Riding Lawn Mower Spark Plug Not Firing

Lawn mower coils give lots of problems i replace tons of them.

Riding lawn mower spark plug not firing.

Fuel can be considered old if it s been in your mower for a month or more. How to check if lawn mower spark plug is firing with a spark plug tester a spark plug tester is a convenient and secure way to check plug ignition spark. If your engine is misfiring stop the engine and let it cool for 20 30 minutes before removing the spark plug to check for wear or corrosion. Why the spark plug won t fire on a lawn mower.

There is a wire connected to the coil make sure the wire is not cut or resting on the engine block causing it to ground out the coil. If the spark plug is no longer firing or corroded with residue and cannot produce a strong enough current to properly spark the fuel the engine may misfire or completely stop running altogether. A proper spark is just as critical as fuel and air when it comes to a riding mower operating efficiently. A spark plug should be changed once every year at the start of the new season.

A simple check is to remove the wire from the coil and turn the engine over and check for spark if it has spark the coil is good. When a spark jumps across the spark plug s. Can a spark plug have bad spark. When you leave old fuel in your lawn mower it can be hard on it.

The plug is an. Quick video on how to check for spark plug fire in any small engine or any engine for that matter. The cost of a magneto is not that bad you can expect to pay 20 on push mowers to 50 on lawn tractors. When the spark plug doesn t fire or fires intermittently your lawn mower engine won t start or if it does start it will stall.

My riding mower doesn t have any spark. Check the spark plug wire for cuts. You can check the spark plug for spark by removing it connecting the plug wire grounding it off the engine and turning. Clean the spark plug with carburetor cleaner and allow it to dry before attempting to fire again.

Unlike automotive engines the wire to the spark plug is normally attached to the magneto and is not replaceable if you have damage to your plug wire you will probably need to replace everything. Yes spark plugs do wear out.