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Old 05-22-2011, 03:47 AM   #1
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Default Looking for some expert advice, Serial # 0F368185 is for a 5.7L Alpha

Looking for some expert advice.... I really messed up and missed a drain plug last fall and now the block is cracked internally and leaking water into the oil. It's a 1995 Maxum with a 5.7 merc.

Serial # 0F368185 is for a 5.7L Alpha engine that was built at MerCruiser on 7-7-94. This engine has 2 bolt main bearing caps, a cast iron camshaft and steel fuel pump and push rods. It was built with flat lifters.

My question is, can I run a newer (than 1995) marine engine and have everything bolt back up? Everything I'm reading about engines says 87-95 and then 96 and newer? What's the difference? I think the 1995 and newer are vortec so a short block probably would not accept my current intake, maybe not even the exhaust.... Please let me know your thoughts, pro/cons anything.
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Old 05-22-2011, 03:51 AM   #2
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Considering something like this.. just not sure the alpha drive will handle 420 HP?
http://cgi.ebay.com/ebaymotors/ws/eB...K%3AMEWAX%3AIT
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Old 05-22-2011, 05:42 AM   #3
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I changed my engine last summer. I have a 1997 2400scr with the 5.7 EFI non vortec. When I bought mine I was told that any 5.7 would work, but if you went to a vortec you would have to change the intake. Without changing the TBI and engine module the engine wouldn't have any more horsepower. The Alpha drive will only take 300 hp. I considered the 382 stroked but didn't want to spend the $
So I just replaced it with a non vortec 2 bolt main and roller lifters just like the OEM.

Purchased mine from S & J Engines out of Spokane WA, so far so good.
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Old 05-22-2011, 02:55 PM   #4
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oh man...sorry to hear about the engine cracks.....that's why we stress here to follow procedures and to winterize properly...with that said...

michigan motors makes a bunch of engines right for your spec....they specialize in merc's with a1g2 engine/drive combo...

so...here's the deal....replace it with an 5.7mpi/6.2ltr mpi engines...either one will bolt right up.....
take pic's ...we wanna see

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Old 05-22-2011, 07:31 PM   #5
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Multiple port injection? I'll need a computer, electronic fuel pump and god only knows what else to do that wont I?
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Old 05-22-2011, 11:12 PM   #6
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I don't know anything about these folks, but heres another option.

http://www.usmarineengine.com/mercru...ne-engine.html
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Old 05-22-2011, 11:53 PM   #7
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Michigan motors can be purchased complete....ready to drop in and go..


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Old 05-23-2011, 08:30 AM   #8
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I missed the plug on the bottom of the hose on my 5.7 last winter, but drained the other 4. It was just pure dumb luck there was no damage. I assume you missed one of the four block plugs? Sorry about yours.
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Old 05-23-2011, 01:41 PM   #9
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Is it just the block or do you need new heads. If I recall a short block is without the heads and a long block includes new heads. Both should allow you to re-use a majority of the parts (provided they're undamaged) from the old motor. A lot will depend on how mechanically inclined you are. If I recall, you did some extensive work with a Corsa switchable through hull exhaust. This 'might' be within your technical aptitude. I did a full replacement and went from carb to MPI and WOW what a difference. Of course a full package swap is significantly easier.
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Old 05-23-2011, 03:25 PM   #10
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Thanks for the replies everyone. It really does suck and I'm beating myself up a little. I know better and have winterized it correctly in the past. 3 kids going nuts can make you lose track of thing pretty easy.

That said, I have built several motors and I'm no stranger to a 350. I also have a 1970 Chevelle (fifth one) and almost thought about pulling the engine in that to put in the boat. However the cam is much too large and I'm sure it would suck water into the exhaust. Finding an engine around Omaha is not an issue. My primary question is will a 1996 and new motor bolt up the existing components. I'll my internals are still good, it still runs. (however I'm not going to start it again in this condition) I missed the plug between 3 and 5 above the oil pan in the center BTW....

Heads are also fine, just wondering if I should find a 95 block and swap the internals or buy a short block and make quick work of it.... cost to power is also a concern I don't mind spending more to get more. I love a loopy idle and I want more power. 300+

Shrew you are correct, the exhaust job was me Surprised no one else has tried it yet!!
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