Ski-Doo REV Series Shop Manual

Section 03 TROUBLESHOOTING
Subsection 01 (ENGINE)
ENGINE
The following chart is provided to help diagnose the probable source of troubles. It should be used as a
guideline. Some causes or corrections may not apply to a specific model.
NOTE: For engine management system troubleshooting, refer to appropriate subsection.
SYMPTOM ENGINE BACKFIRES.
CONDITION NORMAL USE.
1. Check spark plugs.
a. Carbon accumulation caused by defective spark plug(s).
Clean carbon accumulation from piston and cylinder head and install dry properly gapped spark plug(s).
2. Check ignition timing.
a. Timing is too advanced.
Set timing according to specifications (refer to TECHNICAL DATA).
3. Check for erratic sparks.
a. Poor electrical connections.
Repair.
b. Faulty stator.
Replace defective parts.
4. Check carburetor.
a. Fuel passages obstructed.
Clean carburetor and install new filter(s).
b. Fuel level too low.
Adjust float level according to specifications.
TEST/INSPECTION
5. Check cooling system.
a. Low antifreeze level.
Adjust antifreeze level. Proceed with a leakage test (refer to LIQUID COOLING SYSTEM) and repair as
required.
b. Defective tank cap.
Replace cap.
c. Defective thermostat.
Replace thermostat.
d. Air in system.
Bleed system.
SYMPTOM ENGINE SUDDENLY TURNS OFF AT HIGH RPM AND/OR WITH LIGHT LOAD.
CONDITION NORMAL USE.
TEST/INSPECTION 1. Check that all 3 ground wires are well connected.
mmr2004-Rev 37

Ski-Doo REV Series Specifications

General

Chassis	REV
Track Width	15 in
Fuel Capacity	10.6 gal
Seating Capacity	1
Reverse	Available on most models
Electric Start	Available on most models