Depends on gearing and weight, but they will run around 3600 rpm, if that helps you.
Depending on the model, 3600 - 4000 rpm top no load speed.
You can get that info on the Briggs and Stratton website. Just go to: http://www.ereplacementparts.com/briggs-and-stratton-parts-c-16758.html?gclid=CPCZj4vGr58CFZdM5Qodp3bDsA and enter your engine model number.
go to briggsandstratton.com
Briggs and Stratton does contract anyone to build mowers. The mower manufacturers contract Briggs and Stratton to build their engines (or whatever engine is on the unit). That is why you can have a Briggs and Stratton on most any type of mower. Same is true for Kohler, Tecumseh, etc. Not to say that the engine manufacturers do not build their own type of outdoor power tool but as the question states "snapper mower". Also keep in mind that if you have a snapper mower with a Briggs and Stratton engine and you need warranty work on the engine you need to go to an Authorized Briggs repair facility where as if you have a mower warranty then you need to go to an authorized repair facility for the mower manufacturer.
Go to managemylife.com and click on manuals.
Go to this link and it outlines all Briggs and Stratton engine types and spares including spark plugs. http://www.manddsmallengine.com/briggs/parts/ Most common plug used in B&S is a RJ19LM
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.
Varies from year to year. As their filters are very expensive I suggest you go to an auto parts store and cross reference it to another quality brand such as Purolator.
If you do that you'll surely blow that engine up, guaranteed! .
62MPH
I cannot find a Purolator or Fram filter that cross references to a Briggs & Stratton 841023. Go to your local auto parts store and ask them to cross reference it for you. Make sure you have the correct B&S filter number.
i believe it is .010 to .015. you can go to B&S site to find out for sure