Mercuiser swap out

[mayjean123]

has anyone put a merc 4 cly outdrive in a pontoon that has a 4 cly omc out drive

 

[havoc_squad]

It's no different than a ski boat conversion from OMC to Mercruiser, the transom work and motor mounts have to be retrofitted to support it.

I believe OMC Cobra conversions are easier than the OMC Stringer outdrive.

If you're keeping the engine from the OMC, I hope you have a GM inline 4 cylinder. I'm fairly sure the Ford 4 cylinder is a no go.

Don't forget, you'll need ALL the mercruiser components. (mercruiser engine mounts, manifold, riser, shift cables, mercruiser control box, trim pump, etc.)

 

[Bt Doctur]

A SEI Conversion kit allows a merc drive on a cobra housing

 

[Scott Danforth]

What year OMG motor? 1985 or earlier stringer with the big transom bellows or after 1985 with the cobra drive.

 

[mayjean123]

the motor is a gm line 1980 year thank you for the reply I figured it was pretty much forward

 

[Scott Danforth]

With it being a 1980, you will need yo rebuild the transom for the significantly smaller cutout for the mercruiser.

 

[Bondo]

Ayuh,.... In that case, yer ahead of the game sellin' what ya got, 'n find a donor boat with a 3.0l Merc motor, transom assembly, 'n outdrive,...

Do a pulleys to prop swap,...

Yer 3.0l motor, dressed as an OMC is of no use in the swap,...