1981 Ski-Doo Shop Manual Supplement, Page 50Get this manual
SECTION 03 SUB-SECTION 03 (IGNITION TIMING)
1981 IGNITION TIMING SPECIFICATIONS
ENGINE TYPE IGNIT ION TYPE DIRECT MEASUREMENT IN DIRECT MEASUREMENT EDGE GAP
247 Breaker
5-8 mm (0.197-0.315"8-12 mm (315-.472") N.A8-12 mm (3 15-.472") N.A
3 .98 mm 2: 0.25 (157" :: .010) N.A2.52 mm :!:: 0.25 (0099" :!:: 0.010) 2.07 mm :!:: 0.25 (,081" :: .010) 2.52 mm :: 0.25 (0.099" 2: .010) 2.52 mm :: 0.25 (0.099" :: .010) 2.07 mm 2: 0.25 (,081" 2: 0.10) N.A