Swap 4.3 OMC to 5.7 Mercruiser

[Elbeau]

I have an opportunity to buy an 1986 Glassmaster Regency 210 Cuddy in great shape for almost nothing...because the 4.3 OMC engine AND outdrive are shot.

I also have the chance to buy a 20' Kayot deck boat that has a hull leak, but also has a perfectly running Mercruiser 5.7 (350ci) and Alpha outdrive.

I've done difficult engine swaps before (I shoved a 460 Ford engine in a 1950 Ford F1). I'll redo all the wiring and cables, so I'm not looking for advise on them. What I DO want to know is how hard it would be to mount the 350 mercruiser in the OMC's place AND how hard it will be to mount the alpha outdrive in the OMC's place.

Please let me know anything you know about it. Thanks in advance.

 

[Bondo]

Re: Swap 4.3 OMC to 5.7 Mercruiser

What I DO want to know is how hard it would be to mount the 350 mercruiser in the OMC's place AND how hard it will be to mount the alpha outdrive in the OMC's place.

Ayuh,... It should pretty much be a piece of Cake,....
As Long As, it was a Cobra,+ Not a Stringer Drive...

If it was a Stringer Drive,... You've got abunch of Glassing to do....

 

[Elbeau]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Ayuh,... It should pretty much be a piece of Cake,....
As Long As, it was a Cobra,+ Not a Stringer Drive...

If it was a Stringer Drive,... You've got abunch of Glassing to do....

I'm not too familiar with OMC outdrives, but from what I can see on google it looks like a Stringer drive...so...yuck. I've never done Glassing on a boat...how much work are we talking about? Does anybody sell some kind of conversion plate that can mount on, etc?

Thanks.

 

[Elbeau]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Here's the only pic I have of the outdrive. Can anybody identify?

 

[Bondo]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Ayuh,... You have a Stringer Drive,... That $uck$,..

Go down to the Restoration Forum,... This has been covered Over,+ Over,+ Over,+ Over.....
Search Transom Replacement...

Also,...
There's a thread in this forum about the Adapter Plate that can't be bought, right here in this forum,..
Click Here....

 

[Elbeau]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Ayuh,...

Go down to the Restoration Forum,... This has been covered Over,+ Over,+ Over,+ Over.....

Also,...
There's a thread in this forum about the Adapter Plate that can't be bought, right here in this forum,..
Within the last few days....

Fair enough...but can you identify that outdrive for me? I'm having a hard time telling.

 

[Bondo]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Ayuh,... See above,... I editted while you were typing...

 

[Elbeau]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Ayuh,... You have a Stringer Drive,... That $uck$,..

Well...here's the good news: I DON'T have it yet...I was going to buy it today. Thanks for your help, I'm moving on to greener waters.

 

[Elbeau]

Re: Swap 4.3 OMC to 5.7 Mercruiser

Can somebody please give me a guess at how much a reputable shop might charge to replace the transom and cut a new hole?