To keep the mower running smoothly, replace the spark plug once a year, or as often as your owner's manual specifies. Replace the spark plug with a manufacturer-approved riding lawn mower part if it's fouled or the ceramic insulator is cracked.
In this regard, how do you change a spark plug on a riding lawn mower?
Also, where is the spark plug on a 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.
Consequently, how do you check a spark plug on a riding lawn mower?
Rewind the rope around the flywheel and turn the lawn mower's ignition switch on. Pull the rope to spin the flywheel and watch for a spark on the original spark plug. If a spark is present, the spark plug is working properly. An absence of spark will require replacement of the spark plug.
For most racing applications, you usually want the plug gap to be between 0.020 and 0.040 of an inch. Most engine builders seem to settle around 0.035 of an inch. Factors such as the type of ignition you run, cylinder heads, fuel and even timing can affect how much gap will work best for you.
Lawn mower plugs may have a shorter thread length than auto plugs. The threads on many automobile plugs are 1/2 inch or 3/4 inch long. Many lawn mower engines use a plug with threads only 3/8 inch long. ... Most mower plugs use a metal gasket washer as a cylinder seal, as do many auto plugs.
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.
However, you can not spray the carburetor when the engine is off since it cannot do the cleaning without being propelled. All you need to do is to start the engine and spray directly at the center of the carburetor while it is running. Any deposits clogging in the carburetor will easily be removed.
Carbon collects on the plug electrodes because of incomplete combustion. ... If the carburetor sprays too much fuel into the combustion chamber, the fuel burns cooler. The smoke that results fouls the plug as well as the air filter and the spark arrestor that covers the engine's exhaust port.Share to:FacebookTwitterPinterestEmail