Exmark FMD604 Operator's Manual page 42

h) Check for loose or faulty wiring connections. If it is necessary to disconnect wire
connectors, Do Not pull on the wires.
i) Check for corrosion at all wiring connections. Even minor corrosion may cause a
faulty connection. Clean connector terminals thoroughly, apply dielectric grease
and reconnect.
IMPORTANT: It is essential that all operator safety mechanisms be connected
and in proper operating condition prior to mower use.
NOTE: After carefully checking the above steps, attempt to start the engine. If it does
not start, contact your authorized Exmark service dealer.
When a problem occurs, do not overlook the simple causes. For example, starting
problems could be caused by an empty fuel tank. The following tables list some of the
common causes of trouble. Do not attempt to service or replace major items or any
items that call for special timing or adjustment procedures (such as valves, governor,
etc.). Have this work done by your Engine Service Dealer.
NO
PROBLEM
FUEL
X
Will not start
X
Hard starting
X
Stops suddenly
Lacks power
Operates erratically
Knocks or pings
Skips or misfires
Backfires
Overheats
High fuel
consumption
ENGINE TROUBLESHOOTING
ENGINE TROUBLESHOOTING TABLE
IMPROPER DIRT IN DIRTY AIR
FUEL FUEL LINE FILTER
X X
X X X
X X
X X X
X X X
X
X X X
X X
X X
X
- 37 -
FAULTY BLOCKED
ENGINE
SPARK FUEL
OVERLOADED
PLUG FILTER
X X X
X X X
X X
X X X
X X X
X
X
X X
X
X X
INCORRECT DIRTY
OIL AIR
LEVEL SCREEN
X X
X X
X
X
X
X
X X
X