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 | IMPROPER | DIRT IN | DIRTY AIR | FAULTY | ENGINE | BLOCKED | INCORRECT | DIRTY | INSUFFICIENT | |
SPARK | FUEL | OIL | AIR | BATTERY | |||||||
FUEL | FUEL | FUEL LINE | FILTER | OVERLOADED | |||||||
|
|
|
|
| PLUG |
| FILTER | LEVEL | SCREEN | CHARGE | |
Will not start | X |
| 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 |
|
|
| X | X | X |
|
| X |
| |
consumption |
|
|
|
|
|
| |||||
|
|
|
|
|
|
|
|
|
|
7.4ENGINE WARNING SYSTEMS
For Kohler EFI Units Only:
7.4.1Electronic 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.
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