If answers are slow on this board, try the Ask A Member forum at www.aomci.org
For parts, try Laings Outboards, Twin City Outboards or Engine, Blade & Prop in Milwaukee. Most OMC dealers will be able to order parts, but some may not be able to reference the older part numbers.
NAPA auto parts has a marine parts catalog. I was able to order all the ignition system parts for my 1957 fleetwin from them. Also try www.sea-way.com I just ordered a new drive pin and rubber propeller cap from them. As far as diagrams, I would recomend getting a parts manual or a service manual which could probably be found on ebay and/or many other websites. Good Luck!
