Section 05
COOLING SYSTEM
Subsection 02
(CIRCUIT, COMPONENTS AND CARE)
05-02-8
SMR2000-014_05_02A.FM
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.
717 Engine
A Serial Cooling System is utilized on the 717 en-
gine, which offers an efficient cooling of the com-
bustion chamber to prevent the possibilities of
detonation.
The water supply is taken from a pressurized area
in the jet pump between the impeller and venturi.
Water enters the cylinder head, cooling the com-
bustion chamber to prevent detonations. Then,
water exits cylinder head toward tuned pipe.
1. Cylinder head cover
2. Fresh water from jet pump
3. Water exiting head assembly to tuned pipe, exhaust manifold and
cylinders
4. Water from cylinder water jackets exiting engine
The tuned pipe and exhaust manifold are designed
with a double wall to allow water circulation.
Water is pre-heated by the exhaust system before
entering the cylinder cooling jackets.
Water enters cylinder cooling jacket through pas-
sages located below exhaust ports from tuned
pipe.
1. Water passages
No water enters crankcase.
When engine is running, water must flow from
bleed outlet indicating that water circulates.
CAUTION:
When investigating for no water
flow in the cooling system, check all elbows and
straight fittings as well as all hoses for block-
age.
For a minimum back pressure in the exhaust, en-
gine water outlet hose is not connected to the ex-
haust. It has its own outlet at the rear of the hull.
TYPICAL
1. Engine water outlet hose
F01E1LA
2
3
1
4
F01D7HB
1
F01E1GA
1
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Содержание 2001 GS
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