I have searched and I thought some time ago I found the answers but can't seem to find it again.

Anyway, has anyone ever decoded the Briggs engine type codes? I have an engine that is

350447-1396-E1

I know what the 350447 is, but not the 1396-E1.

I doubt it is simply paint and decals as many other sites suggest - because, according to the Briggs web site, the model 350477 seems to have several carb variations (different part numbers).

Thanks