1970-1979 Ski-Doo Snowmobiles Service Manual, Page 70Get this manual

1970-1979 Ski-Doo Snowmobiles Service Manual, Page 70

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4 Using hammer and small punch, straighten locking tab behind magneto unit (Figure 42)5 Install special crankshaft holding tool to magneto ring plate using nuts and washers from fan beltstarter pulley