Info on 165hp 250ci in line 6 cyl.

[Bushwacker]

Originally Posted by Step Up

. . . So I was thinking pull the 6 and go 5.7 or 5.0 but then I was thinking why. I am not building a race boat. . .

One potential issue with a V-8 or even a V-6, is clearance in the engine box. The 20' Sceptre that Strick redid originally came with a V-8, which he pulled and replaced with a bracketed outboard. I remember Strick commenting that clearance in the engine box was very tight, such that even changing plugs was a chore, let alone trying to change exhaust manifolds, risers or starter! Big difference in maintainability between a V engine and the I-6!

That said, the 3.8L GM V-6/Mercruiser seems to be a nice package, as I remember a Seafari advertised for sale with that package which was reportedly a 50 mph rig! Although the I-6 is probably heavier than the V-6, I think your CG would be further forward with the I-6, which would make it ride better!