I’m guessing that you have a Briggs and Stratton engine ? If so, stamped into the blower housing ( the shroud that carries the recoil starter) you should find the words Model, Type and Code. Below each word you should find a series of numbers. Assuming thayour engine still has the original housing, those numbers will identify it right down to the day it was made and even the production shift.
This will determine the coil that you need. Pre ‘79 it is likely to be a points ignition magneto – that is, under the flywheel will be contact breaker points and a condenser. The good news is that a modern Magnetron, electronic ignition coil may be fitted, without having to dig around under the flywheel. Even better, most small engine / mower repair shops will have a box of good coils removed from scrap engines .
Example only, your numbers will probably be on the vertical face behind the carburettor.
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