A Warm welcome to you Wallis,
There's a few people on here who know more about these ones than myself, But I'll help you with what i do know.
The first two digits of the code, are your year, follower by the month, and day, So your engine was built on the 28th of July 1978.
The Type I dont know much about, its a more obsure reference to do with the coluor of the engine, etc.
The Model, 92502, would make it a 9 cubic inch engine (148cc) Vertical Shaft, with a Diaphram Carburetor (Pulsajet I Beleive) and a pnumatic Govenor (Air Vane) and Plain bearings, the starter should be a recoil starter on the top.
I'm sure our resident Briggs man, Grumpy, will be able to give you some more help with this one, and getting the spark working on it. In the meantime, is it possible you could get a few pictures up, as that always helps us work it all out!
Last edited by Mr Davis; 03/08/11 12:19 PM. Reason: eye had too ficks sum spelung errirs!