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| Home / Engines / Kohler Engines / Kohler CV15S |
Kohler Command CV15S Problems
| Engine Model: Kohler Command CV15S |
| Engine Type: 4-cycle 1-cylinder vertical shaft air-cooled gasoline engine |
| Total Displacement: 26 cu.in (426 cc) |
| Rated Engine Power: 15 Hp (11.2 kW) at 3600 rpm |
| Fuel System: Float carburetor with fixed main jet |
| Engine doesn't start or hard to start |
Empty fuel tank - Fill gasoline up.
Wrong fuel grade - Change fuel.
Dirt and debris in fuel system - Remove debris and dirt.
Faulty spark plug wire connection - Inspect spark plug wiring connection, change or repair.
Defective spark plug - Change spark plug.
Dirty fuel filter - Change fuel filter.
Brake pedal not depressed - Press the brake pedal.
Incorrect carburetor adjustment - Adjust carburetor idle mixture screw.
Weak cylinder compression - Inspect cylinder block and change worn parts.
Throttle cable is adjusted incorrectly or damaged - Adjust properly or change the cable.
| Rough engine running |
Plugged cooling fins - Need to wash or clean.
Ignition system problems - Check ignition system and replace faulty parts.
Choke cable is stuck or faulty - Service or change the cable.
Plugged air filter - Replace or clean air filter.
Fuel pump is dirty or defective - Clean or change fuel pump.
| Engine starts but then stalls |
Spark plug is defective - Replace spark plug.
Faulty or dirty carburetor - Clean or replace carburetor.
Defective ignition coil - Install a new ignition coil.
Bad or broken valve springs - Install new valve springs.
Valves are stuck - Valves must be cleaned.
| Engine overheats |
Engine oil level is insufficient - Fill the crankcase with engine oil.
Engine overload - Load reducing required.
Air intake grill is clogged - Need to wash or clean.
Too lean fuel mixture in carburetor - Adjust carburetor properly.
Ignition timing is wrong - Ignition timing needs to be set properly.
Improper valve setting - Adjust valves correctly.
| Engine noises or knocks |
Low octane fuel - Change gasoline.
Engine overload - Reduce the load.
Insufficient engine oil - Check oil level and add oil as required.
Low idle speed set incorrectly - Correct idle adjustment.
Dirty or defective fuel pump - Service or replace fuel pump.
Main bearings or crankshaft failure - Install new parts as as required.
Improper valve clearance - Check and adjust.
Damaged cylinder bore or piston rings - Replace faulty components.
| Engine lacks power |
Carburetor is improperly adjusted or clogged - Clean or correctly adjust carburetor.
Air filter element is clogged - Change or service air filter.
Fuel pump is dirty or defective - Clean or replace fuel pump.
Ignition failure - Inspect ignition system and change faulty parts.
Cylinder head gasket is damaged - Replace cylinder head gasket.
Burned or stuck valves - Replace or service valves.
Worn or damaged push rod - Change push rod.
Worn cylinder block components - Replace defective parts as required.
Oil filter element is clogged (if equipped) - Service or replace oil filter.
| Engine using too much gasoline |
Throttle did not open fully - Replace or adjust throttle cable.
Improper adjustment of carburetor main jet - Adjust main jet as required.
Loose or defective spark plug - Change or re-tighten spark plug.
Burned, worn, or stuck valves - Clean or change valves.
Piston, sleeve, or rings are damaged - Change faulty parts.
Valve clearance is wrong - Adjust to proper valve clearance.
| Engine using too much oil |
Damaged gaskets or seals - To repair leaks, replace worn parts.
Worn valve guides and valve stems - Need to replace the valves.
Worn or stuck piston rings - Install new piston rings.
Scuffed piston or cylinder liner - Check liner and piston, replace as required.
Clogged breather hose or pipe - Replace or service.
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