Exmark Lazer Z CT - Manual (Page 42)

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b) Be sure the throttle control is midway between the “SLOW” and “FAST”
positions, and the choke is in the “ON” position for a cold engine or the
“OFF” position for a warm engine.
c) Make sure there is fuel in the fuel tank and that the fuel valve is open.
d) Be sure the seat switch is properly adjusted. See Section 4.2.5.
e) Make sure the parking brake is set and motion control levers are moved out
(neutral lock position).
f) Check that the PTO is disengaged.
g) Check that the spark plug wires are properly connected.
h) Check for loose or faulty wiring connections.
i) Check for corrosion at all wiring connections. Even minor corrosion may
cause a faulty connection. Clean connector terminals thoroughly with
electrical contact cleaner, apply dielectric grease and reconnect.
NOTE: When disconnecting electrical connectors DO NOT pull on the wires
to separate the connectors.
NOTE: After carefully checking the above steps, attempt to start the engine. If
it does not start, contact your authorized Exmark service dealer.
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
Will not start X X X X X X
Hard starting X X X X X X X
Stops suddenly X X X X X X X
Lacks power X X X X X X X X
Operates
erratically
X X X X X X X
Knocks or pings X X X
Skips or misfires X X X X X
Backfires X X X X X
Overheats X X X X X
High fuel
consumption
X X X X