After doing more research I’m pretty sure the model number is 409 and year of manufacture is 1932.That number is too big to be a serial number. A model 4092 is a is a 1935 Weedless Fisherman 4.0 HP.
Send pics of the ID plate and the whole motor.
Take your existing plug to any auto parts store. They should be able to look kit up and cross reference it if needed. Wire is sold by the foot and they should have that too. You'll need to solder it in to replace the ones you have now.Would you happen to know where I could purchase new spark plugs and wires for my 32 Sportwin 4 hp?