will a 4.3 be put in inplace of a 2.3??

[tizbad]

I have a 1991 boat with a omc cobra2.3 litre in it and would like to know if a 1985 4.3 V-6 mercruiser would fit? any thoughts would be appreciated thanks.....Mike

 

[Chris1956]

Re: will a 4.3 be put in inplace of a 2.3??

Tiz, You need to measure the width of the stringers under the motor. The 4.3L will have a motor mount on each side, on top of the stringer. If you can find a boat with a 4.3/5.0/5.7 motor, you can measure how wide the stringers are apart and the basic size of the block. The 4.3 are obviously not as long as the v-8

 

[QC]

Re: will a 4.3 be put in inplace of a 2.3??

Also, be aware that the 2.3 was possibly the highest RPM I/O engine made. Your drive should be a 2:1 ratio and the V6 Cobra was 1.68:1 . . .

 

[Silvertip]

Re: will a 4.3 be put in inplace of a 2.3??

It depends on how thick your wallet is. This isn't a drop in and hook it up swap. You have riser issues, engine mount issues, coupler issues, gearing issues, to name just a few.