1978 Ski-Doo Shop Manual, Page 353Get this manual
SECTION 08 SUB-SECTION 04-04
1978 IGNITION TIMING SPECIFICATIONS
ENGINE TYPE IGNITION TYPE DIRECT MEASUREMENT B.T.D.CINDIRECT MEASUREMENT B.T.D.C
EDGE GAP
6.6 mm 1.5 (.260" .060) 9.0 mm 2.0 (.354" .079) 9.0 mm 2.0 (.354" .079) 6.6 mm 1.5 (.260" .060) 6.6 mm 1.5 (.260" .060) N.A"Ii
247 248 294 305 343
Breaker points Breaker, points Breaker points Breaker points Breaker points
3.98 mm 0.25 (.157" .010) 2.22 mm 0.25) (,087" .010) 2.39 mm 0.25 (,094" .010) 2.11 mm 0.25 (.083" .010) 2.11 mm 0.25 (,083" .010) 1.12 mm 0.25 (,044" .010) 2.52 mm 0.25 (,100" .010) 1.39 mm 0.25 (,055" .010) 2.11 mm 0.25 (.083" .010) 3.07 mm 0.25 (.121" .010) 2.35 mm 0.25 (.092" .010) 3.95 mm 0.25 (.156" .010)