Ski-Doo Formula S 1998, Shop Manual

Page: 140 / 338

Section 04 ENGINE
Subsection 09 (CARBURETOR AND FUEL PUMP)
04-09-11
REMOVAL
Install a hose pincher (P/N 529 0099 00) on fuel
supply line close to pump inlet.
1. Hose pincher (P/N 529 0099 00)
Disconnect fuel outlet line(s).
Disconnect impulse line.
Remove screws (or nuts if applicable) securing
fuel pump.
LOW-SUPPLY FUEL PUMP WITH SINGLE OUTLET
1. Fuel outlet line
2. Impulse line
3. Fuel inlet line
HIGH-SUPPLY FUEL PUMP WITH TWIN OUTLETS
1. Inlet
2. Outlets
3. Impulse
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 release under vacuum.
NOTE: On model fitted with 2 outlets, plug 1 out-
let 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.
DISASSEMBLY
1,2, Grommet and Valve (high-supply
pump with twin outlets only)
Do not disassemble valves unless replacement is
necessary.
A01B2JB
1
A00C27A
1
2
3
A00C3CA
1
2
3