2005 Ski-Doo REV Series Shop Manual, Page 179Get this manual
Section 03 ENGINES Subsection 10 (OIL INJECTION SYSTEM)
Oil Reservoir Check Valve
It allows air to get into the reservoirTo verify this one-way check valve, remove it along with the hoseMake sure that it holds pressure and that it does not let air go throughWhile installing this check valve make sure that the black side is towards the reservoirDISASSEMBLY
NOTE: Some oil pump components are not available as single parts
Injection Oil Reservoir
Empty injection oil reservoir no1 by siphoning injection oilRemove: air box upper screw no7 (near reservoir cap) rewind starter support and grip hose protector support electronic module (if the module is located on the reservoir) lower nut no8 or screw no9 and no10NOTE: Cut the ties retaining the wiring harness if necessary
A33D1DA