Section 4. Troubleshooting; Engine - Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Operating And Installation Manual

Section 4. Troubleshooting

When troubles occur, do not overlook simple causes. A
starting problem, for example, could be caused by
improper fuel or an empty fuel tank. The following charts
list some common problems. If procedures in this
manual do not explain how to correct the problem, take
Problem
Unit will not crank Unit will not crank
Unit cranks but will Unit cranks but will
not start not start not start
Engine starts, but Engine starts, but
does not continue to does not continue to does not continue to
run after start switch run after start switch
is released
Hard starting Hard starting
TP-5695 12/93
Possible Cause
Weak or dead battery
Reversed or poor battery connections.
Poor ground.
Fuse blown in controller
Defective start/stop switch
Defective starter solenoid
Defective starter
Out of fuel
Clogged fuel screen
Faulty antidieseling solenoid
Air intake clogged
Faulty spark plug(s)
Loose spark plug connection
Faulty ground (--) connection
Carburetor adjustment wrong
Defective electric fuel pump
Shorted or open ignition coil
Weak or dead battery
Bad fuel mixture
Flooded carburetor
Engine malfunction
No generator output voltage
No/low oil pressure
Defective low oil pressure (LOP) safety
shutdown switch
High temperature shutdown
Defective high exhaust temp. (HET) and/or
high water temp. (HWT) safety shutdown
switch(es)
Stale or bad fuel
Fuel vapor lock
Faulty spark plug(s)
Weak ignition coil
Carburetor adjustment wrong
Air intake clogged
the generator
dealer/distributor. Tell the dealer exactly what happened
when the problem occurred and of any adjustments
made to the set.

Engine

Recharge or replace battery
Check connections
Replace fuse
Check function, replace as necessary.
Check starter solenoid and wiring. Replace
as necessary.
Attempt starting by direct connection to
battery. Replace/repair as necessary.
Replenish
Clean fuel screen
Replace solenoid
Clean or replace
Replace (and regap) spark plug(s)
Reconnect wires
Clean and retighten
Adjust carburetor
Check pressure. Replace as necessary.
Replace coil
Recharge or replace
Replace fuel; clean carburetor
Wait a few minutes and attempt restart
See authorized Kohler service
dealer/distributor
Check AC voltage
Check oil pressure and pump
Check LOP shutdown switch
Check cooling system
Check HET and/or HWT shutdown
switch(es)
Replace fuel
Check fuel line routing
Replace (and regap) plug(s)
Replace
Adjust carburetor
Clean
set to an authorized
Corrective Action
Troubleshooting 4-1
service