Does anyone have any manuals or specs on an Onan CCKB 20 H.P. engine? I wanted to give my new Catagator a tune-up. I already cleaned the carbs and wanted to check the points and timing as well. I thought that it was going to have a Kohler engine like most of the other ones I've seen online, but not this one. I'm not sure if this is good or bad, I know that the K622 that was used on these is impossible to get parts for, but the Onan might be in the same boat.