Mowing a large yard with a push mower can be exhausting, especially on slopes or thick grass. If you’re ready to upgrade to a self-propelled model, the BILT HARD 21 self propelled lawn mower review is a great starting point. In this guide, we’ll break down the top self-propelled mowers, including gas and electric options, to help you find the perfect fit for your lawn.
We’ve evaluated seven popular models from BILT HARD, Greenworks, and PowerSmart, focusing on power, ease of use, cutting versatility, and value. Whether you prioritize eco-friendly battery power or raw gas torque, we’ve got you covered. For more compact lawn solutions, check out our best small lawn mower for small yard guide.
Pros
- Powerful brushless motor provides reliable, efficient performance
- Self-propelled rear-wheel drive handles slopes and thick grass with ease
- Quiet operation and zero emissions make it eco-friendly and neighbor-friendly
- LED headlight extends mowing hours into early morning or evening
- 4-in-1 functionality adapts to different mowing and leaf management needs
Cons
- Heavy weight (65 lbs) may be challenging to maneuver in tight spaces or on uneven terrain
- Battery runtime may vary significantly based on grass thickness and mowing technique
- No reviews yet to confirm real-world long-term durability and performance
The Greenworks 60V 21in Self-Propelled Lawn Mower is a battery-powered mower designed for homeowners with medium to large yards up to 3/4 acre. It combines the power of a gas mower with the convenience and eco-friendliness of electric operation. This model is ideal for those seeking a quiet, low-maintenance alternative to traditional gas mowers without sacrificing cutting performance.
Standout features include the 60V brushless motor and dual 4.0Ah batteries, which deliver consistent power for mowing, mulching, and bagging. The self-propelled rear-wheel drive system offers on-the-go speed control, making it easy to tackle slopes and thick grass. Users will appreciate the 4-in-1 versatility, allowing them to mulch, bag, side discharge, or use turbo leaf pickup for year-round yard maintenance.
Design and build quality are solid, with a durable 21-inch steel deck and an integrated LED headlight for mowing in low light. The mower weighs 65 pounds, which is typical for this class, and the foldable handle aids storage. The 4-year warranty adds peace of mind, and compatibility with over 75 Greenworks 60V tools allows for a unified cordless system.
Potential drawbacks include the mower's weight, which may be cumbersome in tight spaces or on uneven ground. Battery runtime can vary based on grass conditions and mowing technique, so users with very thick or wet grass may need to manage battery usage carefully. As a new model, there are no user reviews yet to validate long-term reliability.
Overall, the Greenworks 60V 21in Self-Propelled Lawn Mower is a compelling choice for eco-conscious homeowners who want gas-like power without the noise, fumes, and maintenance. Its combination of performance, versatility, and warranty makes it a strong contender in the cordless mower market.
Buying Guide: What to Look for in a Self-Propelled Mower
Power Source: Gas vs. Battery
Your first decision is between gas and battery power. Gas mowers like the BILT HARD 21 self propelled gas mower offer unlimited runtime and strong torque, ideal for large or dense lawns. Battery models, such as the Greenworks 80V and 60V, provide quiet operation, zero emissions, and instant start, but runtime is limited by battery capacity.
Consider your yard size and tolerance for maintenance. Gas engines require oil changes and fuel, while battery mowers need charging time. For budget-conscious buyers, our best small lawn mowers on a budget list offers affordable options.
Cutting Width and Deck Material
A 21-inch cutting deck is the sweet spot for most residential yards, balancing maneuverability and efficiency. Steel decks, like those on BILT HARD and PowerSmart models, are durable and resist rust. Some mowers offer a 20-inch deck, which is lighter and easier to store.
Wider decks mean fewer passes, saving you time. However, if you have tight corners or a small yard, a 20-inch may be easier to handle. Always check the deck material for longevity.
Self-Propelled Drive and Speed Control
Rear-wheel drive provides better traction on slopes, while front-wheel drive is lighter and more maneuverable on flat ground. Variable speed control, like on the Greenworks models, lets you adjust your pace to match conditions. Single-speed systems, like on the BILT HARD 21, are simpler but less customizable.
If your lawn has hills, prioritize rear-wheel drive with good traction. For flat yards, any drive type works. Also, consider the handle design for comfort during long mowing sessions.
Cutting Height Adjustments and Versatility
Look for multiple cutting height positions to adapt to seasonal grass growth. Single-lever adjustments, like those on BILT HARD models, make it easy to change height across all four wheels. 3-in-1 mowers offer bagging, mulching, and side discharge for year-round lawn care.
A wider range of heights, from 1 inch to 3.75 inches, gives you more flexibility. For tips on maintaining your mower blades, see our guide on how to sharpen lawn mower blades.
Final Thoughts
After reviewing the top self-propelled mowers, our overall recommendation splits between two standouts. For those who want the power and freedom of gas without the push, the BILT HARD 21″ Self Propelled Gas Lawn Mower offers a robust 201cc engine, 3-in-1 versatility, and easy start at a great value. If you prefer a cleaner, quieter ride, the Greenworks 80V 21in Self-Propelled Lawn Mower delivers impressive battery performance, variable speed, and LED lights for early or late mowing. Whichever you choose, you’ll enjoy a healthier, better-manicured lawn with less effort.
Frequently Asked Questions
What is the difference between BILT HARD 20 inch and 21 inch gas mowers?
The BILT HARD gas mower 20 inch is a push mower with a 144cc engine and 8 cutting heights, while the BILT HARD 21 inch self propelled model features a 201cc engine, rear-wheel drive, and 8 heights. The 21 inch also offers a wider cutting path and more torque for tougher grass.
How do I start a BILT HARD lawn mower?
BILT HARD gas mowers feature an auto choke system, so you don’t need to prime or manually choke. Simply pull the recoil cord gently to start the engine. Always ensure the fuel tank has fresh gas and the oil level is correct before starting.
Can I use a battery-powered mower for a large yard?
Yes, modern battery mowers like the Greenworks 60V with two 4.0Ah batteries can handle up to 3/4 acre per charge, depending on conditions. For larger yards, consider the 80V model or keep a spare battery. For more insights, check out our greenworks battery review.
What is the best self-propelled mower for slopes?
For slopes, rear-wheel drive mowers like the BILT HARD 21 self propelled and the PowerSmart 21-inch offer better traction and control. Look for models with variable speed to adjust your pace safely on inclines.
