Hi all I have inherited a old briggs and stratton 11 hp synchro balanced I/C engine which came off a old westwood tractor mower. the carburettor is siezed solid and the main jet has been stripped so a new carburettor is needed am I correct in thinking the model number is 253707 code 85071511 type 0168-01. So should I look for a 253707 model carburettor. It has good compression clean oil and no metal flake in the oil also it has a good spark am I to belive this engine does not have points but a ignition coil ?. Its filthy but seems a good solid engine. I am building a pull behind mower so what thoughts please and a happy new year all