2007-2008 Polaris IQ Snowmobiles Service Manual, Page 89Get this manual
Fuel Systems FUEL PUMP
Fuel Pump Overview
FUEL IN (FROM TANK)
Maintenance
The impulse operated-powered fuel pump does not require any specific scheduled maintenanceHowever, the following procedures should be observed: Operation The pump may be checked for operation by removing the fuel supply line from the carburetor and placing it into containerWith the engine idling at approximately 2000 RPM, steady flow of fuel should be visible Cleaning The impulse line must be disassembled and cleaned of foreign material in the event of piston or other internal engine part failures which produce fragments Inspection Disconnect impulse line from pumpConnect Mity Vac to impulse fitting (or line) and apply 4-6 PSI pressureDiaphragm should hold pressure indefinitely