Plugs gap at 0.030" as a rule
The proper spark plug for 4hp Briggs & Stratton is a J8 which I use in all my motors.
what plug size fits a 3.75 briggs and stratton,and a 19.5 briggs engine and what is the gap. thank you
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
Champion RJ19LM
rc12pyp3 or rc12yc non platnum plug
RC12YC in Champion
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.
.030
.030
Rc12yc