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DonCig
08-29-2005, 07:22 AM
How do I identify which model of ECM was used on my engine?
MEFI-1, MEFI-2, MEFI-3

1997 Mercury 350 Magnum EFI MPI Gen +

I have checked the manuals without any luck.

It appears that my ECM carries the Mec. Part # of 860250T1

Thanks,

DonCig

txtaz
08-29-2005, 09:20 AM
Sorry Don, My manual covers 1998 and above. MEFI1 and MEFI2 boxes look the same. MEFI3 has upturned connections at the ends for the plugs (not straight in). I would have to pull mine out to get the part number, which I would do, but I have a lovely extraction appointment. Look for funny posts this afternoon.
Wes

Dave_N
08-29-2005, 10:06 AM
Would not be a MEFI3, Could be a 1 or 2. A scan tool will tell you if it's a 1 or 2, and the Calibration Checksum.

Dave

Mr X
08-29-2005, 10:18 AM
The engine serial number would say on Mercnet.

I now have a way to look it up if you want me to.

DonCig
08-29-2005, 09:18 PM
Ted, I just sent you an email with my engine serial # and my drive serial #.

Can you run them thru the computer and let me know the results?

Thanks,

Don