Water Flow Regulator Valve - Sea-doo GS Shop Manual

Water Flow Regulator Valve

A water flow regulator valve is mounted on mod-
els with the 787 RFI and 947 engines so that they
can produce the maximum horsepower output
and yet maintain the necessary diameter of the
injection fitting at the tuned pipe head for unob-
structed water flow.
The water flow regulator valve no. 4 is mounted
directly onto the muffler.
3
1
F01E1FA
TYPICAL
1. Water supply hose of regulator valve
2. Regulated water to injection fitting
3. Water injected into the muffler
NOTE: The water injected into the muffler is not
regulated by the valve. A calibrated water injection
fitting of 3.0 mm (.118 in) inside diameter limits
water flow into the muffler.
The water flow regulator valve has a calibrated
spring and a tapered needle which regulate the
injected water in the tuned pipe.
CAUTION: Do not change the calibration of the
spring, otherwise serious engine damage can
occur.
At low speed, water pressure in the supply hose
of the regulator valve is not sufficient to overcome
the spring of the regulator valve; more water is
being delivered to the injection fitting at the tuned
pipe.
SMR2000-014_05_02A.FM
Subsection 02 (CIRCUIT, COMPONENTS AND CARE)
LOW SPEED OPERATION
1. Water entering regulator valve
2. Water exiting regulator valve (less restriction)
3. Water injected in the muffler
At higher speed, water pressure increases in the
2
supply hose of the regulator valve and gradually
overcomes the return spring of the regulator
valve. Less water is being delivered to the injec-
tion fitting at the tuned pipe.
HIGH SPEED OPERATION
1. Water entering regulator valve
2. Water exiting regulator valve (more restriction)
3. Water injected in the muffler
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Section 05 COOLING SYSTEM
05-02-13