Why Can My Lawn for example in San Diego Mower Backfire & the Exhaust Pipe Get Red Hot?

It can be disconcerting to hear the loud bangs of backfiring added to the sounds of search engine operation, but you do not have to worry that they’re harming your lawn (Salt Lake City, UT) mower. The muffler becomes hot when backfiring happens inside it since combustible material is igniting. The material usually comes through the motor’s exhaust port, and it’s the end result of poor combustion in the combustion chamber.

Lawn Mower Engine Operation

Although some lawn in Salt Lake City mowers have four-cycle engines, most are two-cycle ones, meaning the piston that turns the crankshaft has a power stroke and an exhaust stroke. At the beginning of the power stroke, the spark plug ignites the fuel, which leads to the production of gases that must be eliminated through the exhaust port before the following ignition occurs. The fuel can burn inefficiently for lots of reasons, permitting flammable gases to exit the engine, and if the temperature in the muffler becomes high enough, the gases can ignite there and also cause backfiring or after-firing, which happens after you give up the engine.

Smoking and Alcohol

Among the chief reasons why unburned gases exit together with the exhaust is because there’s too much fuel in the combustion chamber in the first location. This can happen when the carburetor is adjusted to make a fuel and air mixture that is too rich. Another reason is that the spark plug is either weak or misfiring. Bad combustion compounds this issue fast, because carbon deposits gather on the spark plug and impair its operation further. Both conditions create smoke. Alcohol in the fuel helps to increase the exhaust temperature, since it burns hotter and faster than gasoline, and the extra heat ignites the smoky exhaust gases.

Working Too Hard

Your lawnmower can backfire because you are working it too difficult, either by cutting Grass Care cheap Littleton that is too long or running it with dull blades. This can slow the movement of the piston, which falls slightly out of phase with the fire cycle of the spark plug. As a result, some of the fuel does not get a chance to burn, and it leaves the exhaust port. After ignition begins from the muffler, the backfiring is very likely to continue due to the higher temperatures there. The perfect method to prevent the backfiring is to block the mower, then allow it to cool down and sharpen the blade, if needed.

Making Things Right

Regular maintenance of your lawn in Salt Lake City mower should include sharpening the blade, cleaning or replacing the spark plug in and cleaning the air filter to ensure proper air flow through the combustion chamber. Moreover, you should fix the carburetor screws periodically to ensure the motor is burning the correct fuel mixture. Most lawn for example in Salt Lake City mower manufacturers specify the use of fuel which includes no more than 10 percent ethanol, but if backfiring is a persistent issue, avoid fuel with ethanol. If your lawnmower has a spark arrestor, you should also clean it regularly. It collects carbon deposits from the motor, and because it’s behind the muffler, it can also bring about backfiring.