I have a 1940-1960 era 3 to 3.5 hp horizontal shaft B&S engine. It
doesn't have any model / type markings anywhere on it. No label and
nothing stamped in the flywheel cover. It's original color is a
brown/bronze. I need the model number to get a replacement plunger
for the ignition system. Any help would be greatly appreciated.

Thanks,

Walter