Would someone help me with model identifiers? It's a 25E77H Johnson 25 hp. The identifier codes page here seem to start at the 1980 yr. and up. It is "E"lectric start and "77" is the year but I'm stumped on the "H" code identifier. Also to look at the motor it appears to be a long shaft however there is no 5 inch spacer btwn the exhaust housing and the bottom end? Can it still be a long shaft? Hoping the "H" code can clarify.