This is all I can find on the engine
BRIGGS & STRATTON PPROFESSIONAL SERIES 500cc 19.5 hp
then on a white strip on front of engine
engine family ABSXS.5002VP 279222
EU e11*97/68SA*2004/26*0333*03
Displacement: 500cc ECS: EM
EPA Compliance Period CAT: C
DOM: February 1010
I had adjusted the valves according to the manual, but the manual did not list any professional series. Should not have made a difference. There are not many hours on the engine.
Hope this helps
Thanks
Alton
