The Briggs & Stratton engine model 21M314-2470-E2 is a 342cc Snow Professional Series horizontal shaft engine designed specifically for snowblowers Number ingrave in the Standard size piston = H079A 5 216413 Or B&S 793318 or 791813 B&S oversize piston .020 inch Number 793325 but NLA And No information on a .010 inch oversize piston ( option )
In my rambling through cyberspace I stumbled across the solution in a YouTube video, "Briggs and Stratton 300e won't prime, runs with starter fluid - Easy fix." I had been pushing the primer bulb 5-7 times but it seems that for this engine you need to push the bulb 10-12 times very rapidly. I did that and it cranked right up!
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Rental Equipment Register: Briggs & Stratton, Pratt Miller Team Up to Push System-Level Electrification in Heavy-Duty Equipment
Briggs & Stratton, Pratt Miller Team Up to Push System-Level Electrification in Heavy-Duty Equipment
MSN: Who Owns Briggs & Stratton And Where Are The Engines Made?
When Stephen F. Briggs and Harold Stratton founded their company in Milwaukee in 1908, they couldn't have imagined how far their small engines would travel. What began as a modest venture making auto ...
Especially important on the Briggs single 21,28,31, and 33 series Intek engines as they are bad about blowing the head gasket between the cylinder and push rod galley. Air does leak pass the ring end gaps so even the positioning of rings can affect the leakage rate.