What could cause my Briggs and Stratton to be hunting and surging?

Answer by  NateB (571)

You could have spark plugs, a clogged fuel filter, bad spark plug wires, a bad shut off switch, and many other small problems.

Answer by  GreenSpider (79)

Check the air filter. If it blocked, clogged or dirty, remove it and either vacuum it clean, blow it out with compressed air or just replace it. Replace the spark plug or drain the gas tank and refill it with fresh gas. It may have had water in it.

Answer by  Mark89 (173)

It is likely that the surging is because of a fuel delivery problem. I would recommend replacing the fuel filter.

Answer by  biomajorUMW (33)

If its a surging like a sputtering then it could be anything from poor quality of gas to the maintaining of a spark. heck both.

Answer by  EDWIN1985 (24)

It starts with no problem but once it warms up at high idle it starts backfiring and running rough,and when I engage the PTO at high idle.