Amazon.com : Stens New Fuel Cap 125-070 Compatible with/Replacement for Briggs & Stratton for 3.5 Thru 6 HP Vertical Max, Quantum and Europa Engines LG397974, LG397974S, M143291, MIU11172, PT11028, PT12572, 33385 :
Amazon.com : Lawnmowers Parts & Accessories Maintenance Tune-Up Kit For Briggs & Stratton 5106A, 5106B: Quantum 3.5-6.5 HP : Patio, Lawn & Garden
Briggs & Stratton 992244 Engine Care Kit for 625/650/675 Quantum Series, Black : Amazon.co.uk: Garden
Briggs & Stratton 498144 Recoil Pulley with Spring for Quantum Engines, 5 HP Horizontal and 6 HP Intek Engines