homepostsHow do I know which spark plug for my lawn mower?

How do I know which spark plug for my lawn mower?

Dennis WaldenSep 13, 2021

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.

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Thereof, what gap should my lawn mower spark plug be?

between 0.028 and 0.031 inches

Also question is, how do you match spark plugs? Replacement spark plugs must be the same size as the original (same hex size, diameter, thread pitch and length), and have a similar “heat range” (hot enough to resist fouling when the plug is cold, and cool enough to resist pre-ignition when the plug is hot).

Then, what spark plug do I need for my Briggs and Stratton?

Flathead Engine Spark Plugs & Gaps

Replacement Part TypeBriggs & Stratton Spark Plug Part NumberSpark Plug Gap
Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC)696202 5066 (5066D, 5066H).030”
Resistor Spark plug - hotter spark (Replaces Champion RC14YC)496018S 5092.030”
Resistor692051.020”

Are all spark plugs the same for lawn mowers?

Yes there are different plugs for different engines. Usually you need the engine model on your mower, and take in the old spark plug to the hardware store. Ask for someone to help you find the right spark plug and tell them your engine model and mower model.

Will a lawn mower start with a bad 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.

How can you tell when a spark plug is bad?

What signs are there that your spark plugs are failing?
  1. Your car is a rough starter. ...
  2. Your car is a rough idler. ...
  3. Your engine will sometimes misfire. ...
  4. Your engine surges. ...
  5. Your fuel consumption is higher than usual. ...
  6. Your car isn't accelerating as it should.

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.

Does it matter what kind of spark plugs you use?

The most important detail in a spark plug is matching your engine's design. Copper has high conductivity and low price, but also a shorter lifespan. Harder platinum and iridium cost more, but were designed to last longer, but remember, the best fit is always the one designed for your engine.

How often should spark plugs be changed?

every 30,000 miles

Which type of spark plug is best?

NGK 6619 Iridium IX Spark Plugs snagged the top pick in our spark plug comparison because they offered the best mix of high-performance, fuel efficiency, durability, and dependability. Featuring an iridium construction, these high-quality spark plugs provide a longer lifespan than copper and platinum spark plugs.
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About The Author

Dennis Walden

Dennis owns a small farm and loves to grill since his early childhood. He’s a professional cook, but hiking and enjoying the great outdoors is his no less favorite part of life.