Why does my Honda mower keep surging?
The most common reason for a surging lawn mower engine is a blockage in the fuel supply, but there are other possibilities: Bad gas. Bad spark plug. Dirty / faulty carburetor.
Why does my Honda mower rev up and down?
A lawnmower that hunts and surges may be experiencing something as simple as an airflow issue. If the air that the engine requires to run is blocked, especially sporadically, it can cause the engine to slow down. When the blockage moves or clears, the engine may suddenly rev up in response.
What causes an engine to surge up and down?
If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.
How do I stop my lawn mower from surging?
A thin coating of engine oil on foam filters typically helps them attract dirt that could end up in your carburetor. Paper filters, however, only use their pleated medium to catch dirt and dust. An air filter is a quick fix that should be your first stop when troubleshooting a surging lawn mower.
Can bad spark plugs cause engine surging?
3. Surging and Lagging. Another good indication that your spark plugs are dirty or worn is if your vehicle experiences surges of speed, resulting in a jerking acceleration. These surges occur because your spark plugs are not igniting the fuel in your engine at the proper rate, resulting in an uneven speed.
Why does my lawn mower surge?
Problems in the Fuel System Check and clean the vent. Surging is also caused by water that got into the fuel. A mower left in a heavy rain or condensation on a hot summer day can choke the engine. Empty the gas tank, properly dispose of the old fuel and try a fresh batch of gasoline.
Why does my Honda surge?
Honda uses most of those same components to determine idle in their vehicle. However, they use a fast idle valve that has engine coolant running through it. The fast idle valve has a reasonably high failure rate. When the valve fails, it causes idle surge.
What causes a Honda lawn mower engine to surging?
If your mower engine is a Honda or Kohler, surging is commonly caused by a blocked idle jet see Gas starvation towards the end of the page. If you need more help, check out the “How to fix a surging mower video”. If your surging mower is a Honda, check out the “Honda mower surging video”. Briggs & Stratton Surging
What kind of engine does a Honda lawn mower have?
If your surging mower is a Honda, check out the “Honda mower surging video”. Surging B&S Classic 450, 500 or 550Some engine types are famous for surging, the Briggs & Stratton 450, 500 and 550 series engines are fitted with a metal fuel tank and priming bulb style carburetor.
Why does my lawn mower sound like it is surging?
Surging is also caused by water that got into the fuel. A mower left in a heavy rain or condensation on a hot summer day can choke the engine. Empty the gas tank, properly dispose of the old fuel and try a fresh batch of gasoline.
What kind of engine does a Briggs and Stratton lawn mower have?
Surging Mower Engine Surging B&S Classic 450, 500 or 550 Some engine types are famous for surging, the Briggs & Stratton 450, 500 and 550 series engines are fitted with a metal fuel tank and priming bulb style carburetor. If you have one of these type engines and it’s surging – You’re in the right place.