Craftsman 917276621 tractor Parts

For a Craftsman riding tractor like model 917276621, a full engine replacement (engine plus labor) typically runs about $260 to $1,800, with around 6 hours of labor in many shops. Exact cost depends on the engine type, parts needed, and local labor rates; see the 917276621 owner's manual for maintenance steps that can help you avoid premature engine damage.

What drives the total engine replacement cost?

• Engine price (new, remanufactured, or used)
• Labor time and shop rate (riding tractors take longer than walk-behinds)
• Extra parts often replaced at the same time (belts, pulleys, wiring, battery cables)
• Root cause (overheating, oil starvation, fuel contamination) that must be corrected
• Pickup/delivery fees if you do not transport the tractor

Typical cost ranges (what you usually pay)

Cost item	Typical range	Notes
Engine (part only)	$200 to $1,400	Varies by horsepower and crankshaft specs
Labor	$200 to $700	Often 5 to 7 hours total
Misc. parts/fluids	$20 to $200	Oil, filter, fuel filter, clamps, hardware
Total installed	$260 to $1,800	Most common all-in range

Before you replace the engine: quick checks that save money

We recommend ruling out common “no start” and “loss of power” causes first, because they can look like a bad engine.

• Verify battery and cable connections are clean and tight
• Check the starter solenoid and starter circuit (a click with no crank is common)
• Replace the fuel filter if fuel flow is restricted
• Check engine oil level and change oil on schedule
• Clean the air filter and cooling fins/shrouds to prevent overheating

If you are chasing a click/no-crank symptom, use riding lawn mower engine clicks but doesnt turn over video as a step-by-step diagnostic.

Why it matters

The manual warns that running with a blocked grass screen, dirty cooling fins, or missing cooling shrouds can overheat the engine and cause damage. Staying on the maintenance schedule (oil, air filter, cooling system cleaning) is the best way to avoid the high cost of an engine swap.

Last updated: February 2026

Yes, it’s worth replacing the engine on your Craftsman 917276621 front-engine lawn tractor when the tractor’s deck, chassis, and drive system are still solid and the total engine job costs less than about half the price of a comparable replacement tractor. If multiple major systems are worn out, replacement is the better value.

Quick decision checklist

• The mower deck cuts evenly and the spindles are not noisy or loose
• The transmission drives smoothly (no slipping or loss of power)
• The frame and steering are tight (no cracks, severe rust, or excessive play)
• You can do the labor yourself or you have a shop you trust
• The engine failure is isolated (not a symptom of widespread neglect)

For model-specific maintenance intervals and operating guidance that protect your investment, use the 917276621 owner's manual.

Cost and effort: what to compare

Use this simple comparison to decide before you spend money on an engine.

Option	Best when	Typical downside
Replace engine	Tractor is in good overall condition	Highest parts cost, moderate labor
Repair engine (partial)	Problem is limited (starter, solenoid, fuel, ignition)	Can turn into repeated repairs
Replace tractor	Deck, transmission, steering, and wiring are also worn	Higher upfront cost

Check these common “not an engine” problems first

Many no-start or no-crank complaints trace back to basic electrical or fuel issues. The troubleshooting chart in the manual points to items like battery condition, wiring, ignition switch, and the starting circuit.

• Battery charge and cable/terminal condition
• Fuse and wiring connections
• Ignition switch and safety interlock operation (brake and attachment clutch)
• Starter solenoid function (a common click-no-crank cause)
• Fuel quality and fuel filter condition

If you’re chasing a click-no-start symptom, follow the steps in riding lawn mower engine clicks but doesnt turn over video.

Why it matters

An engine swap only pays off when the rest of the Craftsman 917276621 is dependable. If the deck needs major spindle work, for example, you may want to price that repair alongside the engine. A worn spindle/mandrel can also affect cut quality and vibration, so factor in deck condition when you decide.

If you’re already seeing deck vibration or uneven cutting, inspect the lawn tractor mandrel shaft assembly 587819701 as part of your overall cost estimate.

Last updated: February 2026

Craftsman lawn tractor model 917276621 is a 21.0 HP tractor with a 42-inch mower deck, electric start, and automatic transmission. To identify the exact engine make and model installed on your unit, match the numbers on the engine’s ID label to the information in the 917276621 owner's manual.

How to identify the exact engine on your 917276621

The engine identification label is attached to the engine itself (not the tractor frame). Look for a sticker or stamped plate on the engine shroud/blower housing or on the engine block near the valve cover area.

Write down these fields exactly as shown:

• Engine brand (commonly Briggs & Stratton, Kohler, or similar)
• Engine model number
• Type/spec number
• Code or serial/date number
• Any additional spec information on the tag

What the manual confirms for this model

The operator manual for the 917.276620/917.276621 tractor family confirms these core specs.

Spec item	917276621 configuration
Power rating	21.0 HP
Mower deck	42-inch
Starting	Electric start
Transmission	Automatic

Why it matters

The exact engine model determines the correct tune-up parts (spark plug, air filter, fuel filter, and oil filter if equipped) and the right service steps for problems like hard starting, surging, or backfiring.

Helpful related part if it will not crank

If you turn the key and only hear a click, the starting circuit is a common place to begin checks; the lawn tractor starter solenoid 582042802 is one of the service parts used on this tractor.

• Confirm the battery is fully charged and terminals are clean and tight
• Fully depress the clutch/brake pedal before turning the key
• Disengage the blade/PTO control before starting
• Make sure you are seated so the operator-presence switch is engaged
• Follow the maintenance schedule for oil level, air filter cleaning, and fuel filter replacement

Last updated: February 2026

On this Craftsman parts page, the model number is 917276621; it is a front-engine lawn tractor (21.0 HP, 42-inch mower), not a 6.75 HP walk-behind mower. If your machine is labeled “6.75,” use the mower’s model tag to identify its exact model number.

What “6.75” means vs. what you need for parts

“6.75” is an engine power label used on many different Craftsman walk-behind mowers; it is not a unique model identifier. For ordering blades, belts, and other parts, the mower’s full model number is what matters.

• “6.75” usually appears on the engine shroud or recoil cover
• The mower model number is typically a 9-digit Craftsman number (often starts with 917)
• The engine itself also has a separate engine model/type code
• Parts lookup uses the mower model number first, then deck size and configuration
• The serial number helps with service history, not selecting most parts

Where to find the model number on a Craftsman walk-behind mower

Check common tag locations on walk-behind mowers:

• Rear of the deck near the discharge opening
• Top of the deck near the engine mounting area
• On the handle bracket or height-adjuster area
• On a sticker near the rear wheels

For the tractor shown here, the identification format and locations are covered in the 917276621 owner's manual.

Quick ID guide

You see on the machine	What it identifies	Best use
“6.75”	Engine power label	Not enough for parts
9-digit number like 917XXXXXX	Craftsman mower model number	Use for parts lookup
Engine model/type code	Engine family	Use for tune-up parts

Why it matters

Blades, drive belts, and deck hardware vary by deck design and chassis. Using the correct model number prevents ordering the wrong cutting blade, belt, or pulleys.

Last updated: February 2026

Craftsman model 917276621 was sold across multiple production runs, so the exact year is identified by the date-of-manufacture code on the tractor’s ID tag, not by the model number alone. Use the Craftsman 917276621 owner's manual to locate the model and serial label, then match the serial/date code to the build year.

How to find the build year on your tractor

On most Craftsman front-engine lawn tractors, the model and serial information is printed on a label under the seat, on the rear fender pan, or near the frame rail.

• Park on a flat surface, set the parking brake, and remove the key
• Lift the seat and look for the model/serial label (often under the seat pan)
• Write down the serial number and any date code shown
• If the label is dirty, wipe it gently so every digit is readable
• Use the serial/date code to determine the manufacturing year

What you can confirm from the manual

The operator’s manual for this platform lists the tractor as a 21.0 HP, 42-inch mower, electric start, automatic transmission and shows the model family as 917.276620 / 917.276621. That confirms the configuration, but the purchase date and serial/date code are what pin down the year.

Quick guide: model number vs. serial number

Item	What it tells you	Best use
Model number (917276621)	Design and parts family	Ordering correct parts
Serial number / date code	Actual build timing	Determining the year
Purchase receipt	When it was bought	Warranty and ownership records

Why it matters

The build year affects small but important changes in parts and service procedures (deck hardware, belts, electrical harness routing). When you’re ordering wear items like blades or deck components, confirming the exact build information helps prevent mismatches.

If you’re also servicing the 42-inch deck, common related parts include the lawn tractor mandrel shaft assembly 587819701 and blade options such as the 3-in-1 blade, 42-in 532422719.

Last updated: February 2026