1980 Ski-Doo Shop Manual, Page 60Get this manual
SECTION 03 SUB-SECTION 02, (ENGINES)
ENGINE SUPPORTMUFFLER
REMOVAL FROM VEHICLE
Disconnect or remove the followings from vehicle:Pulley guard and drive beltAir silencer and throttle cable -
Fuel lines, pnmer and pulsation lines Muffler
Electric wires
Drain the cooling system and disconnect hoses at engme
Rotary valve oil reservoir