HOOAI New 570682 570682A Primer Bulb for Tecumseh Snow King HMSK100 HMSK105 HMSK110 AV520 Snow Blower (1PC) Direct Replacement! Bolt-on & Go parts! 3 Months warranty from our store! We are professional auto parts manufacturer and seller! Please compare your old part with the pictures if you are not sure if it will fit.