Craftsman 917257661 rocker arm & pivot lawn tractor Parts

The Craftsman riding mower model 917257661 is a 15.5 HP front-engine lawn tractor; the engine itself has its own separate model number listed on the engine blower housing. For the exact engine make and model used on your tractor, match that engine model number to the information in the owner's manual.

Where to find the engine model number (fast)

We use the engine model number (not the tractor model number) to identify the exact engine family and service parts.

• Lift the seat and confirm the tractor model plate shows 917257661.
• Open the hood and locate the blower housing on the engine.
• Find the engine ID tag or stamping (often near the starter, valve cover, or shroud).
• Write down the full engine model and type numbers exactly as shown.
• Use that engine number when looking up tune-up parts (spark plug, air filter, fuel filter) and engine-specific diagrams.

Tractor model vs. engine model (what’s different)

Item you’re identifying	Where it’s found	What it’s used for
Tractor model 917257661	Model plate under the seat	Mower deck, belts, steering, chassis, electrical, lift system
Engine model number	Blower housing on the engine	Engine parts, carburetor, ignition, internal engine service

Why it matters

Two tractors with the same deck size can use different engines across production runs. Using the engine model number prevents ordering the wrong ignition parts or maintenance items and keeps troubleshooting accurate.

Parts that commonly relate to engine performance on this tractor

If the tractor cranks but will not move or the deck will not engage, the issue is often belt or drive related rather than the engine itself.

• Ground drive issues: inspect the lawn tractor ground drive belt, 1/2 x 82-in 532140294
• Blade engagement issues: inspect the lawn tractor drive belt 532144200
• No-crank or click-no-start symptoms: test the solenoid 532146154

You can also search and order additional replacement parts by model number on Sears PartsDirect.

Last updated: February 2026

For a Craftsman riding lawn tractor like model 917257661, a typical engine replacement (engine plus labor) usually runs about $260 to $1,800, depending on engine type, shop labor rates, and any extra parts needed during the swap. Plan on around 6 hours of labor for a riding mower engine change.

What drives the total cost

• Engine price: the biggest variable (new, rebuilt, or used)
• Labor time: riding mower engine swaps commonly take longer than walk-behind mowers
• Extra parts often replaced at the same time: belts, pulleys, fuel line, battery cables
• Condition of fasteners and mounts: rusted hardware increases labor
• Tune-up items: oil, filter, spark plug, and fresh fuel after installation

Quick cost breakdown (typical ranges)

Cost item	Typical range	Notes
Engine (part only)	$200 to $1,500+	Varies by horsepower, shaft size, and brand compatibility
Labor	$200 to $600+	Often based on ~6 hours shop time
Fluids and tune-up items	$20 to $80	Oil, filter, spark plug
“While you’re in there” parts	$0 to $200+	Belts, pulleys, wiring repairs

What to check before you buy an engine

Because each tractor and each engine have their own model numbers, we recommend confirming the engine model number on the blower housing and matching key specs before ordering.

• Engine model number (from the engine, not the tractor)
• Crankshaft diameter, length, and keyway style
• Electrical connections (charging system, starter, safety interlocks)
• Throttle and choke linkage style
• Muffler and exhaust routing clearance

For model-specific service notes and where to find ID plates, use the owner's manual.

Why it matters

An engine that is even slightly mismatched (shaft size, wiring, or mounting) can turn a straightforward replacement into repeat belt failures, charging problems, or unsafe operation. Verifying specs up front protects your time and your mower.

Parts you may end up replacing during an engine swap

If the old engine failed due to heat, vibration, or belt damage, these common wear items are worth inspecting:

• Lawn tractor ground drive belt, 1/2 x 82-in 532140294
• Lawn tractor drive belt 532144200
• Solenoid 532146154

You can order replacement parts for your Craftsman 917257661 from the parts list for this model, or search by model number on Sears PartsDirect.

Last updated: February 2026

For the Craftsman 42-inch riding mower shown on this page, the model number is 917.257661 (often written without the dot as 917257661). You can confirm it in the tractor’s parts list and decals section of the owner's manual.

Where to find the model number on the mower

We see the model number most often on the product identification label. Check these common locations:

• Under the seat (seat pan area)
• On the rear fender or fender pan
• Near the frame rail by the engine
• Under the hood near the dash tower
• On the mower deck shell (sometimes a separate deck tag)

917.257661 vs. 917257661: what’s the difference?

They refer to the same Craftsman tractor model; the dot is just a formatting style used in some manuals and parts diagrams.

You might see it written as	Meaning	Use it for
917.257661	Same model number with a dot	Manuals, diagrams, decals lists
917257661	Same model number without a dot	Parts lookup and ordering

Why it matters

Using the exact model number ensures you get the right parts for your 42-inch deck setup, such as the correct blade drive belt, mandrel components, and deck hardware. For example, the parts list for this model includes items like the husqvarna lawn tractor mulching blade, 21-in 532134149 and the lawn tractor drive belt 532144200.

Last updated: February 2026

Craftsman model 917257661 was produced across a multi-year run; the exact build year is identified by the serial number plate under the seat. We use that serial information (along with the manual’s model/serial location details) to match the correct parts and specifications for your specific tractor.

Where to find the build date information

The owner documentation for model 917257661 states the model and serial numbers are on a plate under the seat. Use the serial number from that plate as your best indicator for the tractor’s production timeframe; see the owner's manual.

• Lift the seat and locate the ID plate or sticker
• Write down the full MODEL NUMBER: 917257661 and the SERIAL NUMBER
• Record the date of purchase if you still have it (helpful for narrowing the timeframe)
• Use the serial number when looking up parts diagrams and electrical/steering components
• Keep the information in a safe place for future reference

What we can confirm from the manual (model-specific)

From the documentation excerpts for this tractor, we can confirm it is a 15.5 HP, 42-inch tractor and that the manual is specifically labeled for MODEL NUMBER 917.257661 (same model family as 917257661). That confirms you are in the right manual and parts family, even before decoding the serial number.

Item	What to check	Why it helps
Model number	917257661 (under seat)	Confirms the correct parts list and diagrams
Serial number	Under seat plate	Pins down the specific production run
Date of purchase	Your records	Helps estimate the build year if the serial is hard to decode

Why it matters

Craftsman 917-series tractors often have running changes by production run (wiring, steering parts, belts, and deck components). Using the serial number prevents ordering the wrong ignition key, belt, or steering part for your exact configuration.

Ordering parts once you have the serial number

After you confirm the model and serial, you can confidently order common wear items for this tractor, such as the molded ignition key 532140403 or belts listed for the model, and you can also search by model number on Sears PartsDirect.

Last updated: February 2026