Re: OMC 40 hp Powerhead on 35 hp Midsection

[Casey Lynn]

The style of hood does make a difference when changing year models to this drastic of an extent. Cylinder head changes are the best way to go to make sure the old cowling will fit. Watch the compression when or if you do this. Second thing to watch for is the external coils depending on what year you go to. As I said in my first post the splines and driveshaft were different which made using the later model gearcase necessary. Seems there were some other minor issues as well but those were the major ones.