1978 Ski-Doo Shop Manual, Page 192Get this manual
SECTION 04 SUB-SECTION 02, (ENGINES) ("
ENGINE SUPPORT AND MUfFLER
REMOVAL FROM VEHICLE
Disconnect or remove the followings from vehicle:Pulley guard and drive beltIntake silencer and throttle cableFuel lines, primer and impulse lines, fuel tank- Electrical wires (at engine, alternator, started, WARNING: Before disconnecting any electrical wire in starter system, always first disconnect the battery cable- Drain the cooling system and disconnect hoses at engine,Remove engine mount nuts then lift engine from vehicle