THIS IS A REPLACEMENT WORM GEAR. (20 TEETH) IT REPLACES PART NUMBERS 917-04861, 917-0528, 917-0528A, 717-0528, 618-0528, 918-0528, 717-04449, 717-0528, 717-04861 AND 917-05861. OD: 1 7/8" X ID: 3/4" W: 5/8", 20 TEETH.Warning:Lead-Nickel-Cancer and Reproductive Harm

REPLACEMENT SNOW BLOWER STARTER DRIVE GEAR PINION. IT REPLACES PART NUMBERS 28-9110, 150-451, AND 13037. THIS YELLOW PLASTIC GEAR HAS 16 TEETH. FOR WHEEL HORSE S200 AND S620 SNOW BLOWERS, 38020, 38030, 38120, AND 38130.Warning:Lead-Nickel-Cancer and Reproductive Harm