FormulaM2Formula

Hi All,

I haven't been able to find a closed cooling upgrade kit for the HP500 EFI from Mercruiser. One idea I had was that the HP525 EFI and HP500EFI are both very similar in exterior looks. I'm guessing that it might be possible to buy a set of parts that fit the HP525 and use them to install closed cooling system on the HP500.

Would someone with HP525 EFI engines be willing to send me a serial # from one of their engines? I can use the # to order a service manual and parts list for the HP525 and start researching whether this might be possible.

If you know of a closed cooling upgrade kit part # for the HP500 EFI, that would be even better.

Thanks,
Garrett

offthefront

iTrader: (1)

Prob be a LOT cheaper to go Aftermarket ....

Audiofn

There are aftermarket kits for this that have been talked about on OSO. I wold post this in the General Discusion area.

Jon

offthefront

iTrader: (1)

Garrett .. i was looking at some just the other nite that were nice ... I'll try to remember and post the site .m

FormulaM2Formula

Thanks! Any pointers will be greatly appreciated. I can't find anything on the internet.
Garrett

lonestar382

Innovation Marine in Sarasota FL, does a great job with closed cooling on their setups. They have rebuilt some 500efis that I have seen with closed cooling, and it looks amazing. I'll email you their number tomorrow.

Corey

FormulaM2Formula

Thanks Corey for the pointer. I gave them a call today. They don't have a kit for the HP500 at the moment. I talked to Scott. He did say that they have gotten several calls concerning a kit for this motor and they have someone looking at what could be done. Anything they could sell me right now would require me to do a significant amount of work to get it all plumbed in as it wouldn't be a "bolt on" type of kit.

I left them my number. They said they would give me a call back and let me know what they come up with. I'll keep you all posted.

Garrett

LAKE EFFECT

FYI

The HP500 and HP500efi use cast iron heads, while the HP525 uses a aluminum head with water ports on the faces of the heads where the heat exchanger is plumbed too. Now I'm going off memory(of 525's i've seen), but I'm 99% sure this is how there setup. So a HP525 setup wouldn't work anyways.
LE