homepostsWhat should a lawn mower spark plug be gapped at?

What should a lawn mower spark plug be gapped at?

Dennis WaldenNov 21, 2021

Flathead Engine Spark Plugs & Gaps

Replacement Part TypeReplacement Spark Plug Options by Briggs & Stratton Part NumberSpark Plug Gap
"Surefire" RJ2YXLE in Craftsman Smooth Start (MRS) lawn mower591040.030”

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Keeping this in view, what is the spark plug gap on a Briggs & Stratton?

Flathead Engine Spark Plugs & Gaps

Replacement Part TypeBriggs & Stratton Spark Plug Part NumberSpark Plug Gap
Electromagnetic Suppression (EMS) (Replaces Champion QC12YC)691043 792015.030”
Extended Life Series® OHV Spark Plug Platinum (Replaces Champion RC12YC)696202 5066 (5066D, 5066H).030”
One may also ask, can you gap spark plug without tool? The good news is that it's not just cheap to buy, but also extremely easy to use too. Using the gapper is simple. All you need to do is slide the spark plug electrode opening into the gap opener and gently move it over to the smallest side of the gapper.

In respect to this, 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

  1. You can't get the engine to fire up at all.
  2. You have to tug extra hard for longer than usual on the rewind.
  3. Your lawn mower loses power while moving.
  4. The gas runs out quicker than it used to.
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About The Author

Dennis Walden

Dennis owns a small farm and loves to grill since his early childhood. He’s a professional cook, but hiking and enjoying the great outdoors is his no less favorite part of life.

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