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How many HP is a 150cc lawn mower?
A 150cc walk-behind mower engine typically falls in the 3 to 5 HP range, depending on the engine design and how the manufacturer measures power. For Craftsman model 917376150, use the engine identification and specs in the 917376150 owner's manual to match the correct engine and its published power rating.
What “150cc” means for horsepower
Displacement (cc) is engine size, not a direct horsepower rating. Two 150cc engines can produce different HP because of how they are built and tuned.
Key factors that change HP on 150cc-class engines:
- Governed RPM setting
- Torque curve and internal design
- Carburetor and muffler setup
- Air density (altitude, temperature)
- Cutting load (wet, tall, or thick grass)
How to estimate HP for your mower correctly
The most accurate way is to identify the engine model and then use the engine maker’s published rating method.
Use this checklist:
- Find the engine model/type/code on the engine shroud or valve cover
- Compare that information to the engine section in the 917376150 owner's manual
- Use the manufacturer’s power rating for that exact engine family
- If you are comparing mowers, compare torque and blade tip speed as well as HP
Quick comparison guide
| What you have | What it tells you | Best use |
|---|---|---|
| 150cc | Engine size | Rough comparison only |
| Engine model number | Exact engine family | Best for finding true rating |
| Torque rating | Pulling power under load | Best for real mowing performance |
Why it matters
HP numbers vary by rating standard, but cut quality usually depends more on blade condition, deck airflow, and engine tune than a small HP difference.
If performance feels weak, start with the basics:
- Replace a bent or worn blade (example: lawn mower blade 532406713)
- Clean/replace the air filter
- Use fresh fuel and the correct oil
- Keep the underside of the deck clean
Last updated: February 2026
How much oil does a Craftsman 6.75 lawn mower take?
For the Craftsman walk-behind mower model 917376150 (6.75 HP), the engine oil capacity is 20 ounces. Add oil slowly and stop at the FULL mark on the dipstick to avoid overfilling.
What oil to use (recommended)
We follow the oil guidance in the 917376150 owner's manual. Use a high-quality detergent oil rated API SG to SL, and choose viscosity by temperature:
- SAE 30 for temperatures above 32°F
- SAE 5W-30 for temperatures below 32°F
- Check oil level on the dipstick frequently while filling
- Retighten the dipstick after filling before starting
How to fill to the correct level
To prevent smoking and hard starting, we fill in small steps and verify the level often.
- Park the mower on a level surface
- Remove the dipstick and insert a clean funnel
- Pour a few ounces, then check the dipstick
- Repeat until oil settles at FULL
- Wipe up any spilled oil on the deck or engine
Quick fill checklist
| Step | What to do | What you are checking |
|---|---|---|
| 1 | Add a few ounces | Oil begins to register on dipstick |
| 2 | Pause 30 to 60 seconds | Oil settles in crankcase |
| 3 | Recheck dipstick | Stop at the FULL mark |
Why it matters
Running low oil can damage the engine quickly; overfilling can cause heavy exhaust smoke and poor performance. Filling to the dipstick FULL mark protects the engine and keeps your Craftsman mower running smoothly.
Last updated: February 2026
What does 150 cc mean on a lawn mower?
On a Craftsman walk-behind mower like model 917376150, 150 cc refers to the engine’s displacement (the total volume of the cylinder). In general, higher cc means the engine can produce more torque for thicker grass, hills, and bagging, assuming the mower is in good tune.
What “cc” tells you (and what it does not)
Engine displacement is measured in cubic centimeters (cc). It is a quick way to compare engine size, but it is not the only factor that affects cutting performance.
- More cc usually means more low-end pulling power (helpful in tall or wet grass)
- It does not guarantee a better cut if the blade is dull or the deck is packed with clippings
- It does not equal horsepower directly; engine design and RPM matter
- It does not change fuel type; you still follow the fuel and oil specs in the manual
Typical cc ranges for walk-behind mowers
These ranges help put “150 cc” in context for gas push and self-propelled mowers.
| Engine size | Typical use case | What you’ll notice |
|---|---|---|
| 125 to 140 cc | Smaller yards, lighter loads | May slow in heavy grass |
| 140 to 160 cc | Most average lawns | Balanced power and fuel use |
| 160 to 190+ cc | Heavy grass, hills, frequent bagging | Stronger pull, often heavier mower |
Why it matters for your 917376150
A 150 cc-class mower is commonly chosen because it has enough torque for routine mowing without being overly heavy. To get the most from that engine size, we focus on the basics that actually control cut quality and load.
- Use fresh unleaded regular gasoline (the manual lists 1.6 quarts capacity)
- Use the correct oil viscosity for temperature (SAE 30 above 32°F; SAE 5W-30 below 32°F)
- Keep the blade sharp and installed correctly; a worn blade increases engine load
- If the mower struggles to move, clean the drive wheel area and gears regularly
Helpful references
- For fuel, oil, and maintenance specs, use the 917376150 owner’s manual.
- For blade maintenance tips, see how to sharpen a lawn mower blade.
Last updated: February 2026
What model number is the Craftsman 917376150 riding mower?
The Craftsman 917376150 is not a riding mower model number; it identifies a Craftsman rotary walk-behind lawn mower (22-inch, power-propelled). For model 917376150, use the model number exactly as printed on the mower’s rear housing decal and in the 917376150 owner's manual.
Quick clarification (walk-behind vs. riding)
Model numbers can look similar across Craftsman products, so it helps to match the number to the machine type.
- 917376150: walk-behind rotary mower (push mower)
- Riding mowers: typically have a seat, steering wheel, and mower deck under the frame
- Walk-behind mowers: have a handlebar, and you walk behind the deck
- The correct model number is the one on the rear of the mower housing decal
Where to find the model number on this mower
On Craftsman walk-behind mowers like model 917376150, the model and serial label is on the rear of the mower housing.
- Shut the engine off and let it cool.
- Stand behind the mower at the handle.
- Look at the rear metal deck/housing for the decal.
- Record both the model and serial numbers for parts lookup.
Why the “riding mower” answer you saw is misleading
The phrase “riding mower” conflicts with the official documentation for 917376150, which calls it a rotary lawn mower (walk-behind). Using the wrong equipment type can lead to ordering the wrong blade, belt, or drive parts.
Common parts that differ by mower type
| Item | Walk-behind mower | Riding mower |
|---|---|---|
| Blade | Single 21 to 22-inch blade | Multiple deck blades |
| Drive system | Ground drive belt and wheels | Deck belt(s), transmission, pulleys |
| Controls | Handle and control bar | Steering and pedal/levers |
Parts tip for model 917376150
If you are shopping parts for this walk-behind mower, match by model number and part ID. For example, the correct 22-inch blade shown in the parts list is the lawn mower blade 532406713.
Last updated: February 2026
