Ski-Doo FORMULA III, Shop Manual

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Section 03 TROUBLESHOOTING
Sub-Section 01 (ENGINE)
03-01-4
SYMPTOM ENGINE DOES NOT OFFER MAXIMUM POWER AND / OR DOES NOT REACH
MAXIMUM OPERATING RPM.
CONDITION NORMAL USE.
Test / Inspection 1. Check spark plug condition.
a.Fouled spark plug(s).
Replace.
2. Check if there is water in fuel.
a.There is water in fuel.
Drain fuel system, then fill it with appropriate fuel.
3. Check items listed in “Engine runs out of fuel” (refer to FUEL AND OIL SYS-
TEM sub-section 02).
4. Check carburetor adjustments and cleanliness.
a.Inadequate carburetor adjustments or dirt accumulation.
Adjust according to specifications (refer to TECHNICAL DATA 10) or clean.
5. Check drive belt.
a.Worn belt.
Replace belt if width is 3 mm (1/8”) less than nominal dimension (refer to TECH-
NICAL DATA 10).
6. Check track adjustment.
a.Too much tension and / or improper alignment.
Align track and adjust its tension to specifications (refer to TECHNICAL DATA 10).
7. Check drive pulley.
a.Improper calibration screw adjustments (TRA pulley) and / or worn bushing(s).
Adjust according to specifications (refer to TECHNICAL DATA 10) and / or replace
bushing(s).
8. Check driven pulley.
a.Worn bushing and / or spring tension.
Replace spring and / or adjust its tension according to specifications (refer to
TECHNICAL DATA 10).
9. Check exhaust system.
a.Restriction.
Replace.
10. Check ignition timing.
a.Decrease in power due to retarded ignition.
Adjust according to specification (refer to TECHNICAL DATA 10).
11.Check engine compression.
a. Worn piston(s) and ring(s).
Replace (refer to TECHNICAL DATA 10 for specification).
12.Check engine cooling system.
a.Engine overheats. Improper fan belt tension.
Adjust fan belt (refer to TECHNICAL DATA 10).
b.Antifreeze level is low, cap fails to pressurize system or air circulates through
lines.
Adjust level, replace cap or bleed cooling system.