Spark plugs are typically located on the back or side of a lawn mower engine. Look for a short wire that’s about 1/4-in. -thick leading to the top of a short, cylindrical protrusion from the engine. If you’re not sure where the spark plug is, consult your owner’s manual.
Where is the location of spark plug?
The spark plugs are typically located at the top of the cylinder head. The piston moves down the cylinder where it take in a combination of air and fuel. Next, the piston travels back up to the spark plug, compressing the mixture.
How do I know if my riding lawn mower spark plug is bad?
The more worn or dirty spark plugs are, the greater the tug on the rewind and more effort is required to produce an adequate spark. If you haven’t turned on your engine recently, your mower won’t start and/or you have to tug repeatedly on the rewind to start the engine, a damaged spark plug may be the culprit.
Do lawn mowers have spark plugs?
Perhaps your mower needs a new spark plug – the device that creates the electrical spark that ignites the fuel in your engine. If the spark plug is worn or bad, it can cause the mower to run rough or not start at all. Check the spark plug annually as part of your regular lawn mower maintenance.
What should a lawn mower spark plug look like?
Physical Appearance. Removing the spark plug and examining its appearance can give you further clues about whether or not it is time to replace the spark plug. Its center electrode should have a flat top. If its top is rounded, then the spark plug must be replaced.
Can I change my spark plugs myself?
Changing spark plugs takes about an hour (for a four-cylinder engine) and will save you at least a hundred bucks in labor if you do it yourself. In most cases it’s a simple job that will help to maintain peak performance and the highest possible gas mileage.
Will a bad spark plug cause a lawn mower not to start?
Examine the spark plug
A dirty or fouled spark plug can cause your lawn mower to not start. It can also work itself loose, causing issues. If the spark plug appears to be seated correctly but the engine doesn’t start, a new one may be in order. For a few dollars, this easy fix can get your small engine working again.
What happens when spark plugs go bad?
A bad spark plug will use fuel inefficiently, since it will sometimes perform an incomplete combustion, effectiely wasting the fuel it’s between commissioned to consume. This can decrease fuel economy by up to 30%. 6) Your car isn’t accelerating as it should.
Why is the lawn mower not starting?
Your Mower Won’t Start:
Other possible causes include: Loose, Dirty or Disconnected Spark Plug in Your Lawn Mower: Check it out, clean off debris, re-connect and tighten. Dirty Air Filter: Clean or replace. Fuel Not Reaching the Engine: Tap the side of the carburetor to help the flow of gas.
How often should you change the spark plug in a lawn mower?
For standard lawn mower and small engine maintenance, you should check and/or replace spark plugs: once a season. every 25 hours of use.