Exmark Laser Z - 7.4 ENGINE ERROR CODES

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IMPORTANT: It is essential that all operator safety mechanisms be
connected and in proper operating condition prior to mower use.
When a problem occurs, do not overlook the simple causes. For example,
starting problems could be caused by an empty fuel tank.
The following table lists some of the common causes of trouble. Do not attempt
to service or replace major items or any items that call for special timing of
adjustments procedures (such as valves, governor, etc.). Have this work done
by your Engine Service Dealer.
ENGINE TROUBLESHOOTING TABLE
PROBLEM
NO
FUEL
IMPROPER
FUEL
DIRT IN
FUEL LINE
DIRTY AIR
FILTER
FAULTY
SPARK
PLUG
ENGINE
OVERLOADED
BLOCKED
FUEL
FILTER
INCORRECT
OIL
LEVEL
DIRTY
AIR
SCREEN
INSUFFICIENT
BATTERY
CHARGE
Will not start
XXXXXX X
Hard starting
XX X X X X X
Stops suddenly
XXX XXX
X
Lacks power
XXXX X X X
X
Operates erratically
XXXX X X
X
Knocks or pings
XX
X
Skips or misfires
XXXX
X
Backfires
XXX X
X
Overheats*
XX X X
X
High fuel
consumption
XX X
X
* On Kawasaki Liquid Cooled units check for dirty radiator core.
7.4 ENGINE ERROR CODES – KOHLER 26 HP EFI UNITS ONLY
7.4.1 Electronic Control Unit Malfunction Indicator
The electronic control unit (ECU) continuously monitors operation of the EFI
system. If a problem or fault within the system is detected, the malfunction
indicator light (MIL) is illuminated. The MIL is the red light located on the control
console between the key switch and the throttle controls. Follow the
troubleshooting steps outlined in the Kohler engine operator’s manual if the MIL is
illuminated.