Shulemin
Shulemin 20-Inch Self-Propelled Gas Mower: 173cc Engine for Hills & Thick Grass
The Shulemin 20-Inch Self-Propelled Gas Lawn Mower pairs a 173cc engine with a wide 27-inch steel deck and rear-wheel drive to tackle hills, thick grass, and uneven terrain with authority. The 3-in-1 discharge system (mulch, side, rear bag) and 60L grass bag give you flexibility for any mowing style.
It's best suited for medium-to-large yards where the wide cut and self-propelled drive meaningfully reduce time and effort.
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Last updated: . Based on our analysis of 364 lawn mowers.
What Sets It Apart
Key specification highlights based on our analysis.
27-Inch Cutting Deck
Wide cutting path reduces passes (walk-behind avg: 18.0 in)
Steel Cutting Deck
Durable steel deck for long-term use
3-in-1 Discharge
Mulch, side discharge, and rear bag (59 of 364 mowers have all three)
Rear-Wheel Drive
Better traction on hills and slopes vs front-wheel drive
Why We Recommend It
- 01.
27-inch wide cutting deck slashes mowing time on medium-to-large yards , far above the 18-inch walk-behind average
- 02.
173cc DV173-class engine generates enough RPM and torque to power through thick grass, dense weeds, and light shrubs without bogging
- 03.
Rear-wheel drive self-propulsion conquers slopes and uneven yards where front-wheel drive mowers lose grip
- 04.
3-in-1 discharge (mulch, side discharge, rear bag) offers full flexibility , a feature found in only 59 of 364 mowers in this category
- 05.
60L jumbo bag capacity means fewer stops to empty, keeping mowing sessions efficient on larger properties
Considerations
- 01.
27-inch deck is oversized for small yards under 1/4 acre , maneuverability in tight spaces and around obstacles is reduced
- 02.
Gas-powered operation means ongoing fuel investment, emissions, and periodic maintenance (oil changes, spark plug, air filter)
- 03.
Cutting height range of 1-3 inches is on the lower end , users who prefer a taller cut above 3 inches will find options limited
Technical Specifications
| Feature | Specification |
|---|---|
| Mower Type | Self propelled |
| Power Source | Gas |
| Cutting Width | 27" |
| Deck Material | Steel |
| Blade Type | Rotary |
| Cutting Height | 1" – 3" |
| Height Positions | 7 |
| Engine | 173cc |
| Drive | Rear wheel |
| Discharge | 3-in-1 (Mulch, Side, Bag) |
| Foldable Handle | Yes |
| Start Type | Push button |
Power & Performance
The 173cc engine delivers robust torque at operating RPM, giving this mower the muscle to self-propel through thick grass, dense weeds, and areas encroached by shrubs or light brambles without the power drop you'd see from smaller 140cc or 150cc engines. This power level is well-matched to the wide 27-inch deck, ensuring the blade maintains cutting speed even under load.
For overgrown or neglected yards, the engine's displacement is a meaningful advantage over entry-level gas mowers.
Cutting System
The 27-inch steel cutting deck is a standout feature , it's roughly 50% wider than the 18-inch average among walk-behind mowers, which directly reduces the number of passes required per mowing session. The rotary blade configuration handles a variety of grass types, and with 7 cutting height positions ranging from 1 to 3 inches, you have fine-grained control over lawn height.
The 3-in-1 discharge system allows you to mulch clippings back into the turf, collect them in the 60L rear bag, or side-discharge for fast cleanup on large open sections.
Drive & Handling
Rear-wheel drive self-propulsion is the right choice for hilly and uneven terrain , it keeps traction under the drive wheels even when the front lifts slightly on inclines, helping you conquer slopes that would cause a front-wheel drive mower to slip. The foldable handle reduces the storage footprint when the season ends.
Weight typical of a 173cc gas self-propelled mower means this isn't the lightest machine, but the self-propelled system offsets push fatigue on longer mowing sessions across large properties.
Battery / Fuel
As a gas-powered mower, runtime is effectively unlimited as long as you have fuel , making it practical for large yards where a battery mower might require mid-session recharging. The 173cc engine will require standard gas-powered maintenance: oil changes at least once per season, air filter inspection, spark plug replacement every 25-50 hours, and proper fuel storage or stabilizer use for winter.
Fuel costs are ongoing but predictable, and the engine's power-on-demand nature means no waiting for a charge before mowing.
Who Is This Mower For?
Ideal For
- ✓ Homeowners with 1/2 acre to 1+ acre yards who want fewer mowing passes thanks to the 27-inch deck
- ✓ Properties with hills, slopes, or uneven terrain where rear-wheel drive traction makes a real difference over front-wheel drive mowers
- ✓ Yards with thick grass, stubborn weeds, or overgrown patches that demand a capable 173cc engine rather than a lighter electric motor
- ✓ Users who want mowing flexibility , mulching clippings back into the lawn, bagging with the 60L jumbo bag, or side-discharging on open areas
Not Ideal For
- ✕ Small yards under 1/4 acre where the 27-inch deck is overkill and reduces agility around landscaping and tight corners
- ✕ Eco-conscious users or those in areas with emissions restrictions , this is a gas-powered engine that requires fuel and produces exhaust
- ✕ Low-maintenance buyers who want to avoid engine upkeep , gas mowers require seasonal oil changes, air filter replacements, and fuel system care
Assembly is required out of the box, which is standard for this class of walk-behind mower. Most users can expect to attach the handle, connect the drive cable, and install the grass bag without specialized tools.
Before first use, check and top off the engine oil , some units ship without oil pre-filled, and running the engine dry will cause immediate damage
Test the self-propel drive cable tension adjustment after assembly to ensure smooth engagement on both flat ground and hills
Warranty details for the Shulemin mower are not confirmed in available product data , verify current warranty terms directly with the manufacturer or seller before purchasing, as coverage for engine components and the cutting deck can vary significantly between brands.
FAQ
Is the 173cc engine powerful enough for thick, overgrown grass?
Yes , the 173cc engine produces enough torque at operating RPM to push through thick grass, dense weeds, and areas with light shrubs or brambles without stalling. It's meaningfully more capable than entry-level 140cc engines on neglected or heavily grown lawns.
For extremely overgrown areas, making a second pass or raising the cut height for the first pass is still recommended.
How does rear-wheel drive help on hills compared to front-wheel drive?
Rear-wheel drive keeps the driven wheels under the heaviest part of the mower (the engine), maintaining traction even on inclines where the front wheels may lift slightly. Front-wheel drive mowers tend to lose grip on slopes because the drive wheels become unweighted going uphill.
For yards with hills or uneven terrain, rear-wheel drive provides noticeably better control and requires less effort from the operator.
How wide is the cutting deck and how much does it reduce mowing time?
The cutting deck is 27 inches wide, compared to the 18-inch average for walk-behind mowers , that's 50% more coverage per pass. On a 1/2 acre yard, this can reduce the total number of passes by roughly one-third, saving significant time each session.
The trade-off is reduced maneuverability in tight spaces, so it's best suited for open lawns with fewer obstacles.
How large is the grass bag and how often will I need to empty it?
The rear grass bag holds 60 liters, which is on the larger end for self-propelled gas mowers and is marketed as a 60L jumbo bag specifically to mow longer before stopping. Frequency of emptying depends on grass height and density , freshly cut dry grass fills a bag more slowly than wet or tall clippings.
On a well-maintained lawn, most users can complete a substantial portion of a medium-to-large yard before needing to empty.
Can this mower mulch clippings, or is it bag-only?
This mower supports 3-in-1 discharge: mulching, side discharge, and rear bagging. Mulching mode recirculates and finely cuts clippings back into the turf, returning nutrients to the soil and eliminating bag emptying.
Side discharge is best for fast mowing of open areas or when grass is too tall to bag efficiently. All three options are available, which is a feature found in fewer than 20% of mowers in this class.
What maintenance does a 173cc gas engine require?
Gas engines require more ongoing upkeep than battery-powered mowers: oil should be changed at least once per season or every 25-50 hours of use, the air filter needs inspection and periodic replacement, and the spark plug should be replaced annually. Before winter storage, use a fuel stabilizer or drain the tank to prevent fuel degradation.
These tasks take under an hour per season but are necessary to keep the engine running reliably year over year.
Bottom Line
The Shulemin 173cc self-propelled gas mower is a capable, wide-cutting machine built for medium-to-large yards with hills, thick grass, or uneven terrain. The 27-inch deck, rear-wheel drive, and 60L jumbo bag are a genuinely useful combination that reduces mowing time and effort on bigger properties.
Buyers with small yards, a preference for low-maintenance electric mowers, or tight budgets for ongoing fuel and upkeep should look elsewhere.
Best for medium-to-large yards with hills or thick grass where a wide-cut, rear-wheel-drive gas mower will save real time and effort.
Consider alternatives if you have a small or obstacle-heavy yard, want zero-emissions operation, or prefer to avoid gas engine maintenance.
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