What could be wrong if my lawn mower runs but surges?

Answer by  Sky75 (216)

If lawn mower is surging check to make sure you have no water in the tank and have the carburator cleaned.

Answer by  malpoa (363)

The main reason behind this surging could be an unclean carburetor, clean all parts of the carburetor with compressed air and carburetor cleaner. Even the fuel line could be blocked. Clean the air cleaner. Also use new gas to operate lawn mower as the current one you are using might be contaminated.

Answer by  Anonymous

Sound's like a Governer Spring Issue to Me

Answer by  les59 (852)

If you're engine is surging, like waivering while running, it sounds like a gas to air combination issue. You may want to check your air filter and make sure that the mower is mixing the gas with the air properly for ignition. You can also run the choke longer.