1984 Ski-Doo Shop Manual, Page 295Get this manual
SECTION 04 ELECTRICAL SYSTEM SUB-SECTION 03 (SPARK PLUGS)
SPARK PLUG CHART
Models Engine type
Spark plugs
Bosch 175 (M A) NGK BR-SES NGK BR-SES Nippondenso 24 ESR-U Nippondenso 24 ESR-U Nippondenso 24 ESR-U NGK BR -SES NGK BR-SES NGK BR-7ES NGK BR-SES NGK BR-7ES