Spark plug & gap in between engines
Spark plug & gap in between engines:
A properly gapped spark plug is necessary for a properly functioning engine. The gap size affects the spark plug’s firing temperature, which has a direct relationship to the combustion of fuel and air in the engine. Opening the gaps provides a larger spark, useful for some customized engines in maximizing the efficiency. You can learn to properly gap spark plugs by measuring and adjusting accordingly.
Where is the spark plug located on small engines?
Observe step-by-step image guide to locate spark plugs in different Briggs & Stratton engine types. A spark plug wrench can help avoid engine damage when removing these parts for cleaning or replacement.
Now that you’ve found the part you’d like to replace, you can use the chart below to identify the genuine Briggs & Stratton replacement spark plug and gap recommendation. Be sure to use the right spark plug! Although several different spark plugs may screw into the engine, using the incorrect one will result in performance problems and possible internal engine damage.
Flathead Engine Spark Plugs & Gaps
Also known as L head or Side Valve Engines, these engines are commonly used for walk behind lawn mowers and pressure washers.
|Replacement Part Type||Replacement Spark Plug Options by
Briggs & Stratton Part Number
|Spark Plug Gap|
|Electromagnetic Suppression (EMS)||697451||.030”|
|Extended Life Series® L-Head Spark
5062 (5062D, 5062H)
|Champion CJ8, RCJ8, RJ19HX, J19LM, and RJ19LM||796560
5062 (5062D, 5062H)
|Champion RJ19LMC used in
|591868||.020” Engines built after Code Date 110630x
.030” – built before Code Date 110701xx*
|Champion RJ2YLE used in Quantum Series 625, 675, & 725 engines built after Date Code 110701xx||799876
*Not for Quantum engines built before Date Code 110701xx or other L Head engines
|“Surefire” RJ2YXLE in Craftsman Smooth Start (MRS) lawn mower||591040||.030”|
If you have a Quantum engine, be sure to check the Code Date before doing any engine maintenance.
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