Champion RJ19LM
On a valve-in-block 8HP with an RJ19LM or equivalent plug, it is 0.030"
The proper spark plug for 4hp Briggs & Stratton is a J8 which I use in all my motors.
694385 is a platinum plug also sold as Briggs 5066 and 5066H. Non-platinum Champion equivalent is RC12YC.
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
The spark plug for the Briggs and Stratton 17.5 hp motor model 311777 is typically the Champion RJ19LM or an equivalent plug. It's important to ensure that the spark plug is correctly gapped to the manufacturer's specifications for optimal performance. Always refer to the engine's manual or the Briggs and Stratton website for the most accurate and updated part information.
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.
RC12YC in Champion
rc12pyp3 or rc12yc non platnum plug
.030