Craftsman 917387660 rotary lawn mower Parts

For the Craftsman rotary lawn mower model 917387660, we recommend using gasoline that is no more than 30 days old; after that, fuel can go stale and cause hard starting and rough running. For exact fuel and storage guidance, follow the 917387660 owner's manual.

What to do if gas is older than 30 days

• Drain the gas can into an approved container for proper disposal or use in equipment that allows it.
• Refill with fresh, clean, regular unleaded gasoline (minimum 87 octane).
• If the mower has old fuel in the tank, run the engine until it uses up the fuel, then refill with fresh gas.
• If the mower will sit 30 days or longer, empty the tank and run the engine until the fuel lines and carburetor are empty.
• Avoid adding engine or carburetor cleaner products to the fuel tank.

Quick guide: fuel age and best practice

Fuel situation	What we recommend	Why
Fresh fuel (0 to 30 days)	Use it normally	Best starting and performance
Older than 30 days	Replace with fresh fuel	Reduces “stale fuel” no-start issues
Storage 30+ days	Empty tank and run carburetor dry	Helps prevent moisture-related fuel system damage

Why it matters

Stale fuel and alcohol-blended fuels can attract moisture during storage, which can lead to separation and acidic fuel that damages the fuel system. Fresh fuel helps prevent common “won’t start” problems tied to stale gas.

Last updated: January 2026

The most common issues we see on the Craftsman 917387660 rotary lawn mower involve starting and power loss, uneven cutting, poor self-propel/drive performance (if equipped), and control or hardware loosening at the handle and wheels. Many of these problems trace back to normal wear items and simple adjustments in the 917387660 owner's manual.

Common symptoms and what usually causes them

• Hard starting or won’t start: stale fuel, dirty air filter, fouled spark plug, or a sticking throttle/governor linkage.
• Rough running or surging: partially clogged carburetor jet, restricted fuel cap vent, or throttle cable out of adjustment.
• Uneven cut or poor cut quality: dull/bent blade, blade installed incorrectly, deck packed with wet grass.
• Excess vibration: bent blade, damaged blade adapter, loose blade bolt/hardware.
• Height won’t hold or wheels feel loose: worn wheel hardware, loose brackets/fasteners, damaged wheel.

Quick checks we recommend first (fast, no special tools)

1. Use fresh fuel; drain old fuel if it smells sour or looks dark.
2. Inspect and clean the underside of the deck (disconnect the spark plug wire first).
3. Check blade condition and tightness; replace worn parts as needed.
4. Verify the throttle control moves smoothly and returns freely.
5. Re-tighten handle and wheel fasteners after the first few uses each season.

Parts that commonly fix these problems on model 917387660

Symptom	Likely wear part	Example part for this model
Poor cut, tearing grass	Blade	Lawn mower blade 532406713
Vibration, blade won’t stay aligned	Blade adapter	Lawn mower blade adapter 532418373
Engine speed control issues	Throttle cable	Lawn mower throttle cable 532168552
Wheel wobble or height issues	Wheel	Wheel.8x1.75 532427026

Why it matters

Running with a dull blade or a loose blade adapter increases vibration, which can damage the crankshaft, loosen fasteners, and make the mower unsafe to operate. Keeping the blade system and controls tight and adjusted helps the mower cut cleaner and last longer.

Last updated: March 2026

The model number is 917.387660 (often written without the dot as 917387660) for this Craftsman rotary lawn mower. You’ll see it printed on the mower’s model label and on the cover page of the 917387660 owner's manual.

Where to confirm the model number on the mower

Check these common locations on Craftsman walk-behind mowers:

• On the mower deck near the rear wheels
• On the rear discharge area or side discharge chute area
• Near the handle mounting brackets
• On a sticker or metal tag that also lists engine details

Why the exact model number matters

Craftsman model numbers control the correct parts lookup for items like the blade, blade adapter, and control cables. For example, the parts list for model 917.387660 includes a rope guide and handle hardware that must match your exact configuration.

Common parts that depend on the model number

• Blade and blade mounting hardware
• Throttle or engine zone control cable routing
• Wheel and height-adjustment components
• Handle bolts, knobs, and brackets

Quick format guide (what you might see)

How it may appear	What it means
917.387660	Standard manual/label format with a dot
917387660	Same model number without punctuation

Related part example (for identification)

If you are matching parts after confirming the model number, one common wear item for this mower is the lawn mower blade 532406713.

Why it matters

Using the correct model number prevents ordering a blade, cable, or wheel part that looks similar but mounts differently, which can cause poor cutting performance or unsafe operation.

Last updated: January 2026