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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Accordingly, 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 .

Also question is, what spark plug does my mower take? Ideally, most automobile spark plugs use a thread size of about 14mm thread why those of lawn mower range between 10 to 12 mm. Because of these differences in thread sizes, they just won't fit into the same hole or the unit in which the plug is to be fit in.

Then, what size spark plug does a craftsman?

The Craftsman 4 piece spark plug socket set features the following sizes: 5/8, 3/4, 13/16 inch and 18mm. Each one has 6 contact points, is high quality and versatile.

Do lawn mower spark plugs come pre gapped?

Check the gap on the new spark plug before installing it. A new plug will often come pre-gapped to match your specific engine, but use a spark plug gauge to verify that it matches the manufacturer's specifications.

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.

What can I use to clean my spark plugs?

To safely clean a spark plug, you should use a wire brush or spray-on plug cleaner specifically designed for this ignition part. You can also use a sturdy knife to scrape off tough deposits. Note: NEVER clean a spark plug with a shot blaster or abrasives.

Can I use RC14YC instead of RC12YC?

EITHER RC12YC or RC14YC will work. But for best results use NGK BKR5E or BKR6E. They last longer and are less prone to fouling.

What does a champion RC12YC spark plug fit?

RC12YC Spark Plugs
Center ElectrodeCopper Core
Thread Size14mm
TipProjected Tip
TypeResistor
FitsBRIGGS & STRATTON GAS ENGINES -- Intek, Vanguard single cylinder OHV KOHLER GAS ENGINES -- Command OHV, K series, 16.0/TH16, 18.0/TH18

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.

Are spark plugs Universal for lawn mowers?

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 long does a spark plug last in a lawn mower?

Typically, the consensus among the mechanical engineer community is that a spark plug for a lawn mower will last up to 25 hours of use. Some users simply prefer to replace it every mowing season as a part of their yearly lawn mower maintenance.
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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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