Considering this, what … But if they’re annoying you while you’re going about your business, use our guide to find and fix the problem. I'm guessing its also hard to start or does it just do this when the engine has been running? A backfire is often caused during rapid deceleration, as the engine tries to bring its timing in line with the lowered throttle. This can be fixed by adjusting the carburetor for a richer mixture – consult your owners’ manual or have a professional adjust it.Sometimes the gasoline itself is the problem.

Written by Andrew T for LawnEq - The specialists for Lawn Mower Parts and Small Engine Parts. If it is bent Replace it. Lawnmowers shouldn't backfire when you're trying to start them. LawnEQ Copyright 2020, All Rights Reserved Safety And Maintenance Tips Concerning A Lawn MowerHow To Check And Change The Oil On A Lawn Mower With… Kubota’s latest RTV, the RTV-XG850, offers more speed, cargo space… Kubota Tractor Corporation, located in Grapevine, Texas, has introduced a… Kubota Tractor Corporation, a manufacturer of consumer lawn mowers and…Riding Lawn Mower Comparison: A Kubota T1880 Vs. A… When considering the purchase of a riding lawn mower most… Answer by 

These allow you to turn the engine off at any speed without excess fuel shooting into the muffler. If your lawn mower only backfires occasionally, I would not worry about it. You should take it in to be serviced (tune up) You need to check the key way.To do this requries the removel of the fly wheel.You will have too take the shroud off and then remove the cluch bearging. Gas containing alcohol ignites differently than non-alcohol gas, which means it could ignite in the muffler instead of the engine. - Craftsman Riding Mower

Lot more interesting detail … A lawnmower backfire makes a surprisingly loud noise, catching you off guard when you're wrapping up your yard work and shutting off the lawnmower. Slowing the speed gradually and allowing the motor to idle for 15 seconds before you turn off the mower can help reduce these backfires. I'd change the spark plug first. Post was not sent - check your email addresses!

When you notice backfiring occurring as you try to start the mower, take it in for professional repair before trying to start it again.Some mowers include special parts to help prevent backfires that occur after you've turned off the engine, called anti-afterfire solenoids. You can clean it up and then retest it for proper operation.If you need a professional lawn mower repair shop in your area, visit our

Now check the key. There is no worry about it blowing up, like in the movies.

Sometimes this valve will get stuck because of the fuel gelling up as the ethanol begins to separate from the gasoline.

Lack of proper ignition system maintenance can cause problems that ultimately lead to backfires.

The problem also could be the type of gasoline you're using. My lawn mower backfires from time to time and I am worried about it blowing up. The lean blend is then forced into the exhaust system due to incomplete combustion because of the mistiming, where it spontaneously combusts with the popping sound that is heard. When a flywheel is broken, your mower might stutter or backfire when you try to start it, but it won't completely engage. Getting the carburetor and muffler checked allows you to make adjustments as necessary.

Loss of spark is caused by anything that prevents coil voltage from jumping the electrode gap at the end of the spark plug. https://www.reviewinstitute.org/why-is-the-riding-lawn-mower-backfiring

Many mowers have safeguards in place to allow inexpensive items, such as flywheels, to break when the blade hits a large obstruction; these parts basically sacrifice themselves to save more expensive ones, such as the crankshaft. Backfire in engines is caused by simple chemical malfunctions that can be easily rectified. I have change the plugs air filter fuel filter and oil.