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How do I know what size mower blade I need?
For your Craftsman rotary lawn mower model 917387323, the safest way to confirm blade size is to match the replacement blade to your model’s parts list. This avoids guessing blade length, center hole pattern, and adapter fit; all three must match your deck.
The quickest way to choose the right blade
Use your model number (917387323) and select the exact blade listed for your mower. For this model, a commonly listed option is the husqvarna lawn mower 20-in deck blade 532145106.
What to match (not just length)
When you’re confirming mower blade size, we recommend checking these fit points:
- Cutting length (tip to tip across the blade)
- Center hole shape and size (round, star, “bow-tie”, etc.)
- Offset and lift (high-lift vs. mulching style affects airflow)
- Blade thickness (affects balance and bolt clamp)
- Adapter style (some decks require a specific adapter pattern)
Measuring a blade you already have
If you’re measuring the old blade, measure straight tip-to-tip (not diagonally). Also compare the center hole and any side holes to the replacement listing.
| What you’re checking | Why it matters | What to do |
|---|---|---|
| Blade length | Too long can hit the deck; too short leaves uncut strips | Measure tip-to-tip |
| Center hole pattern | Wrong pattern will not mount securely | Match the hole shape exactly |
| Lift style | Impacts bagging, mulching, and cut quality | Choose the same style as original |
Why it matters
A blade that does not match your deck and adapter can cause vibration, poor cutting, or damage to the blade mount. Using the model-matched blade keeps the mower cutting evenly and protects the crankshaft and blade hardware.
Related DIY help
If you’re replacing the blade, our guide on lawn mower blade removal tool helps you hold the blade safely while loosening the bolt.
Last updated: February 2026
What model number is a Craftsman 917387323 lawn mower?
The model number for this Craftsman walk-behind mower is 917387323. You’ll use 917387323 to look up the correct parts diagrams and order exact-fit replacement parts, such as the blade, blade adapter, and control cable.
Where to find the model number on the mower
On most Craftsman rotary lawn mowers, the model number is printed on a label or stamped on a plate. Check these common spots:
- On the rear of the deck near the discharge opening
- On top of the deck near the engine mounting area
- Near the handle mounting brackets
- On the back flap area (rear door) on bagging models
- On the frame near the wheels
Why the model number matters when buying parts
Craftsman model numbers can look similar, but small differences change the correct blade, hardware, and control components. Using 917387323 helps us match the right part ID and fit.
Examples of model-matched parts on this page
| What you’re replacing | Example part on this model page | What it does |
|---|---|---|
| Cutting blade | Husqvarna lawn mower 20-in deck blade 532145106 | Cuts grass; correct length and mounting pattern matter |
| Blade mounting hub | Lawn mower blade adapter 581547901 | Connects blade to crankshaft; worn adapters cause vibration |
| Operator control | Control cable 532168552 | Engages blade brake or drive control depending on setup |
Quick tips to avoid ordering the wrong part
- Match the model number exactly: 917387323 (all digits)
- Compare the part name and part ID, not just the part number
- If you’re replacing blade hardware, replace worn fasteners at the same time
- Inspect the blade adapter for rounding or cracking when changing the blade
For safe blade service steps and tool guidance, use our lawn mower blade removal tool article.
Last updated: February 2026
Why is my lawn mower engine running slow?
If your Craftsman rotary lawn mower model 917387323 is running slow, the most common causes are restricted airflow (dirty air filter), weak ignition (worn/fouled spark plug), or fuel delivery problems (stale gas or a dirty carburetor). Fixing the restriction usually restores normal RPM.
Quick checks that solve most “running slow” problems
- Turn the engine off and let it cool; disconnect the spark plug wire before touching moving parts.
- Check the air filter; clean or replace it if it is dark, oily, or packed with debris.
- Inspect the spark plug; replace it if the tip is black, wet, cracked, or the electrode is worn.
- Drain old fuel and refill with fresh gasoline (stale fuel is a top cause after storage).
- Look for grass buildup under the deck that can overload the engine; clean the underside.
- Verify the operator presence control (bail bar) is fully held; a partially engaged control can reduce power.
Fuel and carburetor symptoms (when air and spark look OK)
A mower that idles but bogs under load often has a partially clogged carburetor jet or restricted fuel flow.
| Symptom | Most likely cause | What to do first |
|---|---|---|
| Runs better with choke partly on | Lean fuel mixture, carb restriction | Refresh fuel; clean carb passages |
| Surges up and down | Carb varnish, air leak | Check fuel quality; inspect intake gaskets |
| Loses power in tall grass | Dull blade, deck packed with clippings | Clean deck; sharpen/replace blade |
Parts that can matter on this model
If the mower is vibrating, cutting poorly, or bogging because the blade system is slipping or damaged, inspect the blade mounting hardware and adapter.
- Lawn mower blade adapter 581547901
- Husqvarna lawn mower 20-in deck blade 532145106
- Washer blade 532401630
Why it matters
A slow-running engine usually means the engine is not getting the right air-fuel-spark balance or it is being overloaded. Running that way can increase fuel use, reduce cutting performance, and accelerate wear on the blade adapter, crankshaft area, and drive components.
For safe blade service and the right way to hold the blade while loosening the bolt, use our guide: lawn mower blade removal tool.
Last updated: February 2026
Is it cheaper to repair or replace a lawnmower?
For a Craftsman walk-behind mower like model 917387323, repairing is usually cheaper when the fix is a common wear part (blade, cable, fasteners) and you do the work yourself. Replacing the mower often makes more sense when the engine or deck is badly worn and multiple major parts are needed.
Quick way to decide (cost and effort)
Use this checklist to choose the lower-cost path:
- Repair if the mower ran well recently and the problem is isolated (won’t self-propel, poor cut, loose handle, hard to start after storage).
- Repair if you can complete the job with basic tools and 1 to 2 parts.
- Replace if the deck is rusted through or cracked, or the wheels/height adjusters are failing in multiple spots.
- Replace if the engine has low compression, heavy smoke, or persistent knocking (typically not cost-effective on walk-behind mowers).
- Replace if you need several big-ticket items at once (engine work plus drive system plus deck hardware).
Common repairs that are usually worth it on 917387323
These are typical, high-value fixes that restore performance quickly:
- Replace a worn or bent blade: husqvarna lawn mower 20-in deck blade 532145106
- Fix a dead operator control or drive engagement issue: control cable 532168552
- Correct blade wobble from a damaged hub: lawn mower blade adapter 581547901
- Tighten or replace missing blade hardware: washer blade 532401630 and lock nut 532409149
Repair vs replace comparison
| Situation | Usually cheaper | Why |
|---|---|---|
| Poor cut quality, vibration, uneven cut | Repair | Blade and adapter issues are straightforward and low parts cost |
| Pull cord issues after storage | Repair | Often maintenance-related, not a full mower replacement |
| Multiple structural problems (deck rust, handle mounts failing) | Replace | Labor and parts stack up quickly |
| Engine internal failure symptoms | Replace | Engine rebuild cost often exceeds mower value |
Why it matters
A walk-behind mower’s value is tied to the deck and engine. If those two are solid, replacing wear parts (blade, cable, fasteners) is the fastest way to get reliable mowing again without paying for a whole new machine.
For DIY help on a high-impact repair, we recommend starting with how to sharpen a lawn mower blade.
Last updated: February 2026
What are the common problems with Craftsman lawn mowers?
Common problems on a Craftsman walk-behind mower like model 917387323 are no-start conditions (fuel, spark, air), hard pulling or stuck starter rope, poor cutting from a dull or loose blade, and drive or control issues caused by worn cables or loose hardware. We start with quick checks, then move to fuel and ignition.
Quick checks we do first (fastest wins)
- Use fresh gasoline; old fuel is the #1 cause of hard starting after storage.
- Confirm the blade control (operator presence) lever is fully held against the handle.
- Check oil level; too much oil can make starting difficult.
- Inspect the air filter; replace if dirty or oil-soaked.
- Look for loose handle hardware that changes cable tension.
Most common symptoms and what usually causes them
| Symptom | Most likely causes | What to check first |
|---|---|---|
| Won’t start | Stale fuel, dirty carburetor, fouled spark plug, clogged air filter | Fresh fuel, air filter, spark plug |
| Starts then dies | Fuel restriction, carburetor varnish, venting issue | Fuel quality, tank cap vent, carburetor |
| Pull cord stuck/hard to pull | Blade obstruction, bent blade, engine issue | Tip mower safely, clear deck, inspect blade |
| Poor cut or vibration | Dull/bent blade, loose blade mounting | Blade condition, blade adapter, fasteners |
| Self-propel won’t pull (if equipped) | Cable out of adjustment, worn drive components | Cable condition and routing |
Parts that commonly affect performance on this model
If you’re seeing vibration, uneven cutting, or the blade feels loose, inspect the blade mounting stack and replace worn pieces as needed:
- Husqvarna lawn mower 20-in deck blade 532145106 (dull, bent, or damaged blade)
- Lawn mower blade adapter 581547901 (rounded hub or slipping blade)
- Washer blade 532401630 and lock nut 532409149 (missing or stripped fasteners)
- Control cable 532168552 (blade control or drive control not engaging consistently)
Why it matters
A mower that won’t start is usually a fuel or ignition maintenance issue, but vibration or a stuck pull cord can signal a blade or adapter problem. Fixing those early helps protect the crankshaft, deck, and drive system.
Helpful DIY guidance
- For safe blade service steps, use our lawn mower blade removal tool guide.
- For cutting quality and vibration, follow how to sharpen a lawn mower blade.
- If the starter rope won’t move, use lawn mower pull cord stuck.
Last updated: February 2026
