Craftsman 91725721 st 10 garden tractor Parts

For this Sears PartsDirect page, the Craftsman 42-inch riding mower model number is 91725721. That model number identifies the exact front-engine lawn tractor version so you can match the correct parts, such as the starter solenoid and drive idler pulley.

We recommend checking the mower’s model tag so the number on the machine matches the number you use for parts lookup.

• Look under the seat on the seat pan or frame
• Check the rear fender area near the seat
• Look on the frame rail near the engine compartment
• Wipe dirt and grass off the tag so all digits are readable

Craftsman 42-inch riders can share the same deck size but use different electrical and drive components. Using 91725721 helps ensure the part fits your exact tractor.

Use the model number first, then confirm the part ID on the parts list.

• Match the full model number: 91725721
• Compare the part ID (for example, 532146154) to your old part when possible
• Replace worn fasteners and hardware during reassembly (nuts, bolts, washers)
• Order directly from the parts list for this model, or search by model number on Sears PartsDirect

A correct model number prevents wrong-part returns and saves repair time, especially on common mower issues like no-start conditions, drive problems, and wheel or axle wear.

Last updated: February 2026

On many Craftsman riding mowers and tractors, the build date is encoded in the serial number as a 6-digit date code: MMDDYY (month, day, year). For example, a code like 072811 reads as July 28, 2011; confirm the exact format by matching the serial tag on your Craftsman model 91725721.

Look for the product identification label on the tractor frame (commonly under the seat, near the rear fender, or on the frame rail). Once you find the serial number, check for a 6-digit block that looks like a date.

• Write down the full model number (91725721) and the full serial number
• Look for a 6-digit sequence that fits MMDDYY
• Convert the first two digits to a month (01 to 12)
• Convert the next two digits to a day (01 to 31)
• Convert the last two digits to a year (00 to 99)

Some Craftsman serial tags use a different layout (letters mixed with numbers, or the date code appears in a different position). When that happens, we use the model number 91725721 plus the full serial number to match the correct parts diagrams and ensure you get the right replacement parts.

• Use the model number to pull the correct parts list first
• Compare your tractor’s configuration (deck size, engine family, transmission type)
• Match wear parts by diagram location and description
• Order common service items as needed (for example, steering and axle hardware)

Knowing the build year helps us match the correct Craftsman parts breakdown for running changes across production, especially for steering, front axle, and electrical starting components.

If you’re replacing a starting component while you’re identifying the tractor, the solenoid 532146154 is one of the model-matched parts we list for Craftsman 91725721.

You can order replacement parts from the parts list for your model, or search by model number on Sears PartsDirect.

Last updated: February 2026

A Craftsman front-engine lawn tractor like model 91725721 typically lasts 10 to 15 years with normal residential use and consistent maintenance (oil changes, blade care, belt checks, and proper storage). Heavy towing, steep terrain, and missed maintenance shorten that lifespan.

• Engine maintenance: regular oil and air-filter service prevents premature wear.
• Drive and deck wear items: belts, idlers, and bearings wear faster in dusty or tall grass.
• Storage: keeping the tractor dry and clean reduces rust and electrical issues.
• Operating habits: avoiding impacts, overloading, and mowing at the right height reduces strain.
• Parts replacement timing: replacing worn parts early prevents secondary damage.

These parts are often replaced during a tractor’s life; using the correct fit for model 91725721 helps reliability.

A realistic lifespan helps you decide whether to invest in maintenance and key repairs (like a solenoid or idler) versus planning for replacement. On riding mowers and tractors, small wear parts often restore dependable starting and cutting for years.

Last updated: March 2026