Ski-Doo FORMULA III, Shop Manual

Page: 170 / 356

Section 04 ENGINE
Sub-Section 11 (CARBURETOR AND FUEL PUMP)
04-11-14
REMOVAL
Install a hose pincer (P / N 529 0099 00) on fuel
supply line close to pump inlet.
Disconnect fuel outlet line(s).
Disconnect impulse line.
Remove screws securing fuel pump.
PUMP VERIFICATION
Check fuel pump valves operation as follows :
Connect a clean plastic tubing to the inlet nipple
and alternately apply pressure and vacuum with
the mouth. The inlet valve should release with
pressure and hold under vacuum.
Repeat the same procedure at the outlet nipple.
This time the outlet valve should hold with pres-
sure and release under vacuum.
NOTE : On model fitted with 2 outlets, plug
1 outlet with finger while checking outlet
valve.
Check impulse diaphragm and gasket on high-
supply fuel pump with twin outlets as follows :
Connect a clean plastic tubing to the impulse nip-
ple and plug vent hole on top cover. Either apply
pressure or vacuum. The diaphragm / gasket
must not leak.
CLEANING AND INSPECTION
The entire pump should be cleaned with general
purpose solvent before disassembly.
Fuel pump components should be cleaned in gen-
eral purpose solvent and dried with compressed
air.
WARNING : Solvent with a low flash point
such as gasoline, naphtha, benzol, etc.,
should not be used as each is flammable and
explosive.
Inspect diaphragm. The pumping area should be
free of holes, tears or imperfections. Replace as
needed.
High-supply pump with twin outlets : Thor-
oughly clean filter on top cover. Replace pump if
too dirty.
INSTALLATION
To install, inverse removal procedure.
WARNING : Pressure test to ensure there
is no leak in fuel system.
A01B2JC
529 0099 00
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