My machine starts easily but does not maintain fixed revs just keeps hunting up and down. Any ideas please.

Eddie, July 2008

Thanks pleasant, it runs like a dream now.

eddie, July 2008

Will be the carb diaphragm. Will need to remove the carb/tank assy, and then split the carb from the tank on a bench. Clean up the two halves and replace the diaphragm and gasket (comes as a kit from Briigs). Re-attach carb to tank- making sure you tighten the screws evenly and then re-attach to engine.

pleasant, July 2008