4.3 liter io

[mpcalfa2]

Does anybody have a 4.3 liter io in their V? I'm having one put in as we speak and was wondering what type of performance to expect. Speed, gas consumption, etc... It's a raw water cooled 2 barrel with very low hours (under 200).

[nipper]

I had a brand new 4.3 litre mercruiser put in my 1991 V20 Cuddy last year. I have only run it about 10 hours, so it is really too early for me to tell. I had a previous 4.3, and I can tell you it is pretty miserly on the gas. I have never done the calculations. I have never done speed off gps, but the speedo says about 42-45 depending on the conditions at wot.

[macojoe]

Why not FWC?? I can tell you from exsprince that raw water will kill that motor in 1/2 the time

[THEFERMANATOR]

Probably money is why he's going raw water cooled. Depending on the model, freshwater cooling can be reasonable to outragous in price.

[rb437]

Originally Posted by macojoe

Why not FWC?? I can tell you from exsprince that raw water will kill that motor in 1/2 the time

I don't have a 4.3 so I can't comment on the performance. However, I would definitely spend a little more and go with the fresh water cooling. My 19 year old 3.7 that is fresh water cooled is still running strong.

[mpcalfa2]

Originally Posted by macojoe

Why not FWC?? I can tell you from exsprince that raw water will kill that motor in 1/2 the time

My guy is trying to convert this engine to a fwc for me but he's not sure that it'll fit yet. He's going to try to take parts off of the old 470 and see if he can make it work. Anybody ever done something like this?

[phester]

mpc2, what was wrong w/ the orig. motor?

[spareparts]

using that heat exchanger off of the 3.7 is going to be difficult to adapt. Orca used to sell kits, or check with ebasic power in harkers Island, if you can't find it on their web site( i hate their web site), call and ask for Junior, tell him what you are looking for