Powerhead Compatibility 83 >> 92

[Gage S]

I have a very good running 83 70 hp powerhead that I want to put on a 92 70hp because the 92 has a better tilt/trim unit.

I know these motors are very similar but does anyone know if they are in fact interchangeable?

Also what years of lower units are compatible?

 

[Chinewalker]

Re: Powerhead Compatibility 83 >> 92

No, they will not swap. The '83 is a 49-cube powerhead using a 4-sided crankshaft/driveshaft, while the '92 is a 56 cube powerhead using a fine spline crankshaft/driveshaft.

The '83 will use units from the late 1970s into the mid 1980s with the 4-spline driveshaft and mechanical shift. The '92 will use units from later 1980s 'til the end of the run in the late 1990s using the fine spline driveshaft.