Craftsman 917377240 rotary lawn mower Parts

The Craftsman 917377240 is a walk-behind gas rotary lawn mower model, and its price depends on condition (new vs. used), season, and what is included (bagger, mulching parts, recent tune-up). For the most accurate identification and specs before comparing listings, use the 917377240 owner's manual.

Because the 917377240 is an older-style 21-inch, self-propelled gas mower (7.0 HP class), pricing is usually based on the used market.

• Non-running / for parts: typically $20 to $75
• Running, average condition: typically $75 to $200
• Clean, serviced, ready-to-mow: typically $150 to $300
• Collector-level or fully rebuilt: can be higher, depending on local demand

These items strongly affect price because they drive repair cost and safety.

• Engine starts easily and runs without surging
• Self-propel drive engages and pulls consistently (belt and drive control condition)
• Deck is solid (no rust-through or cracks)
• Blade and hardware are in good shape (no severe vibration)
• Wheels roll smoothly and height adjusters hold position

Paying a little more for a mower that drives correctly and cuts smoothly often costs less than buying a cheap unit that needs a belt, blade, and tune-up parts right away.

Last updated: February 2026

The Craftsman rotary lawn mower model 917377240 takes 20 ounces (0.625 quart) of engine oil for a normal fill. We recommend confirming the fill procedure and oil type in the 917377240 owner's manual and always checking the dipstick level on a flat surface before mowing.

Use ounces for accuracy; small overfills can cause smoking and hard starting.

• Oil capacity: 20 oz
• Add oil slowly, then recheck the dipstick
• Keep the level at the FULL mark (not above it)
• Do not tip the mower with the air filter or carburetor side down (oil can flood the intake)
• Change oil on schedule; more often in dusty, hot conditions

1. Shut the engine off and let it cool.
2. Park on a level surface.
3. Remove dipstick, wipe clean, reinstall fully, then remove to read.
4. If low, add a small amount, wait briefly, and recheck.

Correct oil level protects the engine from accelerated wear. Overfilling can push oil into the air intake, leading to smoke, fouled spark plug symptoms, and poor performance.

Last updated: February 2026

To look up the model number for your Craftsman mower, find the model and serial number label on the mower and match it exactly when searching parts. For Craftsman rotary walk-behind mower model 917.377240, the 917.377240 owner's manual shows the full model format and where it’s used for parts identification.

On most Craftsman walk-behind rotary mowers, the model/serial label is typically on the mower deck (often near the rear), on the rear shield, or near the handle mounting area.

Check these common spots:

• Top of the deck near the engine (look for a sticker or metal tag)
• Rear discharge area or rear shield
• Side of the deck near a rear wheel height adjuster
• Handle bracket area (where the upper and lower handles bolt together)
• Under the grass bag door area (if equipped)

Use the full model number exactly as printed (including dots). For this mower, the manual lists it as 917.377240.

Recommended steps:

• Write down the model number and serial number from the label
• Search using the full model number (example: 917.377240)
• Confirm the part fits by matching the part description in the parts diagram
• If you are working on the drive system, match parts by the drive control and belt section

Craftsman model numbers identify the exact deck, drive system, and handle controls used on your mower. That prevents ordering a belt, wheel, or control cable that looks similar but mounts differently.

If you’re identifying drive components, the lawn mower ground drive belt, 3/8 x 33-9/16-in 532169778 is one example of a model-matched part where the correct model number is essential.

Last updated: February 2026

For the Craftsman rotary lawn mower model 917377240, use SAE 30 engine oil when temperatures are above 32°F, and use SAE 5W-30 when temperatures are below 32°F. The engine oil capacity is typically 20 oz (initial fill is about 18 oz). See the 917377240 owner's manual for the exact procedure.

Use oil that meets API service SF through SJ (as listed in the manual). Keep the oil level at the FULL mark on the dipstick and avoid overfilling.

• Above 32°F: SAE 30
• Below 32°F: SAE 5W-30
• Oil capacity (change): about 20 oz
• Initial fill: about 18 oz (some residual oil may be present from factory testing)
• Check oil: before each use, and again after about 5 hours of continuous operation

Regular oil changes protect the crankshaft, piston, and bearings from wear.

• Change oil every 25 hours of operation
• Change oil at least once per season (or once per year if you do not reach 25 hours)
• Change more often in dusty or dirty mowing conditions

Using the correct viscosity helps the engine lubricate properly at startup and under load. Too-thick oil in cold weather can make starting harder; overfilled oil can cause heavy smoking from the muffler.

Last updated: February 2026

Craftsman model 917377240 is a model number, not a date code; it does not directly tell the year. To find the year your mower was built, we use the product ID/serial number label on the mower and match it to the date-code format shown in the 917377240 owner's manual.

On most Craftsman walk-behind mowers like the 917377240, the date you need is tied to the serial/product number label, not the model number.

Check these common locations:

• Rear of the deck near the discharge opening
• Top of the deck near the engine mounting area
• Under the handle mounting area
• On the rear door or rear deck panel (bagging area)

Many Craftsman mowers use a numeric date code on the label. A common format is MMDDYY (month, day, year). Once you locate the code, read it like this:

• First 2 digits: month
• Next 2 digits: day
• Last 2 digits: year

The build year helps us match the correct parts and diagrams for your Craftsman rotary lawn mower, especially for drive system items like the lawn mower ground drive belt, 3/8 x 33-9/16-in 532169778 and controls that can change across production runs.

Last updated: February 2026