The Walbro 188-12-1 (often referred to simply as the 188-12) is a genuine OEM primer bulb designed for small engines. It is a “snap-in” style bulb, meaning it clips directly into the carburetor or a mounting bracket without the need for screws. Key Product Details Purpose: Manually pumps fuel into the carburetor to assist with cold starts. Dimensions: It has an outside diameter (OD) of approximately 19mm (3/4 inch) and a height of 14mm (9/16 inch). Compatibility: Designed for Walbro WA, WT, WY, WYJ, and WYK series carburetors. Equipment Fitment: Found on a massive variety of handheld tools, including: Echo:…