What size spark plug goes in a riding lawn mower?
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, 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
- You can't get the engine to fire up at all.
- You have to tug extra hard for longer than usual on the rewind.
- Your lawn mower loses power while moving.
- The gas runs out quicker than it used to.
Furthermore, 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.
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.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.
|Center Electrode||Copper Core|
|Fits||BRIGGS & STRATTON GAS ENGINES -- Intek, Vanguard single cylinder OHV KOHLER GAS ENGINES -- Command OHV, K series, 16.0/TH16, 18.0/TH18|
- Change spark plugs at the beginning of every mowing season (in the spring) and/or every 100 hours of use.
- Use the same spark plugs recommended by the manufacturer of your lawn tractor or push mower.
The engine misfires or runs rough. The engine starts, but stalls shortly after. There is a noticeable increase in fuel consumption during normal equipment use.