I have a 53 Wards 3 Hp Sea King, it uses a single cylinder Gale motor model 3D11. I have an extra cylinder from a Gale motor, I think, that I am trying to identify. The number on the part is 590723. I thought is was also from a 1953 Wards Sea King 3 hp, but the head gasket holes are slightly off, and the part number is wrong (the original cylinder on my motor has part number 591025). If anyone has a master parts list from Gale and could look it up I sure would appreciate it. I attached some pics of the mystery cylinder.
'57 Johnson QD18 10hp
'53 Sea King 3hp