What should a lawn mower spark plug be gapped at?
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.
Then, do lawn mower spark plugs need to be gapped?
Depending on the type of spark plug needed for your lawnmower engine, the gap between the post and tongue (center and ground electrodes) must be set a specific width. If the gap is too large, the spark generated in the center electrode will not travel completely to the ground electrode.
|Replacement Part Type||Briggs & Stratton Spark Plug Part Number||Spark 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”|
Also know, what is the spark plug for a 6.75 HP Craftsman lawn mower?
Compatible Spark Plug for Craftsman Lawn Mower & Garden Tractor with Tecumseh 6.75 hp OHV - Compatible Champion RJ19LM & NGK BR2LM Spark Plugs.
What happens when the spark plug gap is too small?
The Spark-Plug Gap
If the gap is too small, the spark will likely be too weak and cause the engine to run poorly or with poor efficiency. ... A spark-plug gap gauge both measures and adjusts the gap and is inexpensive and simple to use.
What kind of spark plug do I need for my Craftsman lawn mower?Replacement Plug
The Craftsman 4.5hp mower uses either a Champion model RJ19LM or J19LM spark plug, or equivalent, with the gap set at .
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.