PowerSmart 21-Inch 140cc B&S Engine Self-Propelled Lawn Mower – 6-Position Adjustable Cutting Height, 3-in-1 Mulching, Side Discharge, and Rear Bagging, Easy Start

Name: PowerSmart 21-Inch 140cc B&S Engine Self-Propelled Lawn Mower – 6-Position Adjustable Cutting Height, 3-in-1 Mulching, Side Discharge, and Rear Bagging, Easy Start
Brand: PowerSmart
SKU: B8621S

When you purchase through links on our site, we may earn an affiliate commission.
PowerSmart | Gas Powered Self Propelled Lawn Mowers

AVERAGE

Winnowl Index

Winnowl Verdict

At an AVERAGE (74) Winnowl Index, the PowerSmart 21-Inch 140cc B&S Engine Self-Propelled Lawn Mower offers top-tier specs, but the lack of value at this price point makes it a difficult choice. You get Strong Performance with this unit, but it comes at the cost of Mediocre Value and only Average Brand Strength to back it up. The PowerSmart 21-Inch 140cc B&S Engine Self-Propelled Lawn Mower – 6-Position Adjustable Cutting Height, 3-in-1 Mulching, Side Discharge, and Rear Bagging, Easy Start offers a 3 Years Warranty that beats the average by 2% and means you should feel reasonably protected against common manufacturing defects during the first few years of ownership, yet the $425.44 price makes this a poor value for the Gas Powered Self Propelled Lawn Mowers category. We suggest checking out other Gas Powered Self Propelled Lawn Mowers in the class; paying a 15% premium for 12% less value doesn't make sense unless you can't find this level of performance in another product.

Market Value Index

Mediocre

$425.44

Overpriced Fair High Value

At $425.44, you are capturing 12% less Performance per dollar than the $371.29 average, confirming its Mediocre Value status.

Performance Rating

Strong

Strengths

Neutrals

Weaknesses

The Strong Performance measures 2% above the average; you can see this in the 3 Years Warranty which provides you should feel reasonably protected against common manufacturing defects during the first few years of ownership, even though the 140 cc Engine Displacement eventually leads to you will likely notice the engine struggling or "choking" when attempting to mulch thick grass or navigate uphill.

Brand Strength

Average

Trust

Reliability

Customer Service

The Average Brand Strength of PowerSmart is a combination of the Average Brand Trust and Average Brand Reliability.

Available At

$425.44 View Deal

The Winnowl Lab Report

Specification	Value	Rating	Vs. Average	Winnowl Insight
Engine Displacement	140 cc	Mediocre	12% worse	Entry-level displacement. Engines in this range (typically 140cc) lack the torque required for heavy-duty residential tasks.
Warranty	3 Years	Strong	41% better	Standard industry backing. This 2-year window is the baseline for most reputable residential gas mower brands.
Cutting Width	21 inches	Average	1% worse	Full-size residential benchmark. The 21-22 inch deck is the gold standard for balancing speed, storage, and handling.
Cutting Height Adjustment	6 settings	Average	3% worse	Standard residential precision. Provides enough versatility to handle everything from low spring cuts to tall summer maintenance.

Ranking Factors

Insights

Value Rank: #9 out of 15.
Performance Rank: #8 out of 15.
Winnowl Quadrant: Premium

Strengths

Highest Warranty in its class at 3 Years, significantly above the class average of 2.13 Years.

Neutral

A Cutting Width of inches is about average (21.30 inches) but narrower than the widest in class at 24 inches.
A Cutting Height Adjustment of settings is about average (6.20 settings) but not as many as the class max of 8 settings.

Weaknesses

Lowest Engine Displacement in its class at 140 cc, well below the class high at 201 cc.

Comparison

Name	Winnowl Index	Value	Performance	Brand	Price	Engine Displacement	Cutting Width	Warranty	Cutting Height Adjustment
PowerSmart 21-Inch 140cc B&S Engine Self-Propelled Lawn Mower	AVERAGE 74	Mediocre	Strong	Average	$425.44	140 cc	21 inches	3 Years	6 settings
BILT HARD 21 Inch Self Propelled Gas Lawn Mower	STRONG 84	Strong	Exceptional	Average	$379.99	201 cc	21 inches	2 Years	8 settings
YARDMAX 24 in. Gas Walk Behind Self Propelled Lawn Mower	AVERAGE 76	Weak	Exceptional	Average	$602.42	201 cc	24 inches	2 Years	6 settings
Self Propelled Gas Lawn Mower	ELITE 45	Exceptional	Strong	Zero	$199.97	141 cc	21 inches	2 Years	6 settings