Bruce wrote in message . ..
I have a lawn mower with a Briggs & Stratton 5HP Quantum I/C engine
that suddenly developed problems.

There is a golden rule:

Always Start With the Stupid Stuff.

Change the plugs.

Change the fuel line.

Change the fuel.

Check the oil.



Almost sounds to me like a pinhole in the fuel line. Sucking air, not
getting enough gas. Check it all the way back to the tank, and check
that little filter on the end (if there is one). If it was plugged, it
would do what you describe.

DJ