Craftsman 917387140 rotary lawn mower Parts

Common problems on a Craftsman walk-behind mower like model 917387140 are no-start conditions (stale fuel, dirty air filter, bad spark plug), hard-to-pull starter rope, and cutting issues caused by a loose blade or worn blade adapter. Our owner's manual troubleshooting chart covers the most frequent causes and fixes.

Most common symptoms and what to check first

• Won’t start: verify fresh gas, then check air filter and spark plug
• Starts then dies: stale fuel or water in fuel; drain and refill with fresh gasoline
• Starter rope hard to pull: blade or engine may be binding; inspect blade area first
• Poor cut or vibration: loose blade bolt, bent blade, or worn adapter
• Stops when you let go: normal safety operation; the control bar must be held to the handle

Quick no-start checklist (in order)

1. Fuel: confirm you have fuel and it is fresh (old fuel is a top cause).
2. Air filter: clean or replace if dirty (a clogged filter can prevent starting).
3. Spark plug: reconnect the plug wire if loose; replace the plug if fouled.
4. Control bar: hold the control bar firmly against the handle; a released bar prevents starting.
5. Blade/adapter: if the mower hit something, check for a loose blade or broken adapter.

Troubleshooting guide by symptom

Symptom	Most likely cause	What we recommend
No start	Dirty air filter, out of fuel, stale fuel, water in fuel	Clean/replace filter; drain and refill with fresh gas
No start	Spark plug wire off, bad spark plug	Reconnect wire; replace spark plug
Vibration	Loose blade or broken adapter	Tighten blade bolt; inspect/replace adapter
Won’t start unless bar held	Control bar released/defective	Hold bar to handle; replace control bar if damaged

Parts that commonly relate to these problems

If you find damage while inspecting the cutting system, these model-matched parts are commonly involved:

• Husqvarna lawn mower 20-in deck blade 532145106 (dull/bent blade causes poor cut and vibration)
• Lawn mower blade adapter 581547901 (a worn adapter can cause wobble and starting issues after impact)

Why it matters

Most “won’t start” complaints trace back to fuel quality, airflow (air filter), or ignition (spark plug). Catching a loose blade or failing blade adapter early also prevents excessive vibration that can damage the crankshaft and deck.

Last updated: February 2026

The model number for this Craftsman walk-behind mower is 917.387140 (often written without the dot as 917387140). You’ll find it printed on the mower’s model tag and shown on the cover pages of the owner's manual.

Where to find the model number on the mower

Check these common locations on Craftsman rotary lawn mowers:

• On the rear of the deck housing near the discharge opening
• On the side of the deck near a rear wheel
• Near the handle mounting area on the deck
• On a sticker or metal plate that also lists the serial number

Why the dot matters (917.387140 vs 917387140)

Both formats refer to the same mower; the dot is just a formatting style used in manuals and some labels.

You might see it as	What it means	When it’s used
917.387140	Same model number	Common in printed manuals
917387140	Same model number	Common on parts sites and searches

Why using the exact model number matters

Using the exact model number helps us match the correct parts diagrams and hardware for your mower, especially for items like the blade mounting stack-up and handle hardware.

• Helps ensure the correct blade and blade adapter fit
• Prevents ordering the wrong fasteners (nuts, bolts, washers)
• Improves accuracy when looking up repair parts lists

Example parts that are model-matched on this page

If you’re replacing cutting or mounting components, these are common items tied to the model’s parts list:

• Husqvarna lawn mower 20-in deck blade 532145106
• Lawn mower blade adapter 581547901
• Rope guide 586122501

Last updated: February 2026

A Craftsman rotary lawn mower like model 917387140 typically lasts 8 to 12 years with normal residential use and routine maintenance (cleaning, oil changes, blade care, and proper storage). Consistent tune-ups and avoiding impact damage are what most often determine whether it reaches the high end of that range.

What most affects lifespan on model 917387140

• Oil and air filtration habits: correct oil type and regular changes reduce engine wear.
• Blade and deck care: keeping the blade sharp and the deck clean reduces strain.
• Fuel practices: fresh fuel and proper off-season storage prevent hard-start issues.
• Cable and control condition: worn controls can cause unsafe operation or poor performance.
• Wheel and height hardware wear: worn spacers, knobs, and fasteners can lead to uneven cutting.

Maintenance targets that extend service life

Use the maintenance schedule and specs in the owner's manual for the exact intervals and procedures. For this mower, the manual lists key specs such as SAE 30 oil above 32°F, SAE 5W-30 below 32°F, and blade bolt torque of 35 to 40 ft. lbs.

Quick checklist (high impact)

• Change engine oil on schedule; keep oil at the correct level.
• Sharpen or replace the blade when it tears grass.
• Clean grass buildup from the underside of the deck.
• Inspect and adjust the zone control cable if the engine does not respond correctly.

Common wear items (and what they do)

Part	What it affects	Typical symptom when worn
Husqvarna lawn mower 20-in deck blade 532145106	Cut quality, engine load	Ragged cut, vibration, bogging
Lawn mower blade adapter 581547901	Blade mounting and drive	Blade wobble, poor cutting, vibration
Control cable 532168552	Engine zone control	Engine won’t stay running, control feels loose

Why it matters

A mower that is maintained to spec runs cooler, cuts with less resistance, and avoids vibration that can damage the crankshaft, blade adapter, and fasteners. That is the difference between replacing a few normal wear parts and retiring the mower early.

Last updated: March 2026