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420cc engine

Skip it

Weak search conversion (0.7%) — this niche doesn't clear our bar today.

Market size 28Growth 30Conversion 8Competition 60Returns 87Price range 22Avg price 47Brand share 72Review moat 99Quality gap 35

Review moat

Incredible26.59

avg incumbent reviews — the moat a new listing must climb

Returns

Great1.4%

return rate — above 5% kills the launch gate

Brand share

Good62%

top-5 brand share — brands hold most of the demand

Competition

Good49%

top-5 click share — leaders hold, buyers still browse

Avg price

Okay$193.55

avg listing price — sweet spot $15–$100

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+4.2%

90-day search growth — must beat 0% to launch

Market size

Okay$122K

$122K/yr · 97K searches

Price range

Bad$24.41–$374.76

cheapest to priciest tracked listing — scored on the share inside $15–$100

Conversion

Bad0.7%

search→purchase rate — share of searches ending in a sale

Signals No Dominant Brand Low Review Barrier High Price

According to Flapen's Amazon United States niche tracking, 420cc engine is a $122K/yr Amazon United States market (97K searches/yr). The top 5 brands hold 62% of demand. Verdict: Skip it — 46/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

420cc engine market data

Units sold / yr
250–500
avg 0–100/product
Revenue / yr
$48K–$97K
units × avg price
Conversion rate
0.7%
Avg BSR
#2,011
Page quality
0%
Prime
11%
Sponsored
93%
Out of stock
10.1%
Avg brand age
29 months
Avg seller age
194 days

Competition & brand share

The top 5 products take 49% of clicks — established leaders, but buyers still shop beyond them.

Brands

21 falling

Sellers

24

Top-5 brand share

62%

Top 20: 99%

Top-5 click share

49%

Top 20: 93%

Open market

32%

  • BILT HARD18%
  • Genkins17%
  • NKLOKSD11%
  • JAYGOVAN8%
  • Mahugde7%
  • GENMAX6%

Top 420cc engine search terms

  • 420cc engine37K/yr
  • 420 cc engine8K/yr
  • 15 hp engine8K/yr
  • 420cc predator engine9K/yr
  • 15hp engine8K/yr
  • 420cc6K/yr
  • 13 hp engine5K/yr
  • 420cc engine electric start4K/yr
  • 13hp engine4K/yr
  • predator 420 engine3K/yr
All search terms

Top 420cc engine products on Amazon

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%5%$6K10%$12K15%$18K20%$24K1101001K Reviews — right = deep review moat Market share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)5 products missing review or click data not plotted

All 24 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share
1
BILT HARD 420cc 15HP Gas Engine with Electric Start Horizontal Shaft 4 Stroke OHV Gas Motor Gas Powered Multi-Use Engine

BILT HARD 420cc 15HP Gas Engine with Electric Start Horizontal Shaft 4 Stroke OHV Gas Motor Gas Powered Multi-Use Engine

BILT HARD$347.404.3★122 rev

2
Genkins 15 HP 420cc Recoil Start Engine Gas Powered Multi-Use Engine GK420

Genkins 15 HP 420cc Recoil Start Engine Gas Powered Multi-Use Engine GK420

Genkins$202.694.1★28 rev

3
NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD$136.895.0★1 rev

4
Genkins 15 HP 420cc Electric Start Engine Gas Powered Multi-Use Engine GK420E

Genkins 15 HP 420cc Electric Start Engine Gas Powered Multi-Use Engine GK420E

Genkins$303.394.5★41 rev

5
GENMAX 15HP 420cc Electric Start Gas Engine Horizontal Shaft 1 4-Stroke OHV Replacement Engine for Log Splitter Generator Pressure WasherGM420E

GENMAX 15HP 420cc Electric Start Gas Engine Horizontal Shaft 1 4-Stroke OHV Replacement Engine for Log Splitter Generator Pressure WasherGM420E

GENMAX$336.695.0★2 rev

Newest

by launch date
420CC Engine 15HP 4 Stroke OHV Horizontal Shaft Single Cylinder Gas Engine 9.7KW 3600RPM Recoil Start Go Kart Motor with Pull Handle & Silencer for Compressor Lawnmower Garden Tool Motor

420CC Engine 15HP 4 Stroke OHV Horizontal Shaft Single Cylinder Gas Engine 9.7KW 3600RPM Recoil Start Go Kart Motor with Pull Handle & Silencer for Compressor Lawnmower Garden Tool Motor

Mahugde$112.720 rev

2mo ago
Serendicy 4-Stroke Gas Engine 420CC 15HP Go Kart Engine Air Cooled Start Gas Powered Engine Fits for Lawn Mower Water Pumps Vibrators Generators 3600RPM

Serendicy 4-Stroke Gas Engine 420CC 15HP Go Kart Engine Air Cooled Start Gas Powered Engine Fits for Lawn Mower Water Pumps Vibrators Generators 3600RPM

Serendicy$117.100 rev

2mo ago
Omosiroi 420CC Engine 15 HP Go Kart Engine 4 Stroke Gas Engine with 1.72gal Fuel Tank 9700W Pull Start Motor for Go Kart Pressure Washer Log Splitter for Go Kart Compressors Trencher Lawn Mover

Omosiroi 420CC Engine 15 HP Go Kart Engine 4 Stroke Gas Engine with 1.72gal Fuel Tank 9700W Pull Start Motor for Go Kart Pressure Washer Log Splitter for Go Kart Compressors Trencher Lawn Mover

Omosiroi$180.821 rev

3mo ago
BTGSHYNM 420cc 15 HP Gas Engine 4 Stroke OHV Industrial Grade Replacement Gas Motor 9kw/3600r/min Single Cylinder Air Cooled Gasoline Engine Gasoline OHV Motor with Manual Recoil Starter

BTGSHYNM 420cc 15 HP Gas Engine 4 Stroke OHV Industrial Grade Replacement Gas Motor 9kw/3600r/min Single Cylinder Air Cooled Gasoline Engine Gasoline OHV Motor with Manual Recoil Starter

BTGSHYNM$148.550 rev

3mo ago
NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD$136.891 rev

3mo ago

Trending

90-day click momentum
Omosiroi 420CC Engine 15 HP Go Kart Engine 4 Stroke Gas Engine with 1.72gal Fuel Tank 9700W Pull Start Motor for Go Kart Pressure Washer Log Splitter for Go Kart Compressors Trencher Lawn Mover

Omosiroi 420CC Engine 15 HP Go Kart Engine 4 Stroke Gas Engine with 1.72gal Fuel Tank 9700W Pull Start Motor for Go Kart Pressure Washer Log Splitter for Go Kart Compressors Trencher Lawn Mover

Omosiroi$180.825.0★

▲ 200%
420CC Engine 15HP 4 Stroke OHV Horizontal Shaft Single Cylinder Gas Engine 9.7KW 3600RPM Recoil Start Go Kart Motor with Pull Handle & Silencer for Compressor Lawnmower Garden Tool Motor

420CC Engine 15HP 4 Stroke OHV Horizontal Shaft Single Cylinder Gas Engine 9.7KW 3600RPM Recoil Start Go Kart Motor with Pull Handle & Silencer for Compressor Lawnmower Garden Tool Motor

Mahugde$112.720.0★

▲ 198%
NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Black)

NKLOKSD$136.895.0★

▲ 198%
GENMAX 15HP 420cc Electric Start Gas Engine Horizontal Shaft 1 4-Stroke OHV Replacement Engine for Log Splitter Generator Pressure WasherGM420E

GENMAX 15HP 420cc Electric Start Gas Engine Horizontal Shaft 1 4-Stroke OHV Replacement Engine for Log Splitter Generator Pressure WasherGM420E

GENMAX$336.695.0★

▲ 197%
NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Red)

NKLOKSD 420CC 15HP Gas Engine 4-Stroke OHV Horizontal Shaft Gas Powered Engine Shaft 1 (25mm) Diameter Air Cooling Go Kart Engine Recoil Start Go Cart Motor for Log Splitters Lawn Mowers (Red)

NKLOKSD$150.195.0★

▲ 196%

What buyers say about 420cc engine

What buyers praise and complain about, mined from review topics.

What buyers love

Value For Money21%

“worth it, for my needs”

Size-Overall15%

“Perfect fit for 13 HP Predator engine”

Motor Power14%

“Great Engine”

Quality-Overall10%

“Looks to be a very good motor”

Efficiency8%

“Works well”

Drop/Impact Protection6%

“I liked the protection system”

Ease Of Use6%

“It was easy to replace”

Durability4%

“Durable finish and fairly heavy gauge metal”

Assembly/Installation3%

“Easy to start on second pull out of the box”

Advertised Vs Actual Product3%

“As discribed”

What buyers complain about

Quality-Overall29%

“The quality for sure is not great in terms of the shipping”

Defective Material/Parts14%

“but 1 of the oil dip stick was broken”

Heating14%

“But cheap part broke after heating it up”

Size-Overall7%

“Can't find anything that fits it”

Hard Feel5%

“thing pulls hard”

Thickness4%

“But not quite 3/16" thick.”

Top return reasons

Size-Overall42%
Motor Issues16%
Defective Material/Parts13%
Mounting13%
Functionality-Overall9%
Adhesion/Stickiness4%
Unsustainable Design4%
Leak-Proof2%

Common questions

Is 420cc engine profitable to sell on Amazon United States?
The niche generates $122K/yr across 27 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is +4.2%. Flapen's verdict: Skip it (46/100).
How competitive is the 420cc engine niche?
21 brands and 24 sellers compete. The top 5 products take 49% of clicks and top 5 brands hold 62% of demand.
What do buyers complain about in 420cc engine?
Top complaints mined from reviews: Quality-Overall, Defective Material/Parts, Heating. The return rate is 1.4%.
What does it cost to enter the 420cc engine niche?
Listings span $24.41–$374.76; the average listing price is $193.55 (sweet spot $15–$100). The average incumbent carries 27 reviews — the moat a new listing must climb.