1970 Evinrude Ski-Twin, Ski-Twin Electric 33 HP Service Manual 4687, Page 21Get this manual
CARBURETOR AD.JUSTMENTS THROTTLE CAM ADJUSTMENT either the throttle reaIf throttle does not turn spring is too weak and should be replaced, or the throttle or linkage is bindingbTo check throttle adjustment, advance throttle control so that mark on throttle cam is in line with projection on intake manifoldSee Figure 3-19At this point, the throttle valve should be closed, the cam follower roller must ouch camIf not, adjust as follows: cAdvance throttle control until mark on armature plate cam is in line with raised projection on carburetor manifoldSee Figure 3-19dLoosen throttle arm clamp screwMake sure that throttle valve is in cl osed position, the cam follower roller must touc cam, and tighten screwSee Figure 3-20eThrottle valve should just begin to open after mark on cam passes projection on intake manifold as throttle is advancedfTo adjust throttle to conserve fuel at cruising speed, move armature base by hand to full spark advance, without touching throttle controlAdjust control rod collar for 1 32 inch clearance from pivot pinSee insert, Figure 3-20