Where is the spark plug on my lawn mower?
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.
Then, what are the symptoms of a bad spark plug on a lawn mower?
Faulty spark plug warning signs
- The engine requires repeated attempts to start or the engine won't start at all.
- The engine misfires or runs rough.
- The engine starts, but stalls shortly after.
- There is a noticeable increase in fuel consumption during normal equipment use.
When it does fail, it is usually due to heat caused from improper wiring of the ground wire to battery voltage. If the engine does not produce spark, other areas of the ignition system should be checked before focusing on the ignition module as source of failure (see above).
Correspondingly, what size socket do I need for a spark plug?
Most spark plugs require a 5/8" (16mm) size spark plug socket. This refers to the size of the flats on the spark plug that are in contact with the socket.
How do I service my Ariens lawn mower?
- Rattling, pinging or “knock”-like noises. When spark plugs begin to misfire, you may notice unusual noises from the force of the pistons and combustion not working properly. ...
- Hard vehicle start. ...
- Reduced performance. ...
- Poor fuel economy.