1985 Ski-Doo snowmobile Service Manual, Page 459Get this manual
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SECTION 09 TECHNICAL DATA
VM 34-310 230 159 p8 30 6EJl-3 3,d 30
VM 34-334 270 159 P4 40 6EJ13 3d 3.0
PTO VM 34 320 MAG VM 34 321 PTO 240 MAG 250
PTO