What makes a lawn mower engine surge

Before lawnmower storage — you should always add a good fuel stabilizer to the tank such as Sta-Bil — then fill the tank completely with fresh gas.

Next, run the mower engine for 2 minutes to circulate mixed gas through the engine. The fuel stabilizer will keep gas stable for up to 24 months. Bare patches in your grass lawn can be the result of many causes. The most prevalent being pet urine and bug infestation, both of which can be fixed in a jiffy.

Check out our article and learn how to plant grass seed in bare spots. Changing the oil on a lawnmower is actually quite easy. While lawnmower engines require some routine maintenance, they are usually a very dependable piece of outdoor equipment — considering the work and conditions that they perform in.

As with owning any equipment with a small engine, lawnmowers also have 3 basic requirements to ensure dependable performance. We hope this Mower Guide for solving lawn mower surging has been beneficial — and that one of our five solutions did the trick! Thanks for Visiting Besthomegear. I have a surging problem but I did all of the steps and the mower still surges after start-up and warming up the engine.

The mower just keeps surging. The engine has a new spark plug, new air filter, fresh fuel. Valve adjusted to manufactory specs and still surges. This vent is just large enough to allow air into the tank, creating enough backpressure to aid in fuel delivery to the carburetor. 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. How do you adjust the governor on a lawn mower? To adjust the governor, you would loosen the screw on the bottom of the governor arm and push the governor arm so the throttle is wide open.

Then you would turn the bottom "clip" which is connected to the governor shaft counter clockwise. This will set the governor shaft on top of the governor spool. How do you adjust the carburetor on a Briggs and Stratton lawn mower? Tighten the idle adjustment screw, found on the side of the carburetor, by turning it clockwise just to the point where you feel it lightly touching the seat of the carburetor.

Why does my generator surge? Is the engine still surging after fitting the new or cleaned air filter? Read on to get more troubleshooting tips.

This the most common cause of surging issues. Grime and dirt can gum up the internal components of your carburetor, making it fail to receive the correct flow of fuel. Solution: You can take your mower to a small engine repair shop to have the carburetor removed and cleaned. The fuel tank cap has a small hole, which allows air to flow into the tank and create back-pressure to help deliver fuel to the carburetor.

Dust or dirt can plug up this hole. Asked 7 years, 6 months ago. Active 3 years ago. Viewed 36k times. Any troubleshooting tips appreciated. Improve this question. Tester k 73 73 gold badges silver badges bronze badges. Once the engine is warm, does it run better? From the video, it seems that the choke just has to stay closed longer than normal.

Do you drain the fuel during the off season? If not, have you added any fuel stabilizers or other fuel additives? Plugged Idle circuit, needs to be given the gumout treatment. FiascoLabs can you elaborate? Tester, Yes -- after about 30 minutes of pulling, it seemed to run better. I did take out the air filter and dusted it off -- it surged without the filter on.

I haven't touched the spark plug. I think we drained the fuel. We didn't add any fuel additives.