mercruiser 5.0 - upgradable to 5.7 ?

[jsmith3102]

I have a 1994 mercruiser 5.0 can I just buy a long block 5.7 and put all my stuff off my old 5.0 on it?

I was also leaning toward a new 2008 long block vs a rebuilt... Thoughts?

Anyone know if I will really tell the difference in power?

 

[Fishermark]

Re: mercruiser 5.0 - upgradable to 5.7 ?

You can easily put a 5.7 in place of a 5 liter. A 94 will have a one piece main already. Just keep it within the same basic features (one piece main - vs - two piece, etc) and you will have no problems.

 

[Bondo]

Re: mercruiser 5.0 - upgradable to 5.7 ?

Anyone know if I will really tell the difference in power?

Ayuh,....

You'll also need a new Intake,+ Carb,...

But Yes,... It'll be Noticeable.....

 

[krisnowicki]

Re: mercruiser 5.0 - upgradable to 5.7 ?

I am not sure what kind of boat you are working with but i did the same thing last year but backwards I found a deal to good to miss on a 5.0 and my 5.7 decided it was going to ingest water. So I got a outdrive (alpha 1 gen 1) and a complete 5.0 for 600 from a friend. I put it in and let me tell you. I lost 4 inches in prop pitch just to get on plane I went from a 21 to a 17 and to wake board I need a 15 that translates to about 15 miles and hour on the top end and I miss it. As someone told me when I did this switch the 305 is a dog compared to the 350

 

[dan t.]

Re: mercruiser 5.0 - upgradable to 5.7 ?

everything from your 305 will fit a 350 tbi one piece rear main engine ,you may need to rejet your carb . i would try a good run and check the plug colour, if they are a light tan colour and the motor doesnt ping leave it alone. if the plugs are white or it pings ,rejet to 350 specs. a 2008 engine will be a vortec and will require a different intake,distributor gear,and an electric fuel pump

 

[Uraijit]

Re: mercruiser 5.0 - upgradable to 5.7 ?

Just bolt all your old stuff on there, and you're good to go. I'd ditch the 305 as quickly as possible...

 

[alex3012red]

Re: mercruiser 5.0 - upgradable to 5.7 ?

Do you have to do anything to the outdrive, how much hp with a 350 with 2barrel carb. Anybody have this set up.(rochester)

 

[Don S]

Re: mercruiser 5.0 - upgradable to 5.7 ?

If you have a question, start a new thread, don't just tack onto someone elses old thread with a new question. The archives are for reading, not posting to.