1978 Ski-Doo Shop Manual, Page 179Get 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 Mufflerair duct Cab retaining cable Air intake silencer Fuel lines at carburetor, impulse line Throttle cable_ "
Electrical junction blockCAUTION: On electric start model, disconnect negative cable (ground) from battery before disconnecting other wires Rewind starter Engine mount nuts