1989 Ski-Doo Repair Manual, Page 227Get this manual
Sub-section 10
Section 02 ENGINE (CARBURETORFUEL PUMP)
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Fuel pump assemblv Packing Diaphragm Grommet Valve Diaphragm Packing (cap) Screw Pump bodv
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Impulse chamber Cover Fuel pump assemblv Diaphragm Membrane Packing (cap) Screw Cover Impulse chamber
REMOVAL
Disconnect fuel inlet line at fuel pump then secure fuel line to steering support so that the open end is located higher than the fuel tank or plug itDisconnect fuel outlet line{s)Disconnect impulse lineRemove screws (or nuts if applicable) securing fuel pumpSINGLE OUTLET PUMP
DISASSEMBLYASSEMBLY
4,5,9, Grommet, valve, pump body (twin outlet pump only)
Do not disassemble valve unless replacement is indicated To install new valve, proceed as follows:Place new valve flat on its seat- Insert 2.5 mm (332 in) pin punch inside valve holder and lubricate tip of holder with drop of oil-Push holder into pump body as illustrated