Craftsman 917254230 38" 5-speed mower lawn tractor Parts

A lawn mower engine on a Craftsman 917254230 riding tractor is built around fuel delivery, air intake, ignition, and rotating internal parts that create power. Knowing the main engine components helps you diagnose common no-start, rough-running, and power-loss problems faster.

Main lawn mower engine parts (what they do)

• Fuel tank and fuel line: store and deliver gasoline to the carburetor
• Carburetor: mixes fuel and air in the right ratio for combustion
• Air filter: keeps dirt out of the engine; a clogged filter causes rich running and power loss
• Spark plug: ignites the fuel-air mixture
• Ignition coil (magneto): generates spark voltage at the correct time
• Flywheel: smooths engine rotation; magnets on it trigger ignition timing
• Starter system: recoil starter on walk-behinds; electric starter motor and solenoid on many tractors
• Crankshaft and connecting rod: convert piston movement into rotating power
• Piston, rings, and cylinder: create compression and power during combustion
• Crankcase and oil system: holds oil and lubricates internal parts
• Muffler: reduces exhaust noise and directs hot exhaust away

Quick troubleshooting: symptom to check first

Symptom	Most common engine-area checks	What to do next
Won’t start	Fuel quality, spark plug, ignition safety interlocks	Verify spark, then verify fuel delivery
Starts then dies	Carburetor, fuel cap venting, dirty air filter	Clean/replace filter; inspect carburetor
Runs rough	Air filter, carburetor, spark plug condition	Tune-up items first
Low power	Clogged air filter, stale fuel, belt load from deck	Reduce load; service intake and fuel

Parts on this model page that relate to engine operation

These parts are not internal engine parts, but they commonly affect “engine won’t crank” or “won’t start” complaints on a riding mower:

• Lawn tractor ignition switch 532365402 (key switch; can prevent cranking)
• Muffler 583638801 (exhaust component; damage can increase noise and affect performance)
• Cap dipstick 692013 (oil fill and dipstick cap; helps maintain proper oil level)

Why it matters

When we separate spark, fuel, and air into their main components, we can test in a logical order and avoid replacing the wrong parts. On riding tractors, starting issues are often electrical or safety-switch related even when the engine itself is fine.

Last updated: February 2026

For a Craftsman riding mower like model 917254230, your model number is on the product identification label on the tractor (not on the engine). On most front-engine Craftsman lawn tractors, you will find it under the seat area or on the frame near the seat.

Where to look on a Craftsman riding mower

Check these common label locations first:

• Under the seat (flip the seat forward and look on the underside or the seat pan area)
• On the frame rail directly below the seat
• Near the rear fender or rear frame area behind the seat
• Under the hood near the dash tower (less common)
• On the left or right side of the chassis near the footrest

What the model number looks like

For this Sears PartsDirect model page, the model number format is numeric: 917254230. When you find the label, match the full number exactly.

Label item	What it’s used for	Example for this tractor
Model number	Finds the correct parts diagrams and part fit	917254230
Product number	Helps narrow down exact build variations	Varies
Serial number	Identifies your specific unit	Varies

If the label is missing or unreadable

Use these practical cross-checks to confirm you have the right tractor:

• Confirm it is a Craftsman front-engine riding mower
• Match the deck size and drive type (this model is a 38-inch 5-speed lawn tractor)
• Compare your worn items to known-fit parts, such as the lawn tractor ignition switch 532365402
• If you are replacing belts, compare routing and length to the v-belt dr 532125907

Why it matters

The correct model number ensures we show you the right Craftsman parts (belts, pulleys, steering parts, and electrical switches) so you avoid ordering a part that looks similar but does not fit your chassis.

Last updated: February 2026

The Craftsman riding mower model 917254230 does not map to one single “model year”; this model series was sold across multiple years. For the most accurate year, we use the product’s ID tag information (often under the seat or on the frame) and match it to the correct parts breakdown for 917254230.

How to identify the year on model 917254230

Use these checks on your Craftsman 38-inch 5-speed lawn tractor:

• Look for a product identification label under the seat, on the rear fender pan, or on the frame near the engine.
• Write down the model number (917254230) and any serial number shown.
• If you see a separate manufacture date or date code, record it exactly.
• Compare the tractor’s configuration (deck size, transmission type, steering parts) to the parts used on your unit.
• If your mower has been repaired before, confirm the current setup by checking common wear items like belts and pulleys.

Parts clues that help narrow down the production run

Even without a single “year,” the parts used on your tractor can help confirm which version you have.

What you check	What it tells us	Example part for this model
Ground drive system	Confirms 5-speed drive layout and belt routing style	V-belt dr 532125907
Mower deck drive	Confirms deck belt length/profile used on your deck	Lawn tractor blade drive belt 532106085
Electrical start	Confirms key switch style used on your dash	Lawn tractor ignition switch 532365402

Why it matters

Craftsman tractors that look similar can use different belt lengths, idler setups, and electrical switches depending on the production run. Matching the correct year or build version prevents ordering the wrong drive belt, blade belt, or ignition parts and saves time during repair.

Last updated: February 2026