Depands on the engine. Older ones had it stamped into the blower housing above the spark plug or muffler. Newer ones had a tag rivetted to the top of the housing or stamped into the flange above the muffler.
It is a 2-cycle 4HP Briggs motor.
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.
If you know your part number of even model number, you can go to eReplacementParts.com for the Briggs and Stratton parts your looking for. The site features part lists for each engine or motor and includes thousands of detailed diagrams to help you replace the flywheel once you get it. All in all, they are a very good site for finding tool parts in general but for Briggs and Stratton parts, eReplacementParts is the place to go.
Depending on the model, 3600 - 4000 rpm top no load speed.
yes
48oz
190cc
what plug size fits a 3.75 briggs and stratton,and a 19.5 briggs engine and what is the gap. thank you
SAE30
9
A Briggs and Stratton 17.5 horsepower engine can use any type of small engine motor oil. A heavy duty motor oil is recommended.
For a Briggs and Stratton motor 3.5 motor used straight gas and oil in the crank-case, there is no ratio.