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Old 09-16-2019, 02:34 PM
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Swapping an Indmar LY6 for an Ilmor engine - crazy or not?

Without going into the long background story, I am considering yanking the Indmar LY6 out of my 2011 X25 and starting over with a new Ilmor engine. MasterCraft made the engine supplier switch that year so I know there are 2011 X25s out there with the same B I G Viper instrument panel and an Ilmor engine. I have seen 5.7 and 6.0 Ilmors in various X25 threads.

Aside from the substantial cost, what other considerations would there be? Would I need a new transmission as well?

Thanks in advance.


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Old 09-16-2019, 03:03 PM
88 PS190 88 PS190 is offline
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My main concern would be if you have a local dealer who can make sure all the software stuff works properly/knows how to deal with issues if it doesn't.

Not sure if the BIG screen runs the same software.
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Old 09-16-2019, 03:31 PM
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But why?
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Old 09-16-2019, 04:41 PM
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Quote:
Originally Posted by 88 PS190 View Post
My main concern would be if you have a local dealer who can make sure all the software stuff works properly/knows how to deal with issues if it doesn't.

Not sure if the BIG screen runs the same software.


Thanks - I would definitely have an MC dealer do the work. I have seen plenty of BIG screen/Ilmor engine combos so I have to believe mine would be compatible with any Ilmor specific software though I hate to write the phase “I have to assume”...


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Old 09-16-2019, 04:42 PM
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But why?


Please re-read opening sentence of my post.


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Old 09-16-2019, 05:15 PM
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So its my understanding that the dash only translates in information given to it by the PCM, and whatever motor swap you do will have the same MEFI5 PCM. It would probably be best to purchase the trans and motor together and sell what you have the same. There is a CSX in the classifieds that made the same Indmar to Ilmor swap so it is possible, bonus that your boat it was an option.

In the end it's probably cheaper to sell your boat and get one with the motor you want, but in the end that's your call to make.
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Old 09-16-2019, 05:35 PM
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besides being new, you want to swap a ly6 with an identical ly6, finished by a different supplier of the same engine. I think it would just be a swap of the long block and you’d be done as long as you are already drive by wire
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Old 09-16-2019, 05:46 PM
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But why?
It's a secret....
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Old 09-16-2019, 08:01 PM
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It's a secret....


Haha, it’s not a secret but it’s worthy of its own thread and I was trying to avoid 6 different tangents in the same post.


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Old 09-16-2019, 08:07 PM
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Originally Posted by 1redTA View Post
besides being new, you want to swap a ly6 with an identical ly6, finished by a different supplier of the same engine. I think it would just be a swap of the long block and you’d be done as long as you are already drive by wire


Sorry, I’m not understanding your first sentence. What do you mean “besides being new”? I don’t believe LY6 engines are available anymore but I might be ignorant on the naming conventions.


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