Kohler 3.5CFZ, 4CZ, 5CFZ, 6.5CZ Engine Continued, Stops suddenly, Lacks power, Problem

Engine (Continued)

Problem	Possible Cause	Corrective Action
Stops suddenly	Out of fuel	Replenish
	Air intake clogged	Clean
	Fuse blown in controller	Replace fuse
	Defective seawater pump impeller	Replace
	Clogged seawater strainer	Clean strainer
	Ignition coil failure	Check for spark
	Fuel line restriction	Check fuel lines and tank
	Fuel vapor lock	Check fuel line routing
	Defective electric fuel pump	Check pump
	Dirty fuel screen	Clean fuel screen
	Faulty spark plug(s)	Replace spark plug(s)
	No/low oil pressure	Check oil pressure and pump
	Defective low oil pressure (LOP) safety	Check LOP shutdown switch
	shutdown switch
	High temperature shutdown	Check engine coolant system
	Defective high exhaust temp. (HET) and/or	Check HET and HWT shutdown switch(es)
	high water temp. (HWT) safety shutdown
	switch(es)
	Loss of AC output	See authorized Kohler service
		dealer/distributor
	Faulty antidieseling solenoid	Replace solenoid
Lacks power	Air intake clogged	Clean
	Bad or stale fuel	Replace fuel
	Faulty spark plug(s)	Replace (and regap) plug(s)
	Improper timing	Check timing
	Choke solenoid defective	Check and/or change
	Engine not operating at rated RPM	Check governor
	Governor adjustments incorrect	Adjust governor
	Carbon build-up	Clean carbon from cylinder heads
	Improper cooling	Inspect cooling system
	Dirty fuel screen	Clean screen
	Defective ignition coil	Replace coil
	Fuel line restricted	Check fuel lines
	Engine overloaded	Reduce load
	Carburetor adjustment wrong	Adjust carburetor
Operates erratically	Air intake clogged	Clean
	Stale or bad fuel	Replace fuel
	Fuel pump vapor lock	Allow unit to cool and attempt restart
	Clogged fuel screen	Clean screen
	Faulty spark plug(s)	Replace spark plug(s)
	Carburetor adjustment incorrect	Adjust carburetor

4-2 Troubleshooting TP-5695 12/93