Ski-Doo Formula S 1998, Shop Manual

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Section 03 TROUBLESHOOTING
Subsection 02 (ENGINE)
03-02-6
SYMPTOM IRREGULAR ENGINE IDLE.
CONDITION NORMAL USE AFTER ENGINE WARM UP.
Test/Inspection 1. Check primer.
a. Fuel leaks at primer nipple which is mounted to carburetor.
Replace.
2. Check choke.
a. Choke plunger may be partially opened.
Readjust.
3. Check carburetor adapter.
a. Air enters through a crack.
Replace.
4. Check air screw position.
a. Inadequate fuel/air mixture.
Adjust according to specifications (refer to TECHNICAL DATA 10).
5. Check ignition system trigger coil air gap.
a. Air gap is too large.
Adjust according to specifications (refer to TECHNICAL DATA 10).
6. Check dimension of pilot jet.
a. Inadequate fuel/air mixture.
Adjust according to specifications (refer to TECHNICAL DATA 10).
7. Perform engine leak test.
a. Leaking gaskets allow air to enter in engine.
Replace defective parts.
SYMPTOM HIGH ENGINE OPERATING TEMPERATURE.
CONDITION NORMAL USE.
Test/Inspection 1. Check temperature gauge sensor.
a. False reading.
Replace.
2. Check fan belt.
a. Belt slides because it is too loose.
Adjust according to specifications (refer to TECHNICAL DATA 10).
3. Verify antifreeze level and check if there is air infiltration in the system or if
there are leaks in gasket areas.
a. Low antifreeze level or air in system.
Add antifreeze until recommended level is reached, bleed system and/or tighten
clamps at fitting.
4. Check if antifreeze flows through system properly.
a. Foreign particles and/or broken coolant pump impeller.
Clean cooling system and/or replace coolant pump impeller.
5. Check thermostat.
a. Thermostat reacts slowly or not at all.
Replace.