I have a question, Could a guy take a jet unit of a late 70's Evinrude and put it on say a 90 hp yamaha? I know there is a spacer to get the holes to line up. I think they are or were compatable. I think there is a single size for all 3 cyl. engines and a single size for 4 cyl. and so on. Am I wrong about this.
Thanks for the input.