Briggs & Stratton part 494408 is a genuine OEM carburetor primer bulb used on a massive variety of small walk-behind lawn mower engines. It is a critical part of the fuel system that manually pushes fuel into the carburetor for easier cold starts. Product Overview Part Type: Carburetor Primer Bulb Function: Forces fuel into the intake to assist in starting. Replacement Info: This part has been officially superseded to part number 694394. If you order 494408, you will often receive 694394, which is the current factory replacement. Key Identification: This is a “vented” style bulb (typically featuring a small hole…