The Tecumseh 570704 Primer Bulb is a genuine OEM replacement part designed for various Tecumseh small engines. This essential component facilitates cold starting by delivering a small amount of fuel to the carburetor. It replaces part number 570704A and features an outer diameter of approximately 31.75 mm (1.25 inches) and an inner diameter of approximately 22.225 mm (0.875 inches). Weighing approximately 0.023 kg, this primer bulb ensures proper fuel delivery for consistent engine performance in compatible Tecumseh models.