What should the spark plug gap be on a Briggs and Stratton?
Flathead Engine Spark Plugs & Gaps
| 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” |
Thereof, what's 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” |
Also to know is, do lawn mower spark plugs come pre gapped? Check the gap on the new spark plug before installing it. A new plug will often come pre-gapped to match your specific engine, but use a spark plug gauge to verify that it matches the manufacturer's specifications.
Besides, what happens when the spark plug gap is too big?
One of the key factors that makes a spark plug work well, or not, is the size of the gap between the electrodes. ... However, if the spark plug gap is too large, the spark is unlikely to consistently "jump" across the long distance between electrodes, thus leading to a rough-running engine or one that doesn't run at all.
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.
