"I have owned several Sears ou
"I have owned several Sears outboards over the years (Early to mid 70s models), and wish I had better news for you. The small air cooled single cylinder's weren't too bad, but were not as reliable as a "name brand" outboard. They seemed to rattle themselves apart a bit more than an OMC or Mercury equivalent. Note they cost 1/2 the price though. Parts for the engine's on these can still be purchased at your local sears store and other places as well as they were made by Techumseh. I have had 3 9.9's from the late 70's, and all had problems with the electronic ignition's. I have searched recently for a replacement ignition for these motors, and they are no longer manufactured. Some people have had success converting them to a conventional ignition however. The 15 HP of the same era was identical and had the same problem.
From my list of Sears Gamefisher (and Eska's, which were identical) motors, I have one running 9.9 that I'm waiting for the ignition to blow in, and 2 spares with no ignition, and one running air cooled single, with 5 spares that may or may not be able to be fixed for a decent price. In defense of the single's, the running motor was purchased new in 1975 by my father, and still runs, the others were donated after they died on the previous owner.
By your post, it looks like you have a line on one. On the positive side, the chassis and drive train seem to be fine, and the motors are incredibly easy to work on if needed, especially the singles."