Amazon.com : Briggs & Stratton 498144 Recoil Pulley with Spring for Quantum Engines, 5 HP Horizontal and 6 HP Intek Engines : Lawn Mower Pulleys : Tools & Home Improvement
quantum XM-55 - YouTube
Briggs & Stratton Quantum Spare Parts
Rare 1990 Briggs and Stratton industrial commercial Quantum Power 4.5HP : r/smallengines
IH Book Store!. Covers more than 55 models of Briggs & Stratton single cylinder, L-Head aluminum engines with 2 to 12.5 HP.