
Stuck, burned, or worn valves - Change or clean valves.
Worn rings, piston, or sleeve - Replace faulty parts.
Excessive valve clearance - Adjust valve clearance according to specifications.
| Engine oil consumption is too high |
Gaskets or seals can be faulty - Worn parts need to be replaced.
Worn valve guides and valve stems - Valves must be replaced.
Seized or wear piston rings - Replace piston rings.
Piston or cylinder liner is damaged - Check liner and piston, replace as required.
Plugged breather hose or pipe - Change or clean.
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