Craftsman 917257660 rocker arm & pivot lawn tractor Parts

Replacing the engine on your Craftsman 917257660 front-engine lawn tractor is worth it when the tractor chassis, mower deck, steering, and transmission are still solid and the total engine swap cost stays well below the cost of replacing the entire tractor. If multiple major systems are worn out, putting money into an engine usually does not pay off.

• The mower deck is not rusted through and still levels correctly.
• The tractor drives and stops normally (brake operation is consistent).
• You are not also facing major deck-drive issues (belt, mandrels, idlers).
• You can do basic mechanical work safely (or you have a shop lined up).
• The engine replacement cost is clearly less than buying a comparable new tractor.

Use your 917257660 owner's manual to review maintenance and safety steps, then check these common “hidden cost” areas:

• Deck drive system: look for belt glazing/cracks and pulley wobble
• Mandrels and venting: grass buildup around mandrels can cause problems; clean debris and open vent holes
• Blades and hardware: bent blades or loose blade bolts can mimic engine power problems
• Fuel system: clogged in-line fuel filter or stale fuel can cause hard starting and surging
• Muffler condition: a corroded muffler is a fire hazard and can affect performance

An engine swap makes sense when it restores a tractor that is otherwise dependable. If the deck, belts, mandrels, or safety-related items also need work, the “engine only” job turns into a full rebuild, and the value drops fast.

Last updated: February 2026

The Craftsman riding mower model 917257660 uses a 15.5 HP, 42-inch tractor engine configuration (as shown in the model’s repair parts section). For the exact engine make and model (such as Briggs & Stratton vs. other suppliers), we use the engine identification details listed in the 917257660 owner's manual.

Use the engine’s ID tag, not the hood decal or mower deck size. On most riding mowers, the engine model and type are stamped on a label or metal tag on the engine shroud.

• Park on a flat surface, set the parking brake, and remove the key
• Let the engine cool completely before touching the muffler or shroud
• Look for an engine label near the blower housing, valve cover, or starter area
• Write down model, type, and code (or serial) from the tag
• Match that information to the engine section in the manual and parts listings

The documentation for model 917257660 is organized around engine maintenance items (oil, air filter, spark plug, cooling fins) and tractor systems (interlocks, wiring diagram, transaxle), which is exactly how you confirm and service the correct engine family.

Craftsman tractors in the 917 model family were built with multiple engine variants over time. Using the engine tag prevents ordering the wrong spark plug, air filter, fuel filter, or carburetor parts.

Last updated: February 2026

For Craftsman model 917257660, the mower deck shown in our parts list is a 42-inch deck, not a 54-inch deck. The deck drive belt used on this 42-inch setup is the lawn tractor blade drive belt 581982501; confirm routing and belt type in the 917257660 owner's manual.

A 54-inch deck belt size is different from a 42-inch deck belt, so matching the deck size to the model is the fastest way to avoid ordering the wrong belt.

• Check the deck shell for a stamped size (often near the discharge chute).
• Measure blade length; 42-inch decks commonly use two blades.
• Compare your deck layout to the deck diagram in the manual.
• If your tractor truly has a 54-inch deck, verify the exact deck model and belt path before buying.

The manual parts list for model 917257660 identifies a V-belt for the 42-inch mower deck. On our parts list for this model, that belt is:

• Lawn tractor blade drive belt 581982501

Deck belts are sized to the pulley spacing and idler geometry. A belt that is even slightly off can slip, jump off, or prevent the PTO from engaging smoothly.

Last updated: February 2026

The model number 917257660 identifies the Craftsman tractor family, but the year is determined from the product ID (model/serial) label on your specific tractor, not from the model number alone. Use the label information and confirm details with the 917257660 owner's manual.

Look for the product ID label (often called the model and serial tag). Common locations include:

• Under the seat or on the seat support
• On the rear fender pan near the seat
• On the frame rail (left or right side)
• Under the hood near the dash tower

Write down everything exactly as shown; it is what we use to match parts and production changes.

• Model number (should match 917257660)
• Serial number
• Any date code or manufacturing code
• Engine model/type/code (if listed)

Craftsman riding mowers often use one of these approaches on the label or engine tag.

The year and serial range help us match the correct electrical and deck components when there are mid-production changes. For example, this model’s parts list includes an ignition key option like the molded ignition key 532140403, and the correct match depends on the exact tractor configuration.

• Match by model plus serial/date code, not model alone
• Compare your deck and drive setup to the diagrams in the 917257660 owner's manual
• If the label is missing, match parts by measurements and mounting style (belt length, blade length, pulley type)

Last updated: February 2026

On the Craftsman lawn tractor model 917257660, the key identifier you will use for service and parts is the model and serial number plate under the seat; record the serial number and your purchase date for future reference using the 917257660 owner's manual.

Check these common spots in this order:

• Under the seat: model and serial number plate (primary ID for the tractor)
• Engine blower housing: engine model number (useful when ordering engine-specific parts)
• Frame area near the seat pan: sometimes the plate is easier to read with the seat tipped forward
• Decals and schematics: helpful for belt routing and operation, but not a date code

Craftsman battery and charger date codes are typically found on the battery housing or the bottom of the charger (often a 6-digit code). That code is separate from the tractor serial number.

Using the correct identifier prevents ordering the wrong parts (for example, a belt, ignition key, or deck component that does not match your exact build). The tractor serial number is the most reliable way to match parts lists and diagrams to your unit.

Last updated: February 2026