I need a 500EFI circulating pump. The merc # is 811573A04. Same pump on 525EFI

good morning i happen to have a brand new one in stock i can sell it to you for 276.60 email us or call us at 954-237-0332 if interested Julio

HELLO, I HAVE ONE ON EBAY WITH THE BLUE ANODIZED PULLEY IT HAS AROUND 35 HOURS ON IT FRESH WATER ONLY HERE IS THE Item number: 200275901749
MARTY

Hello Cat man do,
Yes, I called you the other week when I learned that you had some 500EFI parts. But you asked $150 for the pump and I offered $50 as I only need the pump, not the pulley or hose. There is a new one on ebay for $99 plus freight. Let me know if you want to sell just the pump for $50 plus freight.
Thank you,

Nappa has has the same pumps with there name on it. just bought 2.

Is a 454 Mag pump the same besides color. GM #12553843 I'll sell it for $50

Hello Velocity Tom,
Thanks, I was told that Nappa has the same pump except that theirs does not have the stainless steel plate and the pump impeller is not bronze. But I have not been able to confirm this.

Hello RBeyer,
I checked the part numbers through Merc and they are different part number (500EFI pump is 811573A04, 454 Mag pump is 8504541). So I think they are different.