Re: Ted Williams 7.5
That may be one of the solid state ignition Tecumsehs. Does it have an exterior coil attached to the cylinder head? If so, it's a solid state ignition. If not, then it's a standard magneto engine with points.
Good luck if it's the solid state engine. Parts are simply not available for them, and the used market is dried up from people buying all the coils to keep their engines running.
You can find a new coil for about $120, but the stuff under the flywheel is simply not available. I know, because I have a 9.9 hp model, and have been looking for months.