2005 Ski-Doo Racing Handbook, Page 385Get this manual
SECTION 082005 MX 550 AND 380 FC
To Bleed Oil Lines
Bleed main oil line (between reservoir and pump) by loosening the bleeder screw no14 until air has escaped from the lineAdd injection oil as requiredReinstall all partsBleed the small oil line between pump and engine by running engine at idle while holding the pump lever in fully open positionNOTE: Make hook out of mechanical wire to lift the lever
Test Bench Connect hose filled with injection oil to main line ed th ect on ma ne fittingInsert other hose end in an injection oil tt ng nsert ect on containerUsing clockwise rotating drill rotate conta ner Us ng ockw se rotat ng dr pump shaftOil must drip from outer fittings while shaft dr tt ngs wh holding lever in fully open positionIf not replace ho ng ever fu pos on rep ace pumppump
Check Valve