This replacement air purge primer bulb provides reliable engine starting and consistent fuel delivery for small engines. Designed for easy installation and long service life, it restores proper priming function without the need for major repairs. Key benefits Wide compatibility: Fits a broad range of engine models including Tecumseh AV520 AV600 AH600 H30 H50 H35 H60 H70 HM70 HM80 HM100 HMSK80 HMSK85 HMSK90 HMSK100 HMSK105 HMSK110 HS40 HS50 HSK30 HSK35 HSK40 HSK50 HSK60 HSK70 HSK600; Tecumseh LH195SA LH195SP LH318SA LH358SA OH195SA OH195SP OH318SA OH358SA OHSK50 OHSK55 OHSK60 OHSK65 OHSK70 OHSK80 OHSK90 OHSK100 OHSK110 TH139SP TV085XA TVS600; Bolens 31AE160163; MTD 161JW 161JWA 478SU 483SU 490SU 370SUA; YardMachines 31AS295801 31AM2N1B700; LawnBoy 2830; and model 31AR162013 snowblower. Direct replacement options: Replaces part numbers 321802A 570682A 570682 and MTD parts 75110639 75110639A 95110639 95110639A 95110888A 95110888B 75110888 75110888 as well as Stens 056200. Durable construction: Made from durable plastic with good strength and wear resistance for extended use and dependable performance under normal operating conditions. Simple installation: Designed for quick, toollight replacement so you can restore priming function without complex steps. Compact and lightweight: Measures 38 x 43.40 mm (1.50 x 1.71 in) and weighs approximately 12 g (0.42 oz), so it does not add bulk or affect equipment balance. How it solves common problems Restores fuel priming for engines that are hard to start due to a cracked or hardened primer bulb. Prevents air leaks that cause poor starting and inconsistent idling. Offers a directfit alternative to reduce downtime during seasonal maintenance or urgent repairs. Typical use scenarios Winter equipment maintenance: a worn primer bulb on a snowblower before the first heavy snowfall to ensure reliable starting in cold conditions. Lawn and garden equipment : Install this bulb on walkbehind mowers and small engine tools during spring tuneups to restore proper priming. Onthespot field : Keep a spare in a service kit for quick replacement when a primer bulb fails during landscaping or property maintenance. Specifications Material: Plastic Size: 38 x 43.40 mm (1.50 x 1.71 in) Net weight: 12 g (0.42 oz) Package includes: 1 air purge primer bulb Note: Allow for slight manual measurement variation. Verify compatibility with your equipment model and part numbers before .