Craftsman 917277790 riding mower Parts

Replacing the engine on a Craftsman riding mower like model 917277790 typically costs $800 to $2,500 total (parts plus labor). The final price depends on whether you install a new engine or a rebuilt one, and how much related work is needed during the swap; see the 917277790 owner's manual for model-specific service and safety guidance.

Typical cost breakdown (what you usually pay for)

• Engine (new): $600 to $1,800
• Engine (rebuilt/used): $300 to $1,200
• Labor (shop install): $200 to $800
• Fluids and tune-up items: $25 to $150
• Optional add-ons (belts, wiring, battery cables): $0 to $300

Scenario	What’s included	Typical total cost
DIY swap	Engine + your time + basic supplies	$600 to $2,000
Shop swap	Engine + labor + setup/adjustments	$900 to $2,500
“While we’re in there” repair	Swap plus belts, wiring fixes, deck/drive checks	$1,100 to $3,000

What drives the price up on model 917277790

Engine replacement often uncovers related issues that add time and parts cost:

• Worn or cracked belts/pulleys (deck drive and ground drive)
• Electrical starting problems (solenoid, safety switches, corroded connections)
• Fuel system contamination (old fuel, clogged filter, dirty tank)
• Loose or missing hardware that must be replaced to mount the engine safely
• Deck and blade system adjustments after the engine is running

If the mower has intermittent no-crank or click-only symptoms, a starter circuit repair can be cheaper than an engine. A common electrical part involved is the lawn tractor starter solenoid 582042802.

Why it matters

A correct engine swap is not just “bolt it in and go”. After installation, the mower must run safely and reliably, and routine checks (belts, leaks, loose hardware, unusual sounds) help prevent repeat failures and downtime.

Safety notes we follow before any engine service

From the maintenance and safety guidance for this mower:

• Engage the park brake before service
• Disengage the blade/PTO control before service
• Keep the machine clear of grass and debris around hot engine/exhaust parts
• Let the mower cool down before working near the engine

Last updated: February 2026

Yes, replacing the engine on your Craftsman riding mower model 917277790 is worth it when the rest of the machine is in solid shape (deck, transaxle, steering, frame) and you want several more seasons of reliable mowing. If multiple major systems are worn out, putting that money toward a replacement mower is the better value.

Quick decision checklist

• The mower deck is structurally sound (no major cracks or severe rust-through)
• The drive system pulls strongly and does not slip or whine excessively
• Steering and brakes feel controlled and predictable
• You can complete routine maintenance safely (cleaning, oil changes, blade service)
• You can source the correct engine and mounting hardware for 917277790

Cost vs. value: a simple way to decide

A practical rule is to compare the total engine-swap cost (engine + any extras + labor) to the mower’s current value and condition.

What you’re seeing	What it usually means	Best move
Engine is the main failure; chassis and deck are good	One major repair restores usefulness	Replace engine
Engine plus drive/deck issues	Repairs stack up fast	Replace mower
You need maximum uptime (large yard, weekly mowing)	Reliability matters more than lowest cost	Replace engine if the rest is strong

What to inspect before you commit

We recommend checking these items first because they affect safety and long-term reliability:

• Deck condition and cut quality: the manual notes regular cleaning under the deck helps extend life; heavy buildup and corrosion shorten deck life.
• Loose hardware: the maintenance checklist calls out inspecting for loose screws and nuts; recurring loosening can signal wear.
• Belts and pulleys: worn belts or noisy pulleys can add cost right after an engine swap.
• Fuel system leaks: inspect for fuel and oil leakages before investing.

If you find missing or damaged fasteners during inspection, replacing common hardware like the locking flange nut 532409149 can help you tighten up assemblies correctly.

Why it matters

An engine replacement can restore power, starting, and mowing performance, but it does not fix underlying wear elsewhere. The manual emphasizes safe operation and using approved repair parts; starting with a thorough inspection helps you avoid spending engine money on a mower that still will not operate safely or reliably. See the 917277790 owner’s manual for maintenance checks and safe service steps (park brake set, blade switch disengaged).

Last updated: February 2026

Common problems we see on Craftsman riding mowers like model 917277790 include starting or charging issues, slow or uneven drive, mower deck engagement failures, and poor cut quality. Many of these trace back to belt condition, electrical connections, safety switches, and routine deck cleaning; see the 917277790 owner's manual for model-specific checks.

Most common symptoms (and what they usually point to)

• Won’t crank or intermittent starting: weak battery, loose battery cables, bad solenoid, or a safety interlock issue
• Battery not charging: poor cable connections, disconnected charging lead, or a charging-system fault
• Moves slowly or not at all: park brake left on, bypass linkage engaged, or a loose/off drive belt
• Deck won’t engage: loose deck belt, loose clutch connection, faulty blade (PTO) switch, or a blown fuse
• Uneven cut: tire pressure mismatch, dull/bent blades, deck not level, or grass buildup under the deck

Quick checks we recommend first

1. Park on level ground, set the park brake, and remove the key.
2. Inspect belts for glazing, cracking, or being off a pulley.
3. Confirm the bypass linkages are in the drive position (not bypass).
4. Check the fuse and look for loose or corroded battery terminals.
5. Clean the underside of the mower deck; grass buildup is a top cause of poor cutting.

Troubleshooting guide by problem area

Problem area	What you notice	Common fix path
Electrical (start/charge)	clicks, no crank, dead battery	clean/tighten cables, test battery, test solenoid and charging output
Drive system	slow, uneven, no movement	release brake, disengage bypass, inspect/replace drive belt
Deck engagement	blades won’t start	inspect deck belt, check PTO switch, check clutch wiring, check fuse
Cut quality	scalping, streaks, clumps	set tire pressure, level deck, sharpen/replace blades, clean deck

Parts that commonly get involved

If your symptoms match, these model-compatible parts are often part of the repair:

• Lawn tractor starter solenoid 582042802 (no-crank or click-no-start)
• Switch.pto.8 582107601 (deck will not engage)
• Lawn tractor ground drive belt, 1/2 x 56-5/16-in 539110411 (slow or no movement)

Why it matters

Catching belt wear, loose electrical connections, and deck buildup early prevents bigger failures (burned belts, damaged pulleys, poor traction, and inconsistent mowing). It also keeps operation safer, especially on slopes and when loading for transport.

Last updated: February 2026

For Craftsman model 917277790, the operator information describes a four-stroke overhead valve (OHV) engine (internal combustion). For the exact engine make, model, and horsepower rating on your mower, we recommend matching the engine ID label to the specifications listed in the 917277790 operator's manual.

What we can say for this model

The documentation for this Craftsman riding mower platform calls out these engine characteristics:

• Internal combustion engine (gas)
• Four-stroke design
• Overhead valve (OHV) configuration
• Engine power ratings are typically stated using SAE gross power standards
• Engine-specific details are provided by the engine manufacturer

How to identify the exact engine on your mower

Because engine suppliers and sub-models can vary, the fastest way to confirm what you have is to read the engine label and compare it to the manual.

• Locate the engine ID label (commonly on the blower housing, valve cover area, or near the muffler)
• Write down the engine model, type, and code (or serial)
• Compare those numbers to the specifications section in the 917277790 operator's manual
• If you are ordering engine-related parts, match by the engine model number, not only the mower model

Quick ID checklist

What you’re checking	Where to look	Why it matters
Engine model/type/code	Engine label plate or sticker	Ensures correct tune-up and fuel system parts
OHV / 4-stroke	Usually stated on label or manual	Confirms oil type and maintenance approach
Safety interlocks	Seat, brake, blade controls	Affects starting and PTO engagement

Why it matters

Using the correct engine identification prevents wrong-part returns and helps you follow the right maintenance schedule (oil changes, spark plug service, air filter intervals), which directly affects starting, power under load, and engine life.

Last updated: February 2026

The Craftsman T110 is a riding mower model name, not an engine model number. On your Craftsman riding mower, the engine model is listed on the engine’s ID plate or stamped on the valve cover; for this Sears model 917277790, those engine ID details are what you use to match the correct engine parts.

Where to find the engine model number

Use the identification points called out in the 917277790 operator’s manual. On most Craftsman riders, you will find:

• Engine model/type/code on the engine ID plate (often near the blower housing) or on a valve cover stamp
• Mower manufacturing number on a printed plate in the engine compartment
• Serial number on the same mower ID plate

What to write down before ordering parts

Having the right numbers prevents ordering the wrong starter, solenoid, belt, or switch.

• Engine model
• Engine type
• Engine code
• Mower model number: 917277790
• Mower serial number

Quick ID guide (engine vs. mower)

Item you’re identifying	What it tells you	Where you’ll see it
Mower model number (917277790)	Which Craftsman rider you own	Mower ID plate, operator manual cover
Engine model/type/code	Which engine parts fit	Engine ID plate or valve cover stamp
Mower serial number	Production run details	Mower ID plate

Why it matters

“Craftsman T110” is commonly used in listings and retail descriptions, but parts lookups depend on the engine’s model/type/code. That is especially important for electrical parts like a starter solenoid or PTO switch.

If you’re troubleshooting a no-crank or no-start condition, a common first check is the starter circuit and connections; the lawn tractor starter solenoid 582042802 is one of the electrical parts used on this model family.

Last updated: February 2026

The Craftsman riding mower model 917277790 does not have a single built-in “model year” like a car; the year is tied to the purchase date and the serial number/date code on the mower. Use the identification section in the 917277790 operator’s manual to locate the correct tag and record the serial information.

How to find the year on your 917277790

On Craftsman riders, the most reliable way to determine the year is to use the product identification label (model and serial) and decode the serial/date code format used on that label.

• Look for the ID label under the seat, on the frame near the rear fender, or near the engine plate area
• Write down the model number (917277790) and the full serial number exactly as shown
• If the label includes a date code, use that to determine the build date
• If you are ordering parts or requesting service, keep the purchase year with your records
• If the label is damaged, check for a secondary label or stamped number on the frame

What we can confirm from the manual

The operator’s manual confirms the model identification used for this equipment.

Item	What to use	Where it helps
Model number	917277790	Matching parts diagrams and assemblies
Serial/date code	From the ID label	Determining build date/year
Purchase year	From your receipt	Service and parts ordering

Why it matters

The correct year (or build date range) helps ensure you get the right belt, electrical parts, and deck components for your exact configuration. For example, starting and PTO engagement issues often trace back to electrical components like the lawn tractor starter solenoid 582042802 or the PTO switch.

Last updated: February 2026