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-   -   500 EFI question (https://www.offshoreonly.com/forums/general-boating-discussion/329546-500-efi-question.html)

tf2ttt 08-12-2015 11:26 AM


Originally Posted by 1MOSES1 (Post 4341801)
Just got finished with our top end rebuild. Based on what my builder told/showed me...I am glad we did. Valves had bad corrosion, springs were weak, and head gaskets were all but done. In my opinion at 300 hours they should be gone thru.

It now gives me piece of mind knowing better springs are in there, better lifters, new valves, etc. also get oppurtunity to inspect piston heads, bore, etc.

like someone already mentioned, once done can get another 300 hours out of them easily. What's that 7-10 years of boating. Not too bad IMO.

This is pretty much what I was thinking. You mind giving me idea how much that cost you?

Unlimited jd 08-12-2015 12:59 PM

5k per motor

airjunky 08-12-2015 01:54 PM

That 525 or 500 efi is going to bring that sweet cammed tube header sound to the table also. With aluminum heads ,mls gasket upgrade is more likely to come into your life should the day come that heads need to come off

airjunky 08-12-2015 01:55 PM

The improvement in looks alone over a efi mag motor almost justifies the price and maint premium

1MOSES1 08-12-2015 05:11 PM


Originally Posted by Unlimited jd (Post 4341857)
5k per motor

Listen to this guy...he's the one who did my motors.

Wildman_grafix 08-12-2015 06:46 PM

When you scan the motors on a 500EFI you get hours but not the break down of hours at which rpm.

ALL_IN! 08-13-2015 12:19 PM

You said you wanted something turn-key. Providing feedback from a friend of mine who believes blue motors are turn-key - along with some recent conversation I had with him about his blue motors.

I wasn't being a smarta$$.


Originally Posted by tf2ttt (Post 4341802)
I'm not sure how to respond to that so here's a bunny with a pancake on its head.

http://prhslibrary.com/pictures/bunn...ke-300x225.jpg


tf2ttt 08-13-2015 12:30 PM


Originally Posted by easyrider1340 (Post 4342310)
You said you wanted something turn-key. Providing feedback from a friend of mine who believes blue motors are turn-key - along with some recent conversation I had with him about his blue motors.

I wasn't being a smarta$$.

Sorry I was. When you said something along the line of same tank of gas I wasn't sure if you were joking about the whole post or not. Since I wasn't sure I posted a bunny with a pancake. ;)

Thanks for the feedback though. I was dead set against blue motors and was looking for 496 HOs, but it seems the 500s are much better than the 525s as far as issues go so I feel a little better about going with the 500. I've found a few Lightnings with 500s at around 250 hours so I think those should be turnkey for a year or two for me. At that point the general consensus is refresh the top ends which doesn't seem like a big deal. I've just heard so many horror stories about 525 header issues and then rebuilding motors at 300 hours, I don't think I want to mess with all that. The first time the wife wants to go boating and I tell her that sorry we can't because the motors are being rebuilt I'm going to be in big trouble. ;)

tf2ttt 08-13-2015 12:31 PM


Originally Posted by Wildman_grafix (Post 4342024)
When you scan the motors on a 500EFI you get hours but not the break down of hours at which rpm.

Oh I wasn't aware of that, thanks for the info that is good to know. I always see posts with breakdowns but now I think of it they were 496 HOs or 525s.

VoodooRob 08-13-2015 02:37 PM

You've been doing your research don't know if you are aware 500 EFI is rated 470 HP at the propshaft, 525 EFI is rated 525 at the propshaft.


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