Choosing the right lawn mower engine can make a significant difference in cutting efficiency and overall yard maintenance. The 170cc gas engine is widely favored for medium to large lawns, offering a strong balance of power, reliability, and ease of use.
This guide covers performance benefits, upkeep tips, suitable terrains, comparisons with other engine sizes, and the top 170cc mowers on the market.
What Are the Advantages of a 170cc Engine in Lawn Mowers?
When shopping for a new gas lawn mower, one of the most important specifications you’ll encounter is the engine size, measured in cubic centimeters (cc). Among the many options, the 170cc engine has become a popular choice for homeowners who want a strong balance of power, efficiency, and versatility.
A 170cc mower engine typically sits in the sweet spot between lighter-duty 140–150cc models and heavy-duty 190–200cc machines. This makes it an excellent option for medium to large lawns, as well as for users who need extra cutting strength without jumping into professional-grade equipment.
How Does a 170cc Engine Improve Mowing Performance?
The heart of any gas mower is its engine, and a 170cc engine delivers noticeable improvements in performance compared to smaller engines. Here’s how:
1. Better Cutting Power
With more displacement, a 170cc engine provides higher torque. This means the mower blade can maintain speed even when cutting through thick, tall, or damp grass. Smaller engines may bog down, leaving uneven cuts, while a 170cc engine keeps a consistent blade rotation.
2. Wider Deck Compatibility
Mowers with 170cc engines often feature 21–22-inch cutting decks. This allows you to cover more ground per pass, reducing mowing time. Smaller engines usually pair with 16–19-inch decks, which are better for small yards but slower for medium to large ones.
3. Improved Bagging and Mulching
A stronger engine improves airflow under the deck, which directly enhances mulching performance and ensures bagging systems fill evenly without clogs.
4. Longer Runtime Without Strain
Unlike electric or smaller engines, a 170cc motor doesn’t overwork easily. You can mow larger lawns in one session without stopping to let the engine rest.
What Are the Maintenance Tips for 170cc Gas Lawn Mowers?
While 170cc engines are reliable, they still need regular upkeep. Following these maintenance tips can extend the life of your mower significantly:
Oil Changes – Change engine oil every 25–50 hours of operation or at least once a season. Use SAE 30 or 10W-30 oil, depending on climate.
Air Filter Cleaning – Clean or replace the air filter every 25 hours of use. Dust and debris reduce airflow and efficiency.
Spark Plug Replacement – Inspect the spark plug annually and replace it every 1–2 seasons for smooth starting.
Blade Sharpening – Keep mower blades sharp; dull blades strain the engine and reduce cut quality.
Fuel Care – Use fresh gasoline and consider adding a fuel stabilizer if storing for winter. Old fuel leads to carburetor issues.
Deck Cleaning – Wash grass clippings from under the deck after each mow to maintain airflow and prevent rust.
Following these steps ensures your 170cc mower delivers peak performance for years.
Which Terrains Are Best Suited for 170cc Engine Mowers?
A 170cc mower offers versatility across a range of yard conditions:
Flat to Slightly Sloped Lawns – Handles effortlessly with smooth pushing or self-propulsion.
Medium to Large Yards (¼ – ½ acre+) – With wider decks and strong power, it’s ideal for larger residential lawns.
Thick Grass & Weeds – Cuts through dense or slightly overgrown patches without stalling.
Uneven Terrain – With self-propelled models, a 170cc engine has enough torque to push through bumpy ground.
However, if you have extremely hilly properties or commercial-sized lots, you may want to step up to a 190cc+ mower or even a riding mower for efficiency.
How Does a 170cc Engine Compare to Higher or Lower CC Models?
Engine size plays a direct role in power, efficiency, and suitability. Let’s compare:
170cc vs 140–150cc Engines
140–150cc: Best for small yards, light-duty mowing, and thinner grass.
170cc: Offers more torque for thicker lawns, larger yards, and consistent mulching.
Verdict: A 170cc is more versatile and reduces mowing time significantly.
170cc vs 190–200cc Engines
190–200cc: More powerful, ideal for heavy-duty mowing, commercial use, and steep hills.
170cc: Still strong but lighter and usually more fuel-efficient.
Verdict: Unless you have extremely demanding terrain, a 170cc strikes the best balance.
What Are the Best 170cc Lawn Mowers for Medium to Large Lawns?
Several reliable models feature 170cc engines, and they stand out for different needs:
1. Honda HRN216VKA 21-Inch Self-Propelled Gas Mower
Engine: 170cc Honda GCV170
Deck: 21-inch steel
Features: Variable speed self-propel, dual-lever height adjustment, excellent mulching.
Best For: Homeowners who want a premium, long-lasting mower with outstanding cutting performance.
2. Craftsman M215 21-Inch Self-Propelled Gas Mower
Engine: 170cc OHV engine
Deck: 21-inch with 3-in-1 capability (mulch, bag, side discharge)
Features: Front-wheel drive, dual-height adjustment, durable wheels.
Best For: Medium to large lawns with mixed grass density.
3. PowerSmart DB8621CR 21-Inch Push Lawn Mower
Engine: 170cc OHV
Deck: 21-inch
Features: Compact, lightweight for its size, 3-in-1 design.
Best For: Budget-friendly option for medium lawns without self-propelled drive.
4. Troy-Bilt TB170 XP 21-Inch Self-Propelled Mower
Engine: 170cc Troy-Bilt OHV
Deck: 21-inch steel
Features: XP performance, variable-speed drive, adjustable cutting heights.
Best For: Larger lawns where durability and efficiency are essential.
Alternatives of top 170cc mowers
| Model | Engine | Deck Size | Drive Type | Best For | Price |
|---|---|---|---|---|---|
| Honda HRN216VKA | 170cc Honda GCV170 | 21-inch | Self-Propelled | Premium performance, medium/large lawns | Check Price on Amazon |
| Craftsman M215 | 170cc OHV | 21-inch | Front-Wheel Drive | Affordable self-propelled for bigger yards | Check Price on Amazon |
| PowerSmart DB8621CR | 170cc OHV | 21-inch | Push | Budget-friendly, smaller lawns | Check Price on Amazon |
| Troy-Bilt TB170 XP | 170cc Troy-Bilt OHV | 21-inch | Self-Propelled | Durable, large and tough terrain | Check Price on Amazon |
What Are the Best 170cc Lawn Mowers for Medium to Large Lawns?
Several reliable models feature 170cc engines, and they stand out for different needs:
1. Honda HRN216VKA 21-Inch Self-Propelled Gas Mower
Engine: 170cc Honda GCV170
Deck: 21-inch steel
Features: Variable speed self-propel, dual-lever height adjustment, excellent mulching.
Best For: Homeowners who want a premium, long-lasting mower with outstanding cutting performance.
2. Craftsman M215 21-Inch Self-Propelled Gas Mower
Engine: 170cc OHV engine
Deck: 21-inch with 3-in-1 capability (mulch, bag, side discharge)
Features: Front-wheel drive, dual-height adjustment, durable wheels.
Best For: Medium to large lawns with mixed grass density.
3. PowerSmart DB8621CR 21-Inch Push Lawn Mower
Engine: 170cc OHV
Deck: 21-inch
Features: Compact, lightweight for its size, 3-in-1 design.
Best For: Budget-friendly option for medium lawns without self-propelled drive.
4. Troy-Bilt TB170 XP 21-Inch Self-Propelled Mower
Engine: 170cc Troy-Bilt OHV
Deck: 21-inch steel
Features: XP performance, variable-speed drive, adjustable cutting heights.
Best For: Larger lawns where durability and efficiency are essential.
Final Thoughts
A 170cc lawn mower engine hits the sweet spot between smaller residential mowers and heavy-duty commercial units. It provides the power needed to tackle thick grass, uneven terrain, and medium-to-large lawns, while still being more fuel-efficient and affordable than 190–200cc machines.
If you’re upgrading from a smaller push mower or need something with more consistent performance without jumping into a riding mower, a 170cc mower is an excellent choice. Models like the Honda HRN216VKA and Craftsman M215 are great investments that combine cutting power, durability, and ease of use.
With proper maintenance, these engines deliver years of reliable service and help keep your lawn looking sharp with minimal effort.
How many cc is good for a lawn mower?
140cc to 190cc is generally good for most lawn mowers.
What does 170cc mean on a lawn mower?
It means the engine’s displacement is 170 cubic centimetres, showing its power capacity.
What is a good engine size for a lawn mower?
An engine between 140cc and 190cc is considered a good size for residential mowing.
Is 190cc good for a push mower?
Yes, 190cc is powerful for a push mower and handles thick or tall grass easily.
