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Old 05-22-2010, 12:45 PM   #11
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Well everyone, thank you for all of your responses, but I don't have to worry about why it is overheating. Yesterday I replaced the thermostat and decided to take her out and try to see if it would overheat. It started and idled just fine, except I did notice it burning oil, which it didn't before. I took it out on the lake and brought the throttle up and there wasn't the power it had before. Also when it reached 3000 rpm's it started a loud clanking noise and wouldn't get any more than 4000 rpm's. I just backed it down and brought her back to the slip.
Sounds like a new engine is in order and I really don't have the $$ right now.

Anybody know of any good, cheap long block marine engines?
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Old 05-22-2010, 02:42 PM   #12
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sorry to hear about the engine going on you....sure puts a damper on your summer....

about the best I've heard for support on marine engines is Michiganmotors.com

I'm sure there are others but I can't remember them right now...I've known people go thru michigan motors and been very happy...

SP
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Old 05-22-2010, 02:55 PM   #13
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< no expert on engines at all, but a few things came to mind before throwing in the towel. If the power won't get above 4k rpms, maybe all 8 cyl's aren't sparking resulting in the loss of power, which may be resulting in the smell you're smelling ; unused gas being sent out of the exhaust ports (?). How new are the spark plugs, and are they gapped correctly? Changing them out may be one thing to try, certainly a lot cheaper than a new engine. Also in my novice diagnosis, are you seeing any oil leaking into the bilge indicating a crack in the block, and conversely is the exhaust blue indicating oil burning? I'm thinking the sound at higher rpm's may be rods hitting the oil cover possibly due to lack of oil, but it has to be going somewhere (?). Also may want to compression check the cylinders; maybe a piston ring on one or two is failing. ok, enough from this amateur, I just hate to see a few thousand $'s spent for something remedied for a few hundred $'s.
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Old 05-23-2010, 02:34 PM   #14
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Quote:
Originally Posted by tjwieseler View Post
Well everyone, thank you for all of your responses, but I don't have to worry about why it is overheating. Yesterday I replaced the thermostat and decided to take her out and try to see if it would overheat. It started and idled just fine, except I did notice it burning oil, which it didn't before. I took it out on the lake and brought the throttle up and there wasn't the power it had before. Also when it reached 3000 rpm's it started a loud clanking noise and wouldn't get any more than 4000 rpm's. I just backed it down and brought her back to the slip.
Sounds like a new engine is in order and I really don't have the $$ right now.

Anybody know of any good, cheap long block marine engines?
Another good rebuilder is doug russel marine http://www.dougrussell.com/Products/...cts&Category=6 , they offer pretty good prices on rebuilt and new mills both short and long although I would strongly suggest that you go with the block and heads together. otherwise its like putting powder on a pig.
good luck with getting back on the water.

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Old 05-23-2010, 05:45 PM   #15
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I read this first thing in the morning ..so my answer wasn't quite awake....first off..have you done a complete analysis and trouble shooting process to really find out what is going on???...might wanna do a compression check...pull plugs to see how they are burning..check gaps...check the distr. cap..rotor...wires...etc.....before throwing in the towel...do a complete trouble shooting process and get back too us...

SP
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Old 05-24-2010, 08:34 PM   #16
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i used a company called Jasper 1/800/827/7455 they sell out drives and motors, this is a motor exchange comp. it don't hurt to check prices !
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Old 05-28-2010, 09:18 PM   #17
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Hey SP, or anyone in the Washington area. I found two companies I am thinking about buying an engine from. They are S and J engines out of Spokane and US Engines out of Kent. Can any of you tell me anything about these companies. They both offer a good quality engine at a reasonable price. S and J has a 5.7L for my boat that would run 1518.00 plus core and shipping. US Engine offers one for 1925.00 plus core and shipping, but what intices me is they have a 300 HP 5.7 that would replace mine without any intake or fuel changes plus a 7 year warranty! They claim 25% less fuel usage.

Any help would be appreciated. They are a long ways from Des Moines, IA!!!
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Old 06-01-2010, 12:35 PM   #18
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25% less fuel usage compared to what TJ?

If I had to re-power I'd want to see a complete listing of the parts used in any rebuilt engine, to what tolerance the rotating assembly was balanced, as well as the torque curve of the engine.

You might also consider a 6.2/383 engine that is based on the 5.7/350. Same external dimensions but they come with sizable torque increase.

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Old 06-01-2010, 08:05 PM   #19
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25% less then the stock 5.7

Yes, I agree. I will see what they say. They do offer a 7 year guarantee, but they are 1500 miles away.

I would love to do the 383/6.2, but I don't think the Alpha One could take the horsepower and torque.
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Old 06-01-2010, 11:06 PM   #20
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Ah, you may be right regarding the A1 drive.

They are claiming their 5.7 is 25% more efficient than the stock 5.7? That's significant and in my mind suspect, so I would definitely want to know how they do that with no reduction in Tq.

Sorry, I know it seems I'm being negative, but the 7 Yr guarantee will be meaningless if they are 1500 miles away and that engine develops a health issue requiring removal and shipping. Do they cover the R&R and shipping cost? If you buy the engine from them, but someone else installs it, will you get caught up in a finger pointing contest between the installer and the builder saying the other caused the problem?

Just some things to consider.

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