What thread is a 14mm spark plug?

Identifying NGK Spark Plugs

What do spark plug part numbers mean?

The heat rating is a measure of the amount of heat dissipation. The heat range of a spark plug is the range in which the plug works well thermally. The heat rating of each NGK spark plug is indicated by a number; lower numbers indicate a hotter type, higher numbers indicate a colder type.

How do I know my spark plug size?

The first letter of the ND spark plug code (in this case an “X”) indicates the thread size of the spark plug. There are three size spark plug threads currently being used in motorcycles and ATVs. “W” indicates a 14 mm x 1.25 pitch size, “X” indicates a 12 mm x 1.25 size and “U” indicates a 10 mm x 1.0 size.

What size is a 2 stroke spark plug?

Specifications: Thread:14mm. Reach: 12.7mm (1/2″) Hex Size: 13/16″ (20.6mm)

Does M14 mean 14mm?

M14 and 14mm are the same thing. M14 means that the kit is 14mm.

What does MP mean on a spark plug?

SparkPlugs.com: Manufacturer’s Numbering Systems.

How do you decode a spark plug?

“A” indicates a 12 mm x 1.25 with a 3/4″ reach. “Z” indicates a 10 mm x 1.0 with a 1/2″ reach. “G” indicates a 10 mm x 1.0 with a 3/4″ reach. The number (82 in this case) indicates the heat range of the spark plug, the higher the number the hotter the heat range (opposite of NGK and ND spark plugs).

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).

What happens if you use the wrong size spark plug?

If the electrode protrudes too far, it can strike the piston. If it’s too short, it can cause misfires. If the thread doesn’t match perfectly, it can damage the threads in the cylinder head, become cross-threaded or seized. If the plug is overtightened, it can strip out the cylinder head threads.

Is there a difference between 2 stroke and 4 stroke spark plugs?

The first difference is the fact that the spark plugs fire once every revolution in a two-stroke engine, while firing is once every other revolution in a four-stroke engine. A four-stroke engine has a separate compartment for the oil and doesn’t require mixing.

Are all 2 stroke spark plugs the same?

There will be differences depending on the engine type and size (insulator length, resistor or not, temperature range, electrode type) and one type will suit a 2 stroke better than a 4 stroke (for a few reasons) but assuming all the above parameters are close to the same there should be little discernable difference in …