1985 Ski-Doo snowmobile Service Manual, Page 91Get this manual
Section 02 ENGINE Sub-section 04 (447 ENGINE TYPE)
ADJUSTMENT
Prior to adjusting the pump, make 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 place The aligning marks on the pump casting and on the lever must alignIf not, loosen the adjuster nut and adjust accordinglyRetighten the adjuster nut
Adjuster nut
Marks in line