Section 06
FUEL SYSTEM
Sub-Section 03
(CARBURETORS)
06-03-6
HIGH LEVER
Step
depress here
Step
push tab down
LOW LEVER
Step
depress here
Step
pry up here
POP OFF PRESSURE TEST
Proceed as followsþ:
– Install pump gauge tester on carburetor inlet
nipple.
– Obstruct outlet nipple with a finger.
– Pump tester until inlet release pressure is
reached (seen by a sudden pressure drop).
TYPICAL
1. Pump gauge tester
2. Install on inlet nipple
3. Obstruct outlet nipple
Refer to the following table for specifications of
the pop off pressure for each model.
NOTE :
Pressure test should be performed
three times to obtain a valid reading.
If release pressure is not within specification,
check control lever adjustment. Replace spring as
necessary.
CAUTION : Do not stretch or cut spring.
LEAK TEST
Needle valve must stand a pressure of 69 kPa (10
PSI) for 30 seconds. Otherwise, hold carburetor
upside down, pour oil over needle valve and apply
pressure.
Check for bubbles. If they come from seat or O-
ring, bubbles will exit around seat. Retighten as
necessary.
If it still leaks remove needle and seat and replace
O-ring.
If bubbles come from needle, replace needle and
seat.
9,10, Main Jet and Pilot Jet
Pilot jet and main jet are replaceable. Different jet
sizes are available to suit temperature and altitude
conditions. Always inspect spark plug tip condi-
tion when dealing with pilot jet and main jet. Spark
plug tip condition gives a good indication of carbu-
retor mixture setting.
CAUTION : Adjustments vary with tem-
perature and altitude. Always observe
spark plug condition for proper jetting.
NOTE :
To have access to pilot jet or main
jet, check valve housing must be removed.
F01F0HA
2
1
1
2
F01F34A
2
1
1
2
F01F10A
1
2
3
MODELS
POP OFF
PRESSURE
(PSI)
MINIMUM
STABILIZED
PRESSURE
SP
21-37
14
SPX
40-56
24
SPI
21-37
14
GTS
21-37
14
GTI
40-56
24
XP
27-39
15
HX
40-56
24
-
-
www.SeaDooManuals.net