1989 Ski-Doo Repair Manual, Page 84Get this manual
Section 02 ENGINE Sub-section 03 (377 ENGINE TYPE)
Position key, magneto flywheel and lock washer on crankshaftClean nut threads and apply Loctite 242 (blue, medium strength) before tightening nut to 85 N-m (63 Ibf-ft)At reassembly coat all electric connections with silicone dielectric grease (PIN 413 7017 00) to prevent corrosion or moisture penetration CAUTION: Do not use silicone "sealant", this product will corrode contacts