Mercruiser 4.3 Engine Swap...Please Help.

[baron119]

Ok hopefully someone will be able to help me with this question. I have a 1993 Sea Ray with a Merc 4.3 (serial number OF121304). I need a new engine and I found a 1992 Merc 4.3 (serial number D823678) Is there anyway to find out if I can swap these two engines without any issues? My current engine has a crack on the starter mount. The engine that I am looking at is drop in ready. Thanks for any advice or info.

 

[havasuboatman]

Re: Mercruiser 4.3 Engine Swap...Please Help.

They will swap.

 

[baron119]

Re: Mercruiser 4.3 Engine Swap...Please Help.

do both of these engines have a balance shaft?

 

[imported_TheMan]

Re: Mercruiser 4.3 Engine Swap...Please Help.

You will have to tell us that..

The blocks from '92 and on have the balance shaft.. if your block is a true 92.. maybe. if its from 91, no it won't.

 

[180shabah]

Re: Mercruiser 4.3 Engine Swap...Please Help.

"New engine"
http://www.mercruiserparts.com/sele...X+++(GEN+II)+(4+BBL.)++++GM+262+V-6+1992-1993

"Old engine"
http://www.mercruiserparts.com/sele...3L+++(GEN+II)+(2+BBL.)+++GM+262+V-6+1993-1995

Looks like no Balance shaft for the "new" engine, but yes it is a direct drop in. If you reuse your current intake and carb the linkages will all work as well.

 

[baron119]

Re: Mercruiser 4.3 Engine Swap...Please Help.

I received an email from the marine yard that has the 92 and they say it is an exact fit, so I guess my next question would be, if it does not have a balance shaft is it a deal breaker?

Thanks for all the posts

 

[180shabah]

Re: Mercruiser 4.3 Engine Swap...Please Help.

Deal breaker? no tif the price is right. It'll just shake a little, most noticable from 1200-1800 RPM. Most boats don't hang around in that range for long.

 

[Bondo]

Re: Mercruiser 4.3 Engine Swap...Please Help.

Ayuh,... Bolt it in,+ Go Boating.....