What is the spark plug gap on a Craftsman lawn mower?
Flathead Engine Spark Plugs & Gaps
Replacement Part Type | Replacement Spark Plug Options by Briggs & Stratton Part Number | Spark Plug Gap |
---|---|---|
"Surefire" RJ2YXLE in Craftsman Smooth Start (MRS) lawn mower | 591040 | .030” |
Subsequently, what is the proper spark plug gap?
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.
The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .
Beside above, what's the gap on a spark plug for a lawn mower?
Setting the Gap on Your Spark Plug
You'll need a spark plug gauge to adjust the gap on your lawn mower's spark plug. Although many small engine spark plugs require a .030 gap, this varies depending on the engine type. You can check this on the engine owners manual.
What happens if the spark plug gap is wrong?
If the spark plug gap is incorrectly set, it can lead to engine issues. The customer may experience loss of power, misfires, spark plug fouling, increased plug wear, or poor gas mileage.