________________________________________________________________________________________

Home / Engines / Kohler Engines / Kohler CH15S

Kohler Command CH15S Problems

Engine Model: Kohler Command CH15S
Engine Type: 4-cycle 1-cylinder horizontal shaft air-cooled gasoline engine
Total Displacement: 26 cu.in (426 cc)
Rated Engine Power: 15 Hp (11.5 kW) at 3600 rpm
Fuel System: Walbro or Nikki carburetor with adjustable jet or fixed jet

Engine difficult to start or will not start

Gas tank is empty - Fill gasoline up.
Wrong fuel grade - Use quality gasoline.
There is air in the fuel system - Bleed the system.
Defective spark plug wire connection - Inspect the spark plug wire connection, replace or repair.
Spark plug is damaged - Change spark plug as required.
Plugged fuel filter - Change fuel filter.
Faulty safety switch - Change damaged switch.
Carburetor is not adjusted - Check carburetor float adjustment.
Bad compression - Check and change damaged parts.
Damaged or not adjusted choke cable - Adjust correctly or replace the cable.

Engine runs irregularly

Cooling fins are plugged - Wash or clean as required.
Ignition system failure - Check ignition system and replace faulty parts.
Throttle cable is stuck or faulty - Service or replace the cable.
Dirty air filter element - Change or clean air filter.
Dirty or damaged fuel pump - Check fuel pump and replace if necessary.

Engine starts and then shuts off

Spark plug is damaged - Change spark plug as required.
Carburetor is dirty or defective - Clean or replace carburetor.
Defective ignition coil - Replace ignition coil as necessary.
Worn or loose valve springs - Replace valve springs.
Valves are stuck - Valves must be cleaned.

Engine is overheated

Not enough engine oil - Check and refill engine oil.
Engine overload - Reduce load.
Plugged cooling fins - Need to wash or clean.
Carburetor is running lean - Adjust carburetor properly.
Ignition timing is improper - Ignition timing needs to be set properly.
Wrong valve setting - Adjust valves correctly.

Abnormal engine knocking or noise

Stale gasoline - Use correct fuel.
Engine overloaded - Reduce engine load.
Low engine oil level - Check and refill engine oil.
Too low idle RPM - Need to adjust idle speed.
Clogged or damaged fuel pump - Inspect fuel pump and change as required.
Crankshaft or main bearings are worn out - Repair or replace defective parts.
Valve clearance is improper - Adjust to proper valve clearance.
Piston rings or cylinder bore are damaged - Replace defective parts.

Engine loses power

Improperly or clogged carburetor - Adjust the carburetor correctly or clean it.
Dirty air filter element - Clean or replace air filter.
Fuel pump is faulty or clogged - Clean or install new fuel pump.
Ignition system failure - Check ignition system and replace faulty parts.
Cylinder head gasket is defective - Install new cylinder head gasket.
Valves are burned or stuck - Clean or replace valves.
Push rod is worn or defective - Push rod should be replaced.
Cylinder block parts are worn out - Replace defective components as required.
Oil filter element is clogged (if equipped) - Change or clean oil filter.

Engine uses too much fuel

Choke doesn't open well - Adjust or replace choke cable.
Improper adjustment of carburetor main jet - Adjust the carburetor main jet correctly.
Spark plug is faulty or loose - Tighten or change the spark plug.
Stuck, worn, or burned valves - Service or change valves.
Sleeve, rings, or piston are damaged - Change defective parts.
Valve clearance is incorrect - Adjustment procedure required.

Excessive oil consumption

Worn seals or gaskets - To repair leaks, replace worn parts.
Valve guides or stems are damaged - Install new valves.
Worn or stuck piston rings - Replace piston rings.
Damaged piston or cylinder liner - Check piston and liner, replace as required.
Plugged breather hose or pipe - Replace or clean.

________________________________________________________________________________________

________________________________________________________________________________________

Engines Technical Specifications
BRIGGS 28S777 BRIGGS 31H777 BRIGGS 31P977 BRIGGS 31Q777
HONDA GC135 HONDA GCV160 HONDA GS190 HONDA GX340
KOHLER CH18S KOHLER CH680 KOHLER CV460S KOHLER SV735S
KUBOTA D1305 KUBOTA D1503 KUBOTA V1903 KUBOTA 2003T
MERCURY 150 MERCURY 175 XRI MARINER 135 MERCURY 200 EFI
KAWASAKI FH430V KAWASAKI FR600V KAWASAKI FX541V KAWASAKI FD611V
BMW M20B23 BMW M40B18 BMW M43B16 BMW M50B24TU
TOYOTA 3VZ-E TOYOTA 1AZ-FE TOYOTA 1G-FE TOYOTA 1JZ-GE
NISSAN HR12DE NISSAN A12 NISSAN A15 NISSAN CA18DET