If you need information on any model of Ford Lehman the best place to ask is American Diesel. The founder, Bob Smith, was one of the engineers at Lehman Brothers that designed the original marinization kits for the Ford base engines that became the FL120, 135, etc. Bob's son runs the company today, although Bob still makes regular appearances at the shop, and his son's knowledge of the engines seems to be every bit as thorough as his dad's.
Bob makes regular appearances at various trawler fests and owners gatherings like the Grand Banks owners rendezvous. He has an FL120 on a stand that he brings with him that he runs and uses to illustrate the various aspects of operating and maintaining these engines.
Also, the Grand Banks Owners Forum (* http://www.grandbanksowners.com
) has operating, maintenance, and parts manuals for the FL120 and other variants of this engine in PDF form in the "Manuals" section of the site. I believe you have to join the forum to access these, but so far the forum is free to join.
-- Edited by Marin at 13:03, 2008-06-28