Re: 1953 Firestone 7.5/ No spark
Actually, I don't. I have used at least one brand called the "Atom" module, but there are improved ones now available. Ebay seems to be the best place to find them as many small engine suppliers advertise there. Just do a search for "ignition module". Ignore all the ones that are model specific (i.e. Homelite, Briggs, etc.)....you want a general application unit, one for each spark plug, preferably with a ribbed metal case. The ad info usually states they are a replacement for almost all small engines. They're quite small and easy to install since it looks like your flywheel is off already. Just follow the instructions. The only change I've made is to solder and insulate the wire connections rather than use the wire nut they provide. I've noticed that the spark seems a bit smaller than when the regular points are used, but it is CONSISTENT which is even more important.
Another tip: after restoring your spark, clamp the motor to a support with the lower end in a five gallon bucket of water (never start an ouboard without water). Assuming the carb and fuel system haven't been examined yet, use a spray bottle of the correct gas/oil mixture and shoot a couple of sqirts into the carb. Set the controls to "start" and crank 'er over. If everything's right it should roar to life in one or two pulls. Now you know she'll run and can go through the fuel system and clean it out.
Now that you have everything set (spark, clean carb/fuel system) start it again (in water) and see if it discharges water, showing that you have cooling circulation. If there is none, shut it down immediately and find out why. Usually the impeller is shot from age or the water passages are plugged with everything from old weeds to spiders and monofiliment. You HAVE to have cooling water circulating or the poor thing will get toasted. Most outboard restorers replace the impeller right away, just to be sure.
Whew! After typing all of that, my final comment is that the Scott Atwaters were some of the nicest looking motors of the fifties. Clean and kind of sexy. Oh, you asked if you got your money's worth...definately not. They're absolute junk, so you'd better box it up and send it to me before your wife finds out you spent money on it.
Edit: the previous poster is absolutely correct. Points and so on are available, but they may cost a bit. My solution was aimed at getting a motor running reliably when parts are hard to find. I usually save the old points and keep them in a labeled baggie for any future owners.
