1972 Ski-Doo Shop Manual, Page 167Get this manual
2-06-04 At this point, twisting the breaker points set from one side to the other using screwdriver blade will cause the timing light to fluctuateRetighten breaker points screwb) Rotate the magneto counter-clockwise 14 of turn and slowly tum the magneto back in clockwise directionAs soon as the timing marks align, the breaker points should lust begin to open and the timing light should fluctuate ENGINE TIMING
a} If the edge gap is less than .250 inch, loosen armature plate screws and rotate the armature plate assembly counter clockwise until edge gap is correctRetighten armature plate screwsb) If the distance is more than .875 inch, slacken armature plate screws and rotate the plate clockwise to obtain specified edge gapRetighten armature plate screws14If the edge gap was corrected, reset breaker
points to match the correct dial reading and
recheck points gap NOTE: The breaker points gap should be
between .014".018" 15Disconnect the red wire clip of the timing
light and connect it to the bluered wire leading
from the armature plate (P.T.Oside) 16When the T.O.Cgauge is used, unscrew adaptor lock nut, hold dial and unscrew adaptor from spark plug hole17Rotate crankshaft 1800 When the T.O.Cgauge is used, install and adjust as detailed in step 918When the T.O.Cgauge is not used, carry out the following: a) Align the timing marks of magneto and