Ski-Doo 2005 MACH Z, Shop Manual

Page: 131 / 343

Section 03 FUEL SYSTEM
Subsection 01 (FUEL TANK AND FUEL PUMPS)
DIAPHRAGM FUEL PUMP
REMOVAL
Remove the following:
– muffler, refer to ENGINE
– belt guard
– air silencer (engine side), refer to ENGINE
– engine supports elastic nuts.
Unplug magneto connector.
Remove both spark plugs.
Install in the MAG side spark plug hole the spark
plug lift ring (P/N 529 035 830).
Using the engine removal hook (P/N 529 035 829),
lift engine until engine supports are free from rub-
ber mount studs.
529 035 829
Unplug engine vacuum hose from pump.
Cut locking tie holding fuel pump inlet and outlet
hoses.
Remove screws retaining fuel pump to frame.
A35I0AA
1
2
1. Unplug vacuum hose
2. Remove screws
Pull out fuel pump from under the engine.
Install a hose pincher (P/N 295 000 076) on inlet
and outlet hoses.
295 000 076
Unplug inlet and outlet hoses then remove fuel
pump.
A35I0BA
1
1
2
2
1. Install hose pincher
2. Unplug hoses
DIAPHRAGM FUEL 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
pump of leak test kit. The inlet valve should re-
lease 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 also under vacuum.
NOTE: Plug remaining outlet with finger while
checking outlet valve.
Check impulse diaphragm and gasket on fuel
pump with twin outlets as follows:
Connect a clean plastic tubing to the impulse nip-
ple and plug vent hole on top cover on so equipped
models. Either apply pressure or vacuum. The
diaphragm/gasket must not leak.
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