Briggs 1-3/4" Gas Cap. Designed for Briggs MAX & Quantum Engines with a diameter of 1-3/4" and 4 - 5.5 HP. This vented high dome gas cap comes with a liner and fits Briggs & Stratton 3.5 to 6 hp Quantum series engines, Max series engines, and Europa series engines. It replaces Briggs & Stratton No 397974.

• 1-3/4 Inch Gas Cap
• For Briggs MAX & Quantum Engine, 1-3/4" Diameter, 4 - 5.5 HP
• Suitable for Briggs & Stratton 3.5 to 6 hp Quantum engines