3.0 vs 3.0

[gekog]

I have a 1979 Silverline with a 3.0 (140hp)Mercruiser. The engine is quite noisy and frankly, uses way more fuel than I thought it would. I bought the 4 cylinder because I am trying to save a bit compared to my previous 190 Mercruiser. The service department where I moor stated that the replacement motor for this one puts out 167hp. I have never seen a Mercruiser 3.0 advertised at 167hp. Also, would a replacement motor give me a quieter ride and better fuel economy? Cost stated from him - $2,900 plus 6 hrs labor. gekog@shaw.ca

 

[DJ]

Re: 3.0 vs 3.0

gekog,<br /><br />THe prop. rating for the 3.0L is 135. I would suspect it's somewhere around 150 at the crank.<br /><br />It could be as high as the wrench says.<br /><br />I doubt it would be much better economy wise, unless your current engine is sick.<br /><br />The price sounds about right for a "drop in" running ass'y.

 

[gekog]

Re: 3.0 vs 3.0

Thanks...any comments about whether the new engine would run any quieter?

 

[DJ]

Re: 3.0 vs 3.0

gekog,<br /><br />Probably not. That line of engines was never accused of being quiet.<br /><br />Perhaps some engine box insulation is in order.

 

[gekog]

Re: 3.0 vs 3.0

I just reinsulated the engine box with about 2 inches of household fiberglass covered by the silver bubble type insulation used around hot water tanks etc. Is there something better I could be using?

 

[Bondo]

Re: 3.0 vs 3.0

What kind of Noises are you hearing ?????