How To Remove A Spark Plug From A Lawnmower

Replacing a spark plug for a lawn mower

Lawnmowers are basically engines with a lethal blade that spins around cutting grass as long equally at that place's gas in the engine and a spark plug that's combusting the fuel.

Just if your spark plug looks similar the one in a higher place and it's overworked and corroded, information technology's probably not firing properly and it's fourth dimension to replace it.

Yous tin can tell if your spark plug needs replacing can include:

You begin to hear:

rattling
pinging
'other' odd noises that suggest your mower'south engine is knocking.

You lot may likewise notice yous are using more fuel than you consider is normal for the functioning of your mower.

This is a key reason to ensure are spark plug is changed regularly every bit using backlog fuel costs you lot money and you could exist spending it on a chainsaw instead!

The classic problem is of form that the spark plug has failed and you lot cannot start the engine at all!

If the plug is misfiring, y'all may notice you lot may feel combustion is not efficiently happening. This occurs due to the aging of the plug.

As a spark plug ignites, there'south a 'gap', in which its reach occurs. This gap eventually widens as a result of repeated use under farthermost temperatures, normal wear, and tear. If the 'gap' is becoming as well large, the unit's efficiency declines and combustion becomes erratic.

How to supplant the spark plug in your lawnmower

When the engine is cool, remove the spark plug wire that connects the plug to the engine.
Clean any debris off the wire, ensure the metal is clean of rust etc.
Use a spark plug wrench to gently unscrew and remove the plug. If the plug is sunk in tight, do not use excessive force. A flake of CRC or WD40 style lubricant may help. Using the correct sized plug wrench is as well very important.
Employ a spark plug gauge to measure out the gap between the 2 electrodes and make sure the gap reflects the recommendation of your lawnmower manufacturer - cheque the user transmission.
With your hands, sub in the new correctly sized spark plug. Screw information technology in gently. Then with your wrench, finalize its position with a firm turn but not so the plug is in too tight.
Replace the spark wire, ensure it is correctly connected to the plug
Test you've installed it correct past turning on the engine. If it fails to ignite, check the spark wire is continued.

Here's a handy tutorial video on how to replace a spark plug:

What is the right spark plug for my lawnmower?

This was a proficient question to ask because even though several unlike spark plugs may screw into your mower, if it is not the correct blazon your engine volition probable suffer performance problems.

If you don't know off the top of your head what kind of spark plug is in your mower - look for the number on the ceramic and friction match it to the brand. The internet is your friend.

Indeed, you tin as well take the whole unit into a service agent or hardware shop and compare so you take similar for similar.

The best trick is to look at the user manual of the lawnmower for communication.

It is not imperative that utilize you use your mower brand'due south spark plug. You lot can utilize a generic substitute or another brand as long as the size and type are correct.

By and large speaking a tried and true brand similar a Briggs and Stratton spark plug will work well in most engines.

Battery-powered lawn mowers, like the Greenworks button mower, of course, practise not need plugs!

Need to change your lawnmower'south oil? You may demand to use an adaptable wrench.