Troubleshooting - Exmark VIKING 408 Operator's Manual

Troubleshooting

Troubleshooting
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.
Note: When disconnecting electrical connectors Do Not pull on the wires to separate the connectors.
Problem
Engine will not start, starts hard, or fails to
keep running.
Engine loses power
Engine overheats
Possible Cause
1. Fuel tank is empty.
2. Fuel shutoff valve is closed.
3. The throttle and choke are not in the
correct position.
4. Dirt in fuel filter.
5. Dirt, water, or stale fuel is in the fuel
system.
6. Air cleaner is dirty.
7. Electrical connections are corroded, loose
or faulty.
8. Relay or switch is defective.
9. Faulty spark plug.
10. Spark plug wire is not connected.
11. PTO is engaged.
12. Speed control lever is not in neutral
position.
13. OPC levers are released.
1. Engine load is excessive
2. Air cleaner is dirty.
3. Oil level in the crankcase is low.
4. Cooling fins and air passages for the
engine are plugged.
5. Vent hole in the fuel cap is plugged.
6. Dirt in fuel filter.
7. Dirt, water, or stale fuel is in the fuel
system.
1. Engine load is excessive
2. Oil level in the crankcase is low.
3. Cooling fins and air passages for the
engine are plugged.
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Corrective Action
1. Fill the fuel tank.
2. Open the fuel shutoff valve.
3. 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.
4. Replace the fuel filter.
5. Contact an Authorized Service Dealer.
6. Clean or replace the air cleaner element.
7. Check the electrical connections for
good contact. Clean connector terminals
thoroughly with electrical contact cleaner,
apply dielectric grease and reconnect.
8. Contact an Authorized Service Dealer.
9. Clean, adjust or replace spark plug.
10. Check the spark plug wire connection.
11. Disengage the PTO.
12. Ensure the shifter lever is in the neutral
position.
13. Depress OPC levers.
1. Reduce the ground speed.
2. Clean or replace the air cleaner element.
3. Add oil to the crankcase.
4. Remove the obstructions from the
cooling fins and air passages.
5. Clean or replace the fuel cap.
6. Replace the fuel filter.
7. Contact an Authorized Service Dealer.
1. Reduce the ground speed.
2. Add oil to the crankcase.
3. Remove the obstructions from the
cooling fins and air passages.