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Old 08-26-2017, 08:08 AM
4stauffers 4stauffers is offline
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2014 6.2 x25 -- Bad Motor

I am in the process of purchasing a used x25 -- upon inspection the boat would not start, oil had water and the spark plugs were rusted - codes show it overheated 2x once at 190 and once at 220. I realize the motor is shot. This does have the salt water package. Any ideas on what a new long block would cost?
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Old 08-26-2017, 09:45 AM
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CruisinGA CruisinGA is offline
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Sounds like the head gasket blew or the heads cracked. Might be rebuildable depending on how bad internal rust is.


Here's a marine 6.2, not sure if it is exactly the same configuration that Ilmor uses.

http://www.michiganmotorz.com/377ci-...ent-p-545.html
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Old 08-26-2017, 10:05 AM
4stauffers 4stauffers is offline
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Illmor Motor

It is an Ilmor 6.2 Salt Water series
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Old 08-26-2017, 10:07 AM
4stauffers 4stauffers is offline
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Thanks -- IS it better to just buy new motor or rebuild? I do want it to be reliable.
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Old 08-26-2017, 10:18 AM
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My preference is to buy new if available.
I would call Michigan Motorz and see if they know if that 6.2 block is the same that Ilmor uses. Then all you have to do is swap over the intake/exhaust manifolds and accessories and reinstall.
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Old 08-26-2017, 11:34 AM
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Quote:
Originally Posted by 4stauffers View Post
I am in the process of purchasing a used x25 -- upon inspection the boat would not start, oil had water and the spark plugs were rusted - codes show it overheated 2x once at 190 and once at 220. I realize the motor is shot. This does have the salt water package. Any ideas on what a new long block would cost?
any indication why the motor overheated?
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Old 08-26-2017, 12:37 PM
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190 and 220 are not overheated, engines run this temp all the time, especially with the closed cooling system.

The oil and water is definitely an issue and would pull the heads and inspect for head gasket damage, trueness of the head and check the exhaust manifolds to makes sure that isn't another issue.
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Old 08-26-2017, 01:23 PM
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Water in the oil points to an exhaust manifold issue, coolant in the oil points to an internal issue. I would drain the oil and do a compression test before you write it off as a total loss.
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Old 08-26-2017, 01:30 PM
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Quote:
Originally Posted by CruisinGA View Post
Sounds like the head gasket blew or the heads cracked. Might be rebuildable depending on how bad internal rust is.


Here's a marine 6.2, not sure if it is exactly the same configuration that Ilmor uses.

http://www.michiganmotorz.com/377ci-...ent-p-545.html
That is not the engine ilmor uses - you need the gen 6 376ci engine. This one I believe is just a stroked 350
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Old 08-26-2017, 02:09 PM
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Ilmor also goes out of their way with internal components and would rather rebuild one of their setups then buy an off the shelf motor.
https://www.youtube.com/watch?v=b5Hsgbewtl4
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