Substitution: 532143978 Learn why
Sold by Sears PartsDirect
Shop Your Way RewardsSM Members earn 172 Points if they purchase this item.Learn More
In stockAdd to Cart 365 day return policy
This is a manufacturer substitution. Part may differ in appearance but is a functional equivalent to prior parts including 121263X.
This manufacturer-approved mower blade (part number 532143978) is for riding lawn mowers, including Craftsman lawn mower model 917254521.
Blade 532143978 rotates under the lawn mower deck to cut the grass.
Disconnect the spark plug wire before starting the repair. Wear work gloves to protect your hands during the repair.