Briggs And Stratton Quantum Parts - sears "briggs and stratton quantum parts" & marketplace (500+) Only. In-store: set your location. sort by Stens Carburetor Repair Kit Briggs & Stratton Quantum and 5 HP Industrial Plus Engines. Sold by weingartzsupplyco an eBay Marketplace seller. add to compare compare now. $27. Briggs & Stratton Quantum Spare Parts The Briggs & Stratton Quantum also known as 45,50,55,60,625,650,675 vertical crankshaft side valve engines (L- head type). This type of engine is normally fitted to walk behind equipment. These engines have a paper air cleaner, a plastic tank and a metal float type carburettor.