2002 Ski-Doo Shop Manual Volume One, Page 189Get this manual
Section 04 ENGINE Subsection 11 (CARBURETOR AND FUEL PUMP)
PUMP VERIFICATION
Check fuel pump valves operation as follows: Connect clean plastic tubing to the inlet nipple and alternately apply pressure and vacuum with pump of leak test kitThe inlet valve should release with pressure and hold under vacuumRepeat the same procedure at the outlet nippleThis time the outlet valve should hold with pressure and release under vacuumNOTE: On model fitted with outlets, plug outlet with finger while checking outlet valveTo check impulse diaphragm and gasket on highsupply fuel pump equipped with twin outlets, proceed as follows: Connect clean plastic tubing to the impulse nipple and plug vent hole on top coverEither apply pressure or vacuumThe diaphragmgasket must not leak