1978 Ski-Doo Shop Manual, Page 156Get this manual
SECTION 04 SUB-SECTION 02 (ENGINES)
ENGINE SUPPORTMUFFLER
REMOVAL FROM VEHICLE
Remove or disconnect the following (if applicable) then
lift engine out of vehicle Pulley guarddrive belt Muffler Cab retaining cable Air intake silencer Fuel lines at carburetor, impulse line Throttle cable Electrical junction block Rewind starter Engine mount nuts