Troubleshooting - Arctic Cat Altera 300 Service Manual

3. Install the impeller with seal washer onto the water
pump shaft and tighten securely.
4. Place the water pump case into position and secure
with the four cap screws.
5. Fill the cooling system with the recommended
amount of antifreeze.

Troubleshooting

Problem: Starting impaired
Condition
1. Starter jet obstructed
2. Starter jet passage obstructed
3. Starter body - carburetor leaking air
4. Starter valve not operating properly
Problem: Idling or low speed impaired
Condition
1. Slow jet obstructed - loose
2. Slow jet outlet obstructed
3. Low speed fuel screw setting incorrect
4. Starter valve not fully closed
5. Float height incorrect
Problem: Medium or high speed impaired
Condition
1. High RPM "cut out" against RPM limiter
2. Main jet obstructed
3. Needle jet obstructed
4. Throttle vacuum piston not operating properly
5. Filter obstructed
6. Float height incorrect
7. Starter valve not fully closed
Problem: Overflow and fuel level fluctuations
Condition
1. Float valve worn - damaged
2. Float valve spring broken
3. Float not working properly
4. Float valve dirty
5. Float height too high - too low
NOTE: While the cooling system is being filled, air

pockets may develop; therefore, run the engine for
five minutes after the initial fill, shut the engine off,
and then fill the cooling system.
6. Check the entire cooling system for leakage.
Remedy
1. Clean jet
2. Clean passage
3. Tighten - adjust - replace gasket
4. Check - adjust valve
Remedy
1. Clean - tighten jet
2. Clean outlet
3. Adjust screw
4. Adjust valve
5. Adjust float height
Remedy
1. Shift into higher gear - decrease RPM speed
2. Clean main jet
3. Clean needle jet
4. Check piston operation
5. Clean filter
6. Adjust float height
7. Adjust valve
Remedy
1. Replace valve
2. Replace spring
3. Adjust float height - replace float
4. Clean valve
5. Adjust float height
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