Is it possible to convert the 500efi's to the closed loop cooling like the 525s? Has anyone done this ? How hard would it be?

You cant install a kit from a 525 on a 500 EFI. However, you can easily install a kit from a 454 Magnum MPI on a 500 EFI.

must be some aftermarket stuff outhere I have closed cooling on my 92 model 502 mags... been on there since new...

ok next question , does anyone know where i can find a couple of systems?

I would suggest using Bam Marine. Mark is great to deal with.

http://www.mercruiserparts.com/Show_...sp?dnbr=824418 98&ivar=images/CRUISER/824418.98/14.png&inbr=2690&bnbr=150&bdesc=CLOSED+COOLING+SYS TEM

link not working for me...

i tried to attach the link again, still wont work. I dont know why... Sorry

If you want to send me your direct e-mail address, maybe I can send you the link directly.

How about here: :-).

http://www.mrcool.us/products/kits/m...ll-system.html

We sell these kits. If you're running a higher HP, I can help resize the cooler for you as well. The hose routing is pretty static. Call us at 248=960-7850 so we can get the particulars. Installing the right kit is not that hard. Installing the wrong kit would not be enjoyable.

Russ

I was always told if you put closed cooled on
a motor that never had it that the antefreeze
would loosen the scale up inside and clog it up,
dont know if that true or not.

if someone knows of this , please chime in. THe Motors are suppose to have a hundred hours on them , and freshwater . I am on the coast and it will now be 50/50 salt and fresh . Just read on the horror stories of the CMI's failing and dont want the extra boost of salt helping with that.