I have a push mower with a 4.5 horse on it and it uses a champion j19lm.
The proper spark plug for 4hp Briggs & Stratton is a J8 which I use in all my motors.
what is the champion cross reference for a briggs and stratton spark plug 691043
0.030 is the gap for briggs and stratton 4.5 hp mower
.030
official site for Briggs and Stratton Spark Plugs is: http://www.briggsandstratton.com/maint_repair/routine_maintenance/choosing_spark_plugs/ The proper spark plug will depend on the type of 6.5 HP motor that you have. Briggs and Stratton made several different ones and the best way to get the proper plug will be to call an authorized Briggs and Stratton repair shop with the mower make and model numbers.
what plug size fits a 3.75 briggs and stratton,and a 19.5 briggs engine and what is the gap. thank you
Rc12yc
.030
Champion RJ19LM
Champion rj19lm
Champion Spark Plug QC12YC
The spark plug gap for a Briggs and Stratton 13 horsepower engine should be .030 inches. A spark plug for this engine may be purchased at an auto parts store.