A surging lawn mower is one that will drive you crazy! It revs up and then revs down and does this repeatedly and won’t stop. No matter what you try it still keeps on surging.
There is one main reason all this surging is going on. It is caused by a lack of fuel and in some more rare cases, too much fuel. Surging is more common in the springtime after the mower has sat for a while. The fuel phase separates and solidifies in the jets and ports and starves out the engine.
Water in the fuel can also cause this surging. It also causes a popping sound when the fuel and water are ignited.
They key to resolving this issue is to have a really clean carburetor and fuel system. The fuel tank, the fuel lines and the carburetor must be cleaned thoroughly to ensure that the problem is resolved.
If the system cleaning does not resolve the problem, check around the carburetor where it attaches to the engine for air leaks. Check for a torn or missing intake gasket and make sure the bolts are tight that hold the carburetor on.
If you still have problems with your lawn mower surging, visit our locations page for a lawn mower repair service near you.