Just picked up a 1955 7.5 Fleetwin with a tank. I don't know why but I hope to get it running again. Throttle arm and swivel bracket are frozen. Transom clamps loosened with heat then oils. The throttle arm seems easy enough to diassemble clean and grease but the swivel bracket seems to be the bigger challenge. I sprayed a few penetrants and greased the zirk but she is frozen good. Any suggestions are appreciated.