Owner’s manual
View engine
How much oil does a Craftsman 917387500 lawn mower take?
The Craftsman 917387500 gas walk-behind lawn mower engine holds 20 oz (about 0.6 qt) of oil when filling to the full line on the dipstick. We recommend adding oil slowly, then rechecking the dipstick level to avoid overfilling; see the 917387500 owner's manual.
How to fill the oil correctly
- Set the mower on a level surface.
- Clean around the oil fill so dirt does not fall into the crankcase.
- Add oil slowly until it reaches the full mark on the dipstick.
- Tighten the cap, then remove it again to recheck the level.
- Check oil before each use; top off to the full line as needed.
Oil type and maintenance intervals
The manual specifies using a high-quality detergent oil with API service classification SF-SJ, and choosing the SAE viscosity based on temperature.
| Task | Interval (typical for this model) | Notes |
|---|---|---|
| Check oil level | Before each use | Fill to full line on dipstick |
| Change engine oil | Every 25 hours or each season | More often in dusty or dirty conditions |
| Recheck oil during long mowing | About every 5 hours of continuous use | Helps prevent running low |
Why it matters
Running low on oil can quickly damage the engine, and overfilling can cause smoking and poor performance. Keeping the level at the dipstick full mark helps the mower start easier and last longer.
Last updated: February 2026
Should I use 87 or 91 gas for lawn mower?
For the Craftsman gas walk-behind lawn mower model 917387500, we recommend using 87-octane (regular) unleaded gasoline for normal mowing. Higher octane (like 91) does not add power or “clean” the engine; it mainly resists knock, which most walk-behind mower engines do not require. For fuel and safety basics, follow the 917387500 owner's manual.
What to use (and what to avoid)
- Use: Fresh 87-octane unleaded gasoline
- Avoid: Old gas (from last season) because it can cause hard starting and rough running
- Avoid: Gasoline stored in a rusty or dirty can (rust and debris can plug the carburetor)
- Avoid: Overfilling or spilling fuel on hot engine parts; let the engine cool before refueling
Quick comparison: 87 vs 91 in a mower
| Fuel choice | What you get | Best use case |
|---|---|---|
| 87 octane (regular) | Correct performance for most mower engines | Everyday mowing |
| 91 octane (premium) | No added power in typical mower engines | Only if your engine label/manual specifically calls for it |
Fuel storage tips that prevent most “won’t start” problems
- Buy only what you will use in 30 days
- Store fuel in a clean, approved gas can; replace the can if it starts to rust
- Do not store gasoline from one season to the next
- If the mower will sit, run it dry or treat fuel per the manual’s storage guidance
Why it matters
Using the right fuel is less about octane and more about freshness and cleanliness. Stale gas and contamination are common causes of carburetor issues, hard starting, and poor engine performance.
Last updated: February 2026
What is the part number of the oil filter on a Craftsman 917387500?
The Craftsman mower model 917387500 uses a Briggs & Stratton 4-cycle engine (shown in the 12H802/12N802 engine parts listing), and this walk-behind mower setup typically does not use a spin-on oil filter. For the correct oil type, capacity, and maintenance steps, follow the 917387500 owner's manual.
How to confirm whether your engine has an oil filter
Most walk-behind mower engines in this size class are splash-lubricated and rely on regular oil changes instead of a replaceable filter. Use these checks:
- Look for a spin-on canister on the side of the engine block (similar to a small automotive filter)
- Check for oil filter threads or a filter mount near the crankcase
- Verify the engine model and type on the engine shroud label (Briggs & Stratton 12H802 or 12N802 are shown for this mower)
- Compare what you see to the engine diagrams in the 917387500 owner's manual
- If you find a filter installed, match it by engine model and type, not just the mower model
What to do instead: oil-change maintenance (typical)
If your engine has no oil filter, the best protection is clean oil on schedule.
| Maintenance item | Typical interval | What you do |
|---|---|---|
| Check oil level | Every use | Top off to the full mark |
| Change engine oil | Every 25-50 hours or each season | Drain and refill with fresh oil |
| Replace spark plug | Each season | Install the correct plug type |
| Clean/replace air filter | Each season (more in dust) | Restore airflow to prevent rich running |
For a convenient seasonal refresh, we often recommend using a tune-up kit when it matches your engine family, such as the briggs & statton tune-up kit 5140B.
Why it matters
Using the wrong oil filter (or assuming one exists) can lead to skipped maintenance. On a walk-behind mower like the Craftsman 917387500, regular oil changes are the main way to prevent accelerated engine wear, hard starting, and smoking.
Last updated: February 2026
What kind of engine is in the Craftsman 917387500?
The Craftsman gas walk-behind mower model 917387500 uses a Briggs & Stratton 4-cycle engine; the owner’s manual lists engine model numbers 12H802 and 12N802 (type 2639-B1) for this mower.
How to confirm the exact engine model on your mower
We recommend matching the engine ID on the blower housing or valve cover to what’s listed in the 917387500 owner’s manual.
- Look for a Briggs & Stratton label stamped or printed on the engine shroud
- Record the Model, Type, and Code numbers (Briggs uses all three)
- Compare the model number to 12H802 or 12N802
- If the label is dirty, wipe it clean and use a flashlight for the stamped digits
- Keep the numbers handy when ordering tune-up or ignition parts
What “4-cycle” means (and what fuel to use)
A 4-cycle (4-stroke) mower engine runs on straight gasoline in the fuel tank and uses separate engine oil in the crankcase (no gas-oil mixing).
| Engine style | Fuel in tank | Oil handling | Common mistake to avoid |
|---|---|---|---|
| 4-cycle (this mower) | Gasoline only | Oil added to crankcase | Mixing oil into the gas |
Why it matters
The engine model and type number determine the correct carburetor parts, air cleaner parts, spark plug, and governor or starter components. Using the exact Briggs & Stratton ID prevents ordering the wrong parts for your Craftsman 917387500.
Last updated: February 2026
What kind of oil does a Craftsman walk behind mower take?
For Craftsman model 917387500, the engine holds 20 oz of oil; use a quality small-engine oil and fill to the FULL line on the dipstick, checking the level before each use. For the exact type and grade, follow the Engine section in the 917387500 owner's manual.
Oil type and fill guidance
We recommend using the oil grade specified for your temperature range in the manual, then filling slowly and rechecking the dipstick.
- Start with about 16 oz, then top off to the FULL mark
- Keep the mower level while checking oil
- Let oil settle, then recheck the dipstick for an accurate reading
- Do not overfill; overfilling can cause smoking and hard starting
- Check oil before each use and add as needed
Capacity and maintenance schedule
The manual calls out a 20 oz capacity and routine oil checks; it also gives a standard change interval.
| Item | What to do | Typical timing |
|---|---|---|
| Oil capacity | Fill to FULL line on dipstick | 20 oz total capacity |
| Oil level checks | Check and top off | Before each use |
| Oil changes | Drain and refill | Every 25 hours or each season |
Quick oil change tips (safe DIY)
Before changing oil, we follow the safety steps in the manual.
- Run the engine briefly, then shut it off and let it cool slightly
- Disconnect the spark plug wire before tipping the mower
- Drain fuel first if the mower must be tipped for draining
- Drain into a suitable container, then refill to the FULL mark
Why it matters
Correct oil type and the proper 20 oz fill level protect the crankshaft, piston, and bearings from heat and wear; low oil is one of the fastest ways to damage a walk-behind mower engine.
Last updated: February 2026
What model number is a Craftsman 917387500 lawn mower?
The model number for a Craftsman 917387500 lawn mower is 917.387500 (often written without the dot as 917387500). You’ll find it on the model decal attached to the rear of the mower housing; our 917387500 owner's manual shows this model number on the cover page.
Where to find the model number on the mower
Look for a decal or label on the mower housing; on this Craftsman walk-behind mower it’s typically on the rear of the deck/housing.
- Check the rear of the mower housing (behind the engine area)
- Wipe off grass and dirt so the full number is readable
- Record both the model number and serial number for parts lookup
- Use the full model number when ordering parts like a blade, blade adapter, or control cable
Model number formats you may see
The same mower can show the model number with or without punctuation.
| How it may appear | What it means |
|---|---|
| 917.387500 | Standard label format |
| 917387500 | Same model number without the dot |
Why it matters
Using the exact model number ensures you get the correct diagrams, maintenance specs (oil type, spark plug gap, blade bolt torque), and the right replacement parts for your Craftsman gas walk-behind lawn mower.
Last updated: February 2026
What year is Craftsman Model 917387500?
Craftsman model 917387500 is identified by its model number, not a built-in “year.” For this mower, the 917387500 owner's manual confirms the model, but the manufacturing year is typically determined from the engine or product date code on the mower, not from “917” model numbering.
How to find the year on your mower
Use these common ID points on Craftsman walk-behind mowers:
- Check the engine data plate (often on the blower housing or valve cover) for a date code
- Look for a product label on the deck or rear housing with a serial or date code
- If the mower has a Briggs & Stratton engine, use the engine model-type-code to decode the build date
- Compare your mower’s configuration to the parts list in the manual to confirm you have the correct model family
What the manual tells you (and what it does not)
The manual is the best match tool for the mower’s model identification and parts breakdown.
| Item | What you can confirm | Where to look |
|---|---|---|
| Mower model | Model 917.387500 | Manual cover and parts diagrams |
| Manufacturing year | Not listed as a single “year” field | Engine tag or mower serial/date code label |
| Correct replacement parts | Yes, by diagram and key number | Manual parts list |
Why it matters
The correct year matters most when you are matching engine parts (carburetor, ignition, air filter) and some deck or handle hardware that can change across production runs. Using the model plus the engine code prevents ordering the wrong blade, cable, or fasteners.
Parts that are commonly affected by exact version
If you are ordering parts for this Craftsman mower, these are often version-sensitive:
- Walk-behind lawn mower engine cable 532176556 (zone control cable length and end fittings)
- Lawn mower blade 532406713 (deck size and blade center pattern)
- Rope guide 586122501 (handle style and routing)
Last updated: February 2026
