Go to http://www.briggsandstratton.com/ where you can download a manual for
your particular model using the engine model #.

"Herbert Nagler" wrote in message
...
My mower engine blubbers (misses a beat once every 2 seconds or so). It
seems to get worse, when it gets warmer. There used to be air-mixture
adjustment screws on earlier models, can't find any on this new one. Can
anyone give me any hints, before I take it to the mechanics?

Thanks
H.N.