Section 08
COOLING SYSTEM
Subsection 02
(CIRCUIT, COMPONENTS AND CARE)
08-02-6
SMR2002-080_08_02A.FM
DI engines
CIRCUIT
CAUTION:
All hoses and fittings of the cooling
system have calibrated inside diameters to as-
sure proper cooling of the engine. Always replace
using appropriate Bombardier part number.
The water supply is provided by a pressurized area
in the jet pump between the impeller and venturi.
The water flow is controlled by a reducer located
between the jet pump support and the jet pump
on the inlet side. The reducer is blue on the DI mod-
els.
The water is entering the engine by the water inlet
fitting at the cylinder head.
1. Water supply hose
Water from inlet hose also supplies the water reg-
ulator on muffler and magneto cover and crankcase
cover.
Water then is expulsed through the pump support
drain.
Water circulates through the one piece cylinder
head which features improved combustion cham-
ber and better spark plug cooling.
Water enters cylinder block water jackets and is
directed to the water jackets of the exhaust man-
ifold and tuned pipe head through passages locat-
ed above and below exhaust ports.
1. Water passages
F08E05A
1
F06D21A
F06D20A
1
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