Rotary Corp brand aftermarket product. Also replaces Briggs & Stratton 391780, 394665, & 394959. Fits models 220000, 251000, 252000, 253000 series. 10 & 11 hp Horizontal and 11 hp Vertical.For our 23-6725 piston assy. Cylinder diameter 3.4375".
Also replaces Briggs & Stratton 391780, 394665, & 394959. Fits models 220000, 251000, 252000, 253000 series. 10 & 11 hp Horizontal and 11 hp Vertical.For our 23-6725 piston assy. Cylinder diameter 3.4375". BRIGGS & STRATTON 391780 BRIGGS & STRATTON 499996 OREGON 36-005 PRIME LINE 7-03525 Fits 500-074 SUNBELT B1SB1466