Ski-Doo Ski Doo MX Z 2005 [892/1429] Engine equipped with rave valve does not reach its full operat ing rpm 500 to 1000 rpm slower

Section 02 TROUBLESHOOTING GUIDE

Subsection 01 (ENGINE (2-STROKE))

Symptom: HIGH ENGINE OPERATING TEMPERATURE (LIQUID COOLED ENGINES).

1. Check temperature gauge sensor.

- False reading. Check terminal connections. If problem persists, replace sensor.

2. Check if heat exchangers are clean.

- Dirty heat exchangers. Clean heat exchangers.

3. Check coolant level and check if there is air infiltration in the system or if there are leaks in

gasket areas.

- Low coolant level or air in system. Add coolant until recommended level is reached, bleed sys-

tem and/or tighten clamps.

4. Check if coolant flows through system properly.

- Foreign particles and/or broken coolant pump impeller. Clean cooling system and/or replace

coolant pump impeller.

5. Check thermostat.

- Thermostat reacts slowly or not at all. Replace.

6. Check antifreeze concentration.

- Antifreeze concentration is too high. Adjust concentration according to BRP recommendations.

7. Check tank cap.

- Cap does not hold pressure. Replace.

8. Check carburetion.

- Improperly adjusted or inadequate carburetor components. Adjust according to specifications

(refer to TECHNICAL DATA) or replace inadequate component(s).

9. Check cylinder head gaskets.

- Worn gaskets. Replace.

10. Check ignition timing.

- Ignition timing is too advanced. Adjust according to specifications (refer to TECHNICAL DATA).

11. Check if there are leaks at air intake silencer and/or engine crankcase.

- Leak(s). Repair or replace.

12. Check condition and heat range of spark plugs.

- Melted spark plug tip or inadequate heat range. Replace.

Symptom: ENGINE EQUIPPED WITH RAVE VALVE DOES NOT REACH ITS FULL OPERAT-

ING RPM (500 TO 1000 RPM SLOWER).

1. Check RAVE valve pistons.

- Valve piston(s) is (are) not screwed to the bottom. Screw valve piston(s) to bottom.

2. Check that valve moves freely.

- Valve stuck in closed position. Clean.

3. Check RAVE valve stems.

- Bent RAVE valve stem(s). Replace.

4. Check RAVE valves.

- Jammed valve(s). Clean.

14 mmr2005-005