Section 09 COOLING SYSTEM
Subsection 01 (CIRCUIT, COMPONENTS AND CARE)
CIRCUIT
CAUTION: All hoses and fittings of the cooling
system have calibrated inside diameters to as-
sure proper cooling of the engine. Always re-
place using appropriate Bombardier part num-
ber.
CAUTION: Never modify cooling system ar-
rangement, otherwise serious engine damage
could occur.
The tuned pipe and the expansion pipe have a wa-
ter jacket to control the exhaust system tempera-
ture.
The water from the expansion pipe water jacket is
injected into the muffler to cool it (last part of the
expansion pipe water jacket has internal holes).
TECHNICAL DATA
TYPE
TLCS (Total Loss Cooling
System).
COOLANT FLOW Flow from impeller
housing (no water
pump).
TEMPERATURE
CONTROL
Calibrated outlet fittings
(no thermostat).
SYSTEM BLEEDING
Self-bleed type (hose
at uppermost point of
circuit).
SYSTEM DRAINING
Self-drain type (hose at
lowest point of circuit).
SYSTEM FLUSHING
Hose adapter.
MONITORING BEEPER
Turnsonat86-94°C
(187 - 201°F).
COMPONENTS
Due to the dry pipe design (no water injection in
tuned pipe) of this watercraft, there is no water
flow regulator valve as found on other 787 RFI
watercraft.
CARE
For flushing purposes, the cooling system is
equipped with a hose adapter.
A garden hose is used to flush the whole sys-
tem by backwash. For flushing procedure, refer to
FLUSHING AND LUBRICATION in the Shop Man-
ual.
For winterization of cooling system, refer to
STORAGE.
TOWING THE WATERCRAFT
IN WATER
Special precautions should be taken when towing
a Sea-Doo 3D watercraft in water.
Maximum recommended towing speed is
24 km/h (15 MPH).
When towing your watercraft in water, pinch the
water supply hose from the jet pump housing to
theenginewithalargehosepincher(P/N529032
500).
F01B23A
This will prevent the cooling system from filling
which may lead to water being injected into and
filling the exhaust system. Without the engine
running there isn't any exhaust pressure to carry
the water out the exhaust outlet.
CAUTION: Failure to do this may result in dam-
age to the engine. If you must tow a strand-
ed watercraft in water and do not have a hose
pincher be sure to stay well below the maxi-
mum towing speed of 24 km/h (15 MPH).
28 smr2004-3D
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