1978 Ski-Doo Shop Manual, Page 357Get this manual
SECTION 08 SUB-SECTION 05-02
1978 BOSCH SPARK PLUG CHART
ENGINE TYPE ELANSPIRIT ELAN OLYMPIOUE OLYMPIOUENUVIK CITATION EVEREST FUTURA EVEREST FUTURA EVEREST FUTURA T'NT T'NT RVSONIC BLIZZARD ALPINE ELITE 340 FA 250 250 DL 300T 340 300 340 400 440 444LC FULL LOAD PARTIAL LOAD
247 248 305 343 294 343 402 440
M175Tl W240Tl W280MZl W280MZl W280MZl W280MZl W280MZl M260Tl W280MZ2