1972 Ski-Doo Shop Manual, Page 179Get this manual
2-OS-01 Engine
CLEANINGINSPECTION 2
CLEANING 1Discard all oil sealsgaskets and "0" rings as each of these items must be replaced during Assem bly procedures2Individually clean each metal component using cleaning solventDry using clean clothCAUTION: Clean armature plate with clean cloth only as cleaning solution can cause
5Clean the ring grooves of the piston using "piston groove cleaner tool"In case of "L" ring grooves or if "piston groove cleaner tool" is not available, use broken ring to clean the grooves (fig2-8-2)
damage3On engine equipped with decompressor valve, immerse valve assembly in container of cleaning solution and using firm bristle brush, clean the valve seating area4Using wooden spatula, scrape off any carbon formation from cylinder exhaust port, cylinder head and piston dome (fig2-8-1)