Engine General - BRP BOMBARDIER DS250 2006 Shop Manual

BELT SIDES WORN CONCAVE.
Symptom:
2. Check drive belt identification number.
-
Unspecified type of belt. Replace belt with an appropriate drive belt (refer to TECHNICAL SPEC-
IFICATIONS).
BELT DISINTEGRATION.
Symptom:
1. Check drive belt identification number.
-
Excessive belt speed. Using unspecified type of belt. Replace belt with proper type of belt (refer
to TECHNICAL SPECIFICATIONS).
2. Check if pulley sheaves are clean.
-
Oil on pulley surfaces. Clean pulley surfaces with fine emery cloth and wipe clean using pulley
flange cleaner (P/N 413 711 809) and a cloth.
FLEX CRACKS BETWEEN COGS.
Symptom:
1. Check drive belt condition.
-
Considerable use, belt wearing out. Replace.

ENGINE GENERAL

ENGINE BACKFIRES.
Symptom:
1. Check spark plug and/or electrical system.
-
Carbon accumulation caused by defective spark plug. Clean carbon accumulation and replace
spark plug.
-
Electrical system failure. Replace defective part(s).
2. Check leakage on intake manifold.
-
Air leak on intake system. Retighten screws and/or replace intake manifold.
3. Check exhaust air leaking.
-
Exhaust gasket is leaking. Retighten screws and/or replace exhaust gasket.
4. Check intake valve(s) for leaking.
-
Intake valve(s) is (are) leaking. Repair or replace valve(s).
5. Check if fuel supply is to less at high RPM.
-
Fuel line is contaminated and/or bent (engine gets lean). Clean and/or replace defective part(s).
ENGINE SUDDENLY TURNS OFF.
Symptom:
1. Check condition of spark plug (blue spark ideal).
-
Red, jumping spark means a damaged spark plug. Replace spark plug with appropriate heat
range (refer to TECHNICAL SPECIFICATIONS).
2. Check fuel supply to carburetor.
-
Run out of fuel. Refill.
-
Defective fuel valve. Replace fuel valve.
-
Poor quality and/or wrong fuel. Clean from contamination and use appropriate fuel (refer to
TECHNICAL SPECIFICATIONS).
-
Carburetor contaminated. Clean jets and carburetor float chamber from contamination.
-
Fuel line clogged and/or bent. Clean fuel supply from contamination and/or replace defective
part(s).
-
Fuel supply to less at high RPM. Clean fuel supply from contamination.
vmr2006-065
Section 02 TROUBLESHOOTING
Subsection 01 (TROUBLESHOOTING CHART)
(cont'd)
19