1978 Ski-Doo Shop Manual, Page 131Get this manual
SECTION 04 SUB-SECTION 02 (ENGINES)
ENGINE SUPPORTMUFFLER
Everest 340 and Futura 400
89101112
Anchor pad Nut Engine support Washer Reinforcement plate Lockwasher Felt strip Exhaust spring bracket Rivet Stud Loctite l.ock'n Seal 242 Bolt