Re: how to wire an old (mid 70's) 5 hp B&S engine ignition
I'd completely agree with this. Even though i can't say that that's the exact model number of the coil that fits on your block, these motor castings haven't changed in at least 35 years. Because of this, even the 70's motors can use current parts, and today's ignition parts are highly superior to the old points style systems. Unless you're a nostalgia fan, which i can understand, there's no other reason not to switch this thing over to use a new ignition system. The Magneto type coil has the same single wire coming off of it, but rather than connecting to points and a kill switch, it just connects to a kill switch.
I don't know if you're going to open it up, but if you find yourself pulling the oil pump apart, (or oil splasher if it's a side-shaft motor) you might want to replace that with new parts too.
If you do open it up, change all the gaskets and seals, and pop in some synthetic 4x4 blend oil in there, and that will greatly extend the life of the motor.
Post back if you have any more questions.
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