Ski-Doo Ski Doo MX Z 2005 [37/1429] Section 02 troubleshooting

Ski-Doo Ski Doo MX Z 2005 [37/1429] Section 02 troubleshooting
Section 02 TROUBLESHOOTING
Subsection 01 (ENGINE)
SYMPTOM ENGINE SUDDENLY TURNS OFF.
CONDITION NORMAL USE.
4. Melted and/or perforated piston dome; melted section at ring end gap.
a. When piston reaches TDC, mixture is ignited by heated areas in combustion chamber. This is due to an
incomplete combustion of a poor quality oil.
Clean residue accumulation in combustion chamber and replace piston(s). Use XP-S injection oil.
b. Spark plug heat range is too high.
Install recommended dry properly gapped spark plugs (refer to TECHNICAL DATA).
c. Ignition timing is too advanced.
Adjust according to specifications (refer to TECHNICAL DATA).
d. Inadequate fuel quality.
Useappropriatefuel.
e. Carburetion is too lean.
Adjust according to specifications (refer to TECHNICAL DATA).
5. Seized piston all around the circumference (dry surface).
a. Lack of oil, damaged oil line or defective injection pump.
Replace defective part(s).
6. Groovesonintakesideofpistononly.
a. Oil film eliminated by water (snow infiltration in engine). This can also be caused by running engine on
choke for too long. Excessive fuel will remove the oil film on the piston and make marks.
Replace piston(s) and check if intake system leaks.
7. Piston color is dark due to seizure on intake and exhaust sides.
a. Cooling system leaks and lowers coolant level.
Proceed with a leakage test (refer to COOLING SYSTEM) and repair as required. Add coolant in cooling
system until appropriate level is reached.
b. Accumulation of foreign particles in needle valve and/or main jet area.
Clean carburetor(s).
8. Cracked or broken piston(s).
a. Cracked or broken piston(s) due to excessive piston/cylinder clearance or engine over-revving.
Replace piston(s). Check piston/cylinder clearance (refer to TOP END). Adjust drive pulley according to
specifications (refer to TECHNICAL DATA) and/or clean pulley sheaves if they are contaminated with
greasy particles.
TEST/INSPECTION
9. DPM manifold air vent is obstructed.
a. Carburetion is too lean.
Ensure proper air vent.
SYMPTOM PISTON RING AND CYLINDER SURFACES ARE SCRATCHED.
CONDITION NORMAL USE.
1. Check oil quality.
a. Poor quality oil.
Use XP-S injection oil.
TEST/INSPECTION
2. Check injection pump and its hoses.
a. Inadequate injection pump adjustment and/or defective hoses.
Adjust pump according to specifications (refer to ENGINE) and/or replace hoses.
mmr2005-063 11

Содержание

Скачать