4.3 Carb on a 3.0 Mercruiser

[deanjoshua]

Here's another one for...

A guy I know is going to give me a deal on a recently rebuilt 4.3 carb for my 3.0 Mercruiser. The carb looks like it will physically fit, but I was wonder what your input would be?

Do you think there would be any problems other than gas consumption?

Thanks in advance!

 

[Don S]

Re: 4.3 Carb on a 3.0 Mercruiser

THINK about it

Why would Mercruiser, OMC, Volvo, even GM, use different carbs on a 4 cylinder than they would on a V6, or a V8 if one would work for all.
The basic outsides look the same because they are, the insides are different.

 

[deanjoshua]

Re: 4.3 Carb on a 3.0 Mercruiser

I realize this...but in your opinion what would be the hindrance in using that carb on the 3.0?

In my opion, what it would come down to is the jetting(the insides).

 

[fishrdan]

Re: 4.3 Carb on a 3.0 Mercruiser

I realize this...but in your opinion what would be the hindrance in using that carb on the 3.0?

Loss of low end torque and the boat struggling to get on plane.

 

[Faztbullet]

Re: 4.3 Carb on a 3.0 Mercruiser

Only difference is power valve and high speed jetting. Same 485 CFM carb wont give ya any thing but fouled plugs and S****y hole shot as is.

 

[deanjoshua]

Re: 4.3 Carb on a 3.0 Mercruiser

This is great stuff...

Is there anything I can transfer from the old carb to the new carb in order to avoid this, i.e. the jetting?

Thanks