homepostsWhat spark plug does a Craftsman lawn mower use?

What spark plug does a Craftsman lawn mower use?

Dennis WaldenSep 13, 2021

Replacement Plug

The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .

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Furthermore, are all lawn mower spark plugs the same?

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.

One may also ask, how do I know which spark plug for 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.

Likewise, how do I know if my lawn mower spark plug is bad?

Here's How to Know if a Lawn Mower Spark Plug is Bad

  1. You can't get the engine to fire up at all.
  2. You have to tug extra hard for longer than usual on the rewind.
  3. Your lawn mower loses power while moving.
  4. The gas runs out quicker than it used to.

What happens if you put the wrong spark plug in your lawn mower?

Spark plugs that are gapped incorrectly can cause an engine to miss, or run erratically, especially during idle. The incorrect spark plug gaps can cause uneven firing of individual spark plugs and delay engine combustion; both of which can cause an engine to miss or idle erratically.

Are lawn mower spark plugs universal?

Spark plugs aren't universal; you have to make sure that you buy one that fits your mower. ... If you no longer have the manual or the number has rubbed off, you can always remove the plug first and take it to AutoZone with you.

How often do you change spark plugs in lawn mower?

every 25 hours

What kind of spark plug does a 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”

What do spark plugs do when going bad?

Common signs of faulty spark plugs include slow acceleration, loss of power, poor fuel economy, engine misfires, and difficulty starting the car.

What is the difference between RC12YC and rc14yc spark plug?

What is the difference between rc12yc and rc14yc spark plug? The higher number is a slightly hotter spark type plug. The RC14YC4 is now the standard plug for the 990/992 Generac engines. The 999 in the new 16-22kW Evolution (7000 series) units and older 20kW units are still using the cooler RC12YC4 plugs.

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.

Is spark plug RC12YX the same as RC12YC?

We can find no cross reference for RC12YX to any NGK number, but RC12YC does cross to NGK BCPR5ES .
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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.

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