Section 7 - Engine; Engine Troubleshooting - Gravely Rapid XZ 27hp Kohler Service Manual

Refer to the Engine Manual for specific instructions about
engine service and maintenance, oil spcifications, oil filter
part numbers, and other information.
Refer engine servicing and repair to the engine
manufacturer's local service center. It has the service
information and parts available to properly service the
engine.
NOTE: Gravely dealers should be able to test engines
and engine components to pinpoint troubles and narrow
PROBLEM
Black Exhaust
Blue/White Exhaust
Difficult Starting
Engine Cranks But Does
Not Start

SECTION 7 - ENGINE

ENGINE TROUBLESHOOTING

PROBABLE CAUSE
Restriction in air cleaner
Poor compression
Blocked fuel tank vent
Incorrect grade of fuel
Leaking cylinder head gasket
Sticking valves
Worn cylinder bores
Broken, worn, or sticking piston rings
Incorrect grade of lubricating oil
Poor compression
Leaking cylinder head gasket
Worn cylinder bores
Worn valve stem guides
Broken, worn, or sticking piston rings
Restriction in air cleaner
Low cranking speed
Cold engine oil
Controls not in correct operating position
Blocked fuel feed line
Faulty fuel lift pump
Choked fuel filter
Poor compression
Blocked fuel tank vent
Incorrect grade of fuel
Sticking valves
Worn cylinder bores
Pitted valve stems and seats
Broken, worn, or sticking piston rings
Fuel tank empty
Defective spark plug
Plugged or dirty air cleaner
Plugged or dirty fuel filter
them down to properly advise the engine service techni-
cian.
7.1 ENGINE TROUBLESHOOTING
The following troubleshooting chart is to be used to
isolate engine problems and give possible causes and
corrective action responses.
The troubleshooting guide is generic and can be used for
several types of engines. Use only those possible causes
and corrective actions that apply to the engine supplied.
Remove obstruction
Repair per instructions in manufacturer's manual
Remove obstruction
Use fuel recommended in manufacturer's manual
Replace per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Use oil recommended in manufacturer's manual
Repair per instructions in manufacturer's manual
Replace per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Remove obstruction
Check battery (see "Servicing the Battery" on page 13)
Check electrical system (see "Electrical System" on
page 54)
Warm engine oil or disconnect transmission drive belt to
increase cranking speed
Reset controls (see (see "" on page 58)
Remove obstruction
Replace pump
Clean or replace filter
Repair per instructions in manufacturer's manual
Remove obstruction
Use fuel recommended in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Repair per instructions in manufacturer's manual
Fill fuel tank
Replace spark plug (refer to Engine Manual)
Clean or replace air cleaner (refer to Engine Manual)
Clean or replace fuel filter (refer to Engine Manual)
7 - 18
CORRECTION