View Full Version : OMC FoMOCo model NUFM12AX Engine specs and data

09-15-2002, 11:05 AM
" Can anyone ID this setup.
OMC I/O engine has FOMOCO emblem cast in front cover. casting # on block is 681F6015DA. OMC exhast manifold. I can find no specs. or data on this engine. Carb on one sid and exhaust on the other. It is a marine engine installed and running. I cannot find any specs or data on this motor, it is in a 74 seaswirl, the outdrive is the old omc with thru transom steering cable.

OMC aluminum tag on cylinder head says Model NUFM12AX, Serial W155914 "

09-15-2002, 11:33 AM

Model NUFM12AX indicates it is a 90HP OMC Sterndrive from 1971.

We sell manuals for it. The service manual has specs, go to this link. ("")