Originally Posted by
Bill Van Steenwyk
I do not have an specific knowledge about this motor or this modification, BUT I did see a picture on this site in the last couple of days showing what was described at a modification on the "bridge" between the cylinders mentioned. Best of my recollection, it showed a place in the raised section of the bridge shown in the middle photo above that was ground away somewhat, possibly so as to allow the exhaust flow from the cylinders to mingle easier. I seem also to remember that the bridge was NOT ground away either the full depth or the full length of the bridge. Best I remember in the area of the dark spot just above the bridge in the middle photo.
Wish I could remember now on what thread I saw it but it was just a couple of days ago. Maybe one of "Fast Fred's threads or another about the 3 cyl OMC motor. Whether it is what you are looking for or will help, or hurt, I do not know.
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