1978 Ski-Doo Shop Manual, Page 332Get this manual
SECTION 06 SUB-SECTION 02, (FRAME)
FRAME WELDING
Steel frame:Electric WeldingAmperage: 70-110 Amp- Voltage: 20-24 voltsRod: E-7014 (332") Aluminum frame: (refer to specialized welding shop)Argon-oxygenacetylen weldingRod: ER-4043 (332")
FRAME WELDING
Clean frameFor aluminum frame use only" Aluminum cleaner" and follow instructions on container(Dursol cleaner or equivalent)Touch up all metal spots where paint has been scratched offSpray all bare metal parts of vehicle will metal protector