P.S.
If you type in those serial numbers + Briggs & Stratton to Google you will get a parts catalogue with fabulous drawigs and identification of bits. If you dont get a spark at all, you might try fitting their magnetron retrofit electronic spark kit.
Meanwhile could you please look and tell me which way round the small pulley on the belt drive is. ie does the bush with the allen screw face away from the engine of towards it, and which way round is the head of the shaft key on this??
I have just got mine working but forgot this last detail
Thanks,
Briggy, March 2010