I have two oem mecrury ECM"S for Merc HP 500 EFI motors that have been re programed for better performance on a basic stock motor and have a raised 5600 rpm rev limit in them now. I purchased these through Fountian Power Boats. These are in the original merc Quicksilver parts box # 840136T 2 . They have been used on my boat but I have sold the boat and no longer need them . I gained 3-4 mph and a much better idle it no longer blacked the hull like the oem ones did at idle. I will sell these ecm's for $ 450.00 for the PAIR including insured shipping . If intersted e mail me at [email protected] I will accept Check , Money Order or Paypal Thanks, Tom Jordan ecm's sold------sold-------sold!!!!!!!!!!!!!!!!

What are the numbers on the back? Not the serial number, but the one above it on the left hand side of the sticker.

on the back there is a Delphi bar code sticker and the number above the bar code on the left is 16237009 if that helps you any,

Thanks, but I have some of those already.

Gained 4 mph? is this possible?

Remember thats the oem sticker numbers the program inside HAS been changed from what was originaly in them, They have a sticker added to them with the # D906 which is a up dated program number from a after marker tuning service I supect!

you have these already ? What did they do for you?

Sent you a email

Must off been spare parts from the F-1/F-2 days