What should a lawn mower spark plug gap be?
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.
Keeping this in view, how do you gap a lawn mower spark plug?
Hereof, what is the spark plug gap on a Briggs & Stratton?
Flathead Engine Spark Plugs & Gaps
|Replacement Part Type
|Briggs & Stratton Spark Plug Part Number
|Spark Plug Gap
|Electromagnetic Suppression (EMS) (Replaces Champion QC12YC)
|Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC)
|696202 5066 (5066D, 5066H)
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.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.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.Replacement Plug
The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .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.