Kohler 15/20CCO Administrator's Manual For Operation And Installation page 44

Problem
Engine emits black or Engine emits black or
gray exhaust smoke gray exhaust smoke
Engine emits white or Engine emits white or
blue smoke blue smoke
Low lube oil pressure Low lube oil pressure
High lube oil High lube oil
consumption consumption
High fuel consumption Incorrect type of fuel
High fuel consumption
TP-5605 4/97
Engine (continued)
Possible Cause
Fuel filter clogged
Overload
Incorrect type of fuel
Clogged or dirty air cleaner
Defective injection pump
Faulty injectors
Incorrect fuel injection timing
Incorrect valve clearance
Lube oil level too high
Incorrect lube oil
Excessive engine oil
Piston ring and liner worn
Incorrect injection timing
Incorrect compression
Low lube oil level
Incorrect lube oil viscosity
Defective lube oil pump
Defective oil pressure switch
Worn engine components
Too light viscosity oil
Oil leaks
Incorrect type of oil
Clogged breather system
Defective piston ring, piston cylinder liner, valve
guide, or valve seat
Clogged or dirty air cleaner element
Engine overloaded
Incorrect valve clearance
Incorrect fuel injection timing
Low engine temperature
Incorrect compression
Fuel leakage
Corrective Action
Clean or change
Reduce load
Use correct fuel
Service air cleaner element
See authorized service distributor/dealer
See authorized service distributor/dealer
See authorized service distributor/dealer
See authorized service distributor/dealer
Drain out surplus
Use correct viscosity (see Oil Selection)
Reduce to specified level
See authorized service distributor/dealer
See authorized service distributor/dealer
See authorized service distributor/dealer
Add lube oil
Drain, fill with correct viscosity oil
See authorized service distributor/dealer
Replace switch
Rebuild— consult engine service manual
Use correct viscosity oil (see oil selection)
Check for leaks in lines, around gaskets, and
drain plug
Use oil of correct viscosity
Clean breather system
See authorized service distributor/dealer
Use correct fuel (see Fuel Specifications)
Service air cleaner element
Reduce load
See authorized service distributor/dealer
See authorized service distributor/dealer
Check thermostat
See authorized service distributor/dealer
Check for leaks at fuel tank, lines, and engine
fuel system
Troubleshooting 4-3