Craftsman 917372470 22" rotary lawn mower Parts

Yes. For the Craftsman 917372470 22-inch rotary lawn mower, SAE 10W-30 oil is an approved option; the manual lists SAE 30 as the primary fill and says SAE 10W-30 can also be used (do not use SAE 10W-40). For exact fill and service intervals, follow the owner's manual.

What oil to use (and what to avoid)

Use these guidelines for this model:

• Preferred oil: SAE 30
• Allowed alternative: SAE 10W-30
• Do not use: SAE 10W-40
• Use case: 10W-30 is especially helpful for easier starting in cooler temperatures
• Always check level: before each use; fill only to the FULL line on the dipstick

Quick oil change checklist

Before servicing, let the engine cool and work on a flat surface.

• Disconnect the spark plug wire to prevent accidental starting
• Remove the oil cap/dipstick and set it on a clean surface
• Tip the mower on its side and drain oil into a suitable container
• Refill with SAE 30 or 10W-30 to the FULL line (do not overfill)
• Reinstall the cap/dipstick and reconnect the spark plug wire

Service timing (what to expect)

This mower’s maintenance schedule is straightforward:

Maintenance item	When to do it
First oil change	After the first 2 hours of mowing
Routine oil changes	Every 25 hours (more often in dusty or dirty conditions)
Oil level check	Before each use

Why it matters

Using the correct viscosity helps protect the engine at operating temperature and improves starting when it is cold. Overfilling or using SAE 10W-40 can increase wear, smoking, or performance problems.

Last updated: February 2026

A “Craftsman 6.75” label usually refers to the engine rating, not the mower’s model number. For the Craftsman walk-behind mower covered by this page, the model number is 917.372470, and the model/serial decal is attached to the rear of the mower housing (see the owner's manual).

Where to find the model number on the mower

We use the mower’s model number (not the engine label) to match the correct parts list, diagrams, and maintenance specs.

• Look for a decal on the rear of the lawn mower housing
• Record both the model number and serial number for future reference
• Clean grass and dirt off the rear housing so the decal is readable
• Use the model number when ordering common wear items like blades and adapters

“6.75” vs. model number: what’s the difference?

“6.75” is commonly used as an engine identifier on older Craftsman mowers; the mower model number is a separate identifier used for parts lookup.

Marking you see	What it usually means	What to use for parts
6.75 (or similar)	Engine rating/series label	Use the mower model number decal
917.xxxxxx	Craftsman mower model number	Use this to find diagrams and parts

Why it matters

Using the correct model number prevents ordering the wrong blade, blade adapter, wheels, or hardware. Even mowers with similar engine labels can use different decks, drive systems, and mounting hardware.

Parts you may commonly match by model

Once you confirm the model number, we can match exact-fit parts for your mower, such as:

• Lawn mower blade adapter 581547901
• Lawn mower wheel 582943001
• Drive cover 582952501

Last updated: February 2026

For a Craftsman walk-behind mower like model 917372470, the serial number identifies the specific unit, but the year is not reliably encoded in a universal “MMDDYY” format across Craftsman mowers. We use the serial number mainly to match the correct parts and specifications shown in the owner's manual.

Where to find the model and serial number

On model 917372470, the manual specifies that the model and serial numbers are on a decal attached to the rear of the lawn mower housing. Record both for future parts lookups and service history.

• Look at the rear of the mower deck/housing for the decal
• Write down the full model number (917372470)
• Write down the entire serial number exactly as printed
• Keep the date of purchase with your records
• Use the serial number when comparing parts diagrams and hardware

How we use the serial number (and what it tells you)

Serial numbers are most dependable for identifying production runs and correct part fit, not for decoding a build date from the first 6 digits.

What you want to know	Best source to use	Why it works
Approximate mower age	Purchase date and maintenance records	Most accurate for ownership timeline
Correct replacement parts	Model number plus serial number	Helps match revisions within a model
Engine tune-up specs	Owner's manual	Lists specs like plug type and torque

If you are trying to date the mower anyway

Use these checks to narrow it down without guessing from the serial number format:

• Check your receipt or any registration paperwork for the purchase date
• Compare your mower’s configuration to the diagrams and specs in the owner's manual
• If you are replacing wear items, match by model and configuration (for example, the lawn mower blade adapter 581547901 is a common fit-critical part)
• If decals are missing, use the model number to pull the correct parts list, then match by measurements and mounting style

Why it matters

Using the wrong “serial number date code” can lead to ordering the wrong blade adapter, fasteners, or drive components. Matching by model 917372470 and the actual serial number is the most reliable way to keep parts compatibility correct.

Last updated: February 2026

For your Craftsman model 917372470 22-inch rotary lawn mower, the most reliable way to identify the correct replacement blade is to match the mower’s model number to the blade listed in the parts diagram and parts list in the owner's manual. If you are confirming fit by measurement, also verify blade length and the center mounting pattern.

The fastest way to identify the right blade

We recommend using these checks in order:

• Use model number 917372470 to look up the exact blade in the parts list/diagram
• Confirm the mower deck size (this model is a 22-inch rotary mower)
• Compare the blade’s center hole and any alignment features to your current blade
• If you remove the blade, inspect the adapter key and hub condition (a damaged adapter can mimic a “wrong blade” fit)
• Replace worn mounting hardware if it is damaged or won’t tighten securely

What to measure if you are matching by size

If you are comparing blades by physical dimensions, use this checklist:

What to check	What it affects	How to check
Blade length	Cut width and deck clearance	Measure tip-to-tip
Center hole / mounting pattern	Whether it mounts to the adapter	Compare to old blade
Blade thickness	Strength and balance	Compare side-by-side
Lift style (standard vs high-lift)	Bagging and discharge performance	Match the original style

Related parts that often matter with blade fit

A blade can seem “wrong” when the adapter or fasteners are worn. If you see rounding, cracking, or a loose fit at the hub, check the lawn mower blade adapter 581547901.

Common hardware items that may also need replacement during blade service include:

• Lock nut
• Washer(s)
• Blade bolt and lockwasher (as applicable)

Why it matters

A properly matched, sharp, and securely mounted blade cuts cleaner and reduces vibration. The manual also warns that a loose blade is dangerous and can make the engine hard to start; correct fit and proper tightening torque are critical.

Last updated: February 2026

Repairing your Craftsman 917372470 22-inch rotary lawn mower is usually cheaper when the fix is small (blade adapter, wheels, fasteners, or a drive cover). Replacing the mower makes more sense when the engine or deck is badly damaged, or when multiple major repairs stack up.

Quick decision checklist

• Repair if the mower starts, runs smoothly, and the issue is limited to wear parts (blade, adapter, wheels, bagging parts).
• Repair if the mower only needs a few hardware items (nuts, washers, screws) or a single broken component.
• Replace if the mower has severe vibration after impact and repairs would involve multiple drivetrain or deck components.
• Replace if the deck is cracked/rusted through or the crankshaft is bent (often shows up as persistent heavy vibration).
• Repair if you can do the work safely and follow the maintenance steps in the owner's manual.

Typical cost drivers (what usually changes the math)

Situation	Usually cheaper	Why
One part failure (wheel, cover, adapter)	Repair	Parts and labor time stay low
Several small issues at once	Depends	Multiple parts plus time can add up
Engine problems (hard starting, low power)	Depends	Diagnosis and parts can exceed mower value
Deck or crank damage after hitting an object	Replace	Structural repairs are rarely cost-effective

Parts that commonly make a repair worthwhile

If the mower is otherwise in good shape, these model-matched parts often restore performance quickly:

• Lawn mower blade adapter 581547901 (common cause of vibration or poor cutting after blade strikes)
• Lawn mower wheel 582943001 (worn tread, wobble, or height issues)
• Drive cover 582952501 (protects the drive area; damage can lead to debris intrusion)

Why it matters

The manual stresses stopping the engine and disconnecting the spark plug wire after hitting a foreign object, then inspecting and repairing damage before mowing. That inspection step is what prevents a small, cheap repair from turning into a bigger, expensive failure later.

Last updated: February 2026