Hi johnando,

I feel that your governor spring is too tight or fowling on something and thus is causing the engine to idle way too fast.

I gather your engine is a Briggs and Stratton unit that was built on the 15th of April 1977.

Some close up photos of the carby area would be a massive help, also some generalised shots of the mower.

Cheers,
BB

I live a 24 Hour lifestyle, but every now and again I seem to fall asleep, well at least that's what my wife tells me.