1970-1979 Ski-Doo Snowmobiles Service Manual, Page 94Get this manual
ENGINE Table SINGLE CYLINDER ENGINE SPECIFICATIONS
Cylinder Bore (Standard)
Wear Limit
Ring End Gap
Crankshaft End Play
247 292 300,302 335,337
2.7165 in(69.0mm) 2.9528 in(75.0mm) 2.9921 in(76.0mm) 3.0708 in(78.0mm)
0.0065 in(0.165mm) 0.0076 in(0.195mm) 0.0076 in(0195mm) 0.0076 in(0.195mm)
0.010-0.063 in(0.25-1.60mm) 0.012-0.063 in(0.30-1.60mm) 0.012-0.063 in(0.30-1.60mm) 0.012-0.063 in(0.30-1.60mm)