1986 Ski-Doo Factory Shop Manual, Page 80Get this manual
Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
ADJUSTMENT
Prior to adjusting the pumpmake sure all carburetor adjustments are completedTo synchronize pump with carburetor: Eliminate the throttle cable free-play by pressing the throttle lever until light resistance is felt, then hold in placeThe aligning marks on the pump casting and on the lever must alignIf not, loosen the adjuster nut and adjust accordinglyRetighten the adjuster nut
To bleed oil lines: All oil lines should be full of oilIf required, bleed the main oillins (between tank and pump) by loosening the bleeder screw until all air has escaped from the lineMake sure the tank is sufficiently filledCheck the small oil lines (between pump and intake manifoldL It required, fill the lines by running the engine at idle speed while holding the pump lever in fully open position(TYPICAL)