1985 Ski-Doo snowmobile Service Manual, Page 63Get this manual
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Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
9 N.m 180 Iblo,n)
AOO9002005
21,26, Screws M8 45, M8 70
The bigger screws have to be torqued to 21 -m (15 Ibt-ft) AOO9