1989 Ski-Doo Repair Manual, Page 89Get this manual
Section 02 ENGINE SUb-section 03 (377 ENGINE TYPE)
ADJUSTMENT
Prior to adjusting the pump, make sure all carburetor adjustments are completed
To bleed ojlines:
All oil lines should be full of oilIf required, bleed the main oil line (between tank and pump) by loosening the bleeder screw until all air has escaped from the lineMalee sure the reserwir is sufficiently filled Check the small oil lines (between pump and intake manifold)If required, fill the lines by running the engine at idle speed while holding the pump lever in fully open position