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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Keeping this in view, how do I know what spark plug I need 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.

Subsequently, 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 .

Accordingly, what is a CJ8 spark plug used for?

The Champion CJ8 is a spark plug. It is designed for lawnmowers and outdoor power equipment with small engines. This standard spark plug is made of nickel alloy eletrodes with a copper core. Its shell is plated with corrosion-resistant zinc.

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.

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 often should you change spark plug in lawn mower?

every 25 hours

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

What is the gap on a Champion spark plug?

.030"
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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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