Craftsman 917388370 rotary lawn mower Parts

On the Craftsman rotary lawn mower model 917388370, the model number is typically printed on a sticker on the back of the mower deck, usually between the lower handle mounts. Wipe the deck clean first so the label is easy to read.

Where to look on the mower

Check these common label locations on walk-behind mowers:

• Back of the deck, between the lower handle mounts (most common)
• Rear discharge area near the flap (if equipped)
• Side of the deck near a rear wheel bracket
• Under the handle crossbar area (less common)

Tips to read the label clearly

Dirt and grass buildup can hide the sticker. We recommend:

• Turn the mower off and let the engine cool completely
• Brush off dry clippings, then wipe with a damp rag
• Use a flashlight and take a photo to zoom in on small print
• Write down the full model number and any serial number shown

What the model number helps you match

Having the correct model number (like 917388370) helps ensure you get the right parts and diagrams for your Craftsman mower.

What you need	Why it matters
Model number	Matches the correct parts list for your exact deck and handle setup
Serial number	Helps narrow down production changes and compatible replacements
Engine model (if listed)	Helps match engine-specific items like ignition and fuel parts

Why it matters

Small differences in deck design, blade mounting, and control cable routing can change which replacement part fits. Using the exact model number prevents ordering the wrong blade, fastener, or control cable.

For common maintenance and identification help, use our DIY guide: easy diy lawn mower repairs.

Last updated: January 2026

For the Craftsman rotary lawn mower model 917388370, we use regular unleaded 87 octane (AKI) in normal conditions; 93 octane does not improve power or reliability in small mower engines. The bigger priority is using clean, fresh fuel and storing it correctly.

What to use (and what not to)

• Use 87 octane (AKI) unleaded gasoline for everyday mowing.
• Skip 93 octane unless your engine specifically requires it (most walk-behind mowers do not).
• Avoid old gas; fuel can start causing problems after about 30 days in storage.
• Use a fuel stabilizer if the mower will sit more than a few weeks.
• Do not mix in oil unless your mower is a 2-cycle engine (most Craftsman walk-behind mowers are 4-cycle).

Quick comparison

Fuel choice	When it makes sense	What you gain
87 octane (regular)	Normal mowing, most conditions	Correct performance and easiest starting
93 octane (premium)	Rarely needed for walk-behind mowers	Typically no benefit
Fresh fuel + stabilizer	Storage, seasonal use	Fewer carburetor and starting issues

If the mower runs rough after refueling

If your 917388370 starts surging, stalling, or won’t start after sitting, stale fuel is a common cause. We recommend:

• Drain old fuel and refill with fresh 87 octane
• Check the air filter and spark plug condition
• Inspect the blade area for heavy grass buildup that can load the engine
• If you’re servicing the blade, replace worn hardware such as the lock nut 532409149 when needed

For step-by-step help on fuel-related starting issues, use how to keep lawn mower gas from going bad.

Why it matters

Using the right octane is less important than fuel freshness. Fresh 87 octane helps your mower start easier, run smoother, and reduces varnish buildup that can clog the carburetor during storage.

Last updated: January 2026

A Craftsman rotary lawn mower like model 917388370 typically lasts 8 to 12 years with normal residential use and basic maintenance. Blade impacts, dusty mowing conditions, and skipped oil changes shorten life; regular tune-ups and timely part replacement extend it.

What affects lifespan most

• Engine maintenance: clean oil, clean air filter, fresh fuel
• Blade condition: a bent or dull blade increases vibration and engine load
• Deck care: grass buildup holds moisture and accelerates rust
• Cable and control wear: stretched or sticky controls reduce safe operation
• Storage: dry, covered storage prevents corrosion and fuel-system issues

Maintenance schedule that gets you to the high end

Task	Typical interval	Why it matters
Change engine oil	Every season or ~25 hours	Prevents internal wear and overheating
Sharpen/replace blade	1 to 3 times per season	Cleaner cut, less strain on crankshaft
Clean underside of deck	After mowing (when cool)	Reduces rust and improves airflow
Inspect fasteners and controls	Monthly in season	Prevents vibration damage and unsafe operation

Parts that commonly extend mower life

Replacing wear items early prevents bigger failures. For model 917388370, common examples include:

• Lawn mower blade 532406713 if the blade is bent, cracked, or won’t balance
• Lawn mower blade adapter 581547901 if the blade slips, wobbles, or the adapter is rounded
• Control cable 532168552 if the drive or engine control feels loose, sticky, or won’t fully engage

Why it matters

A mower near end-of-life often shows hard starting, excessive vibration, uneven cutting, or repeated loosening of blade hardware. Addressing the blade, adapter, and controls early protects the engine crankshaft and deck, which are the most expensive components to replace.

Last updated: March 2026