1972 Ski-Doo Shop Manual, Page 133Get this manual
SINGLE CYLINDER ENGINE 34Remove the five (5) nuts and washers securing crankcase halves (fig2-2-20)
38On 247 and 302 engine types, repeat step 36 to remove the magneto side crankcase halfRemove cran kcase gasket39On all engine types, remove the crankshaft
bearings using the appropriate bearing puller (fig2-2-22)