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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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Regarding this, 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.

Beside this, 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.

In respect to this, do all lawn mowers use the same spark plug?

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.

How often should you replace a lawn mower spark plug?

How often should you change spark plugs in a lawn mower? Lawn mower spark plugs should be changed according to your lawn mower owners manual, or annually if your manual does not specify. Another good option is to change the spark plugs once the winter season starts so it will be ready to go when Spring arrives.

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 size spark plug does a Briggs and Stratton?

NGK Spark Plugs for Briggs & Stratton Engines

Gap	0.028" (0.7mm)
Terminal	Removable Nut
Thread Size	14mm
Type	Non-Resistor, Standard
Fits	BRIGGS & STRATTON GAS ENGINES -- All models except twin cylinder, Vanguard Intek, 19A400-19G400 series

What spark plug does a craftsman LT1000 take?

Lumix GC NGK Spark Plug For John Deere LA135 Craftsman LT1000 YT4000 YTS3000 Tractors.

What type of spark plug does a Briggs and Stratton?

Flathead Engine Spark Plugs & Gaps

Replacement Part Type	Briggs & Stratton Spark Plug Part Number	Spark 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”
Resistor	692051	.020”

How long does a lawn mower spark plug last?

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.

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 is a lawn mower spark plug?

Spark plug sockets come in two sizes: 5/8 inches and 13/16 inches. Most spark plug sockets have a rubber insert that holds the plug snugly in place. You may also need a universal joint if your spark plugs are difficult to reach.

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