Is diesel engine profitable to sell on Amazon United States?

The niche generates $70K/yr across 31 tracked products. 1 of 12 products launched in the last 360 days are still selling. 90-day search growth is +10.1%. Flapen's verdict: Skip it (46/100).

How competitive is the diesel engine niche?

27 brands and 30 sellers compete. The top 5 products take 50% of clicks and top 5 brands hold 51% of demand.

What do buyers complain about in diesel engine?

Top complaints mined from reviews: Size-Overall, Assembly/Installation, Strength. The return rate is 0.6%.

When does demand for diesel engine peak?

Demand is steady year-round — the busiest month runs 1.3× the quietest.

What does it cost to enter the diesel engine niche?

Listings span $64.35–$3119.39; the average listing price is $296.42 (sweet spot $15–$100). The average incumbent carries 10 reviews — the moat a new listing must climb.

diesel engine

Skip it

Weak search conversion (0.1%) — this niche doesn't clear our bar today.

Review moat

Incredible9.9

avg incumbent reviews — the moat a new listing must climb

Returns

Incredible0.6%

return rate — above 5% kills the launch gate

Brand share

Great51%

top-5 brand share — no brand owns this niche

Competition

Good50%

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

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Growth

Okay+10.1%

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

Avg price

Okay$296.42

avg listing price — sweet spot $15–$100

Market size

Bad$70K

$70K/yr · 264K searches

Conversion

Bad0.1%

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

Price range

Bad$64.35–$3119.39

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

Signals No Dominant Brand Low Review Barrier High Price

According to Flapen's Amazon United States niche tracking, diesel engine is a $70K/yr Amazon United States market (264K searches/yr). The top 5 brands hold 51% of demand. Verdict: Skip it — 46/100.

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

diesel engine market data

Units sold / yr: 250–500; avg 0–100/product
Revenue / yr: $74K–$148K; units × avg price
Conversion rate: 0.1%
Avg BSR: #3,234
Page quality: 0%
Prime: 13%
Sponsored: 94%
Out of stock: 7.6%
Avg brand age: 39 months
Avg seller age: 181 days

Competition & brand share

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

Brands

27 rising

Sellers

Top-5 brand share

51%

Top 20: 93%

Top-5 click share

50%

Top 20: 90%

Open market

41%

TBVECHI14%
DUIBAII11%
Resfirme9%
PROYONGOO9%
DDYOOK8%
JDCEREN8%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +10.1% search growth over the last 90 days.

No pronounced peak months · busiest ÷ quietest = 1.3×

Open Trend

Top diesel engine search terms

diesel engine139K/yr +13.1%0.1% conv.
small diesel engine42K/yr +11.6%0.1% conv.
diesel motor22K/yr +0.9%0.0% conv.
2 cylinder diesel engine6K/yr +69.6%0.0% conv.
diesel engine 20hp3K/yr +59.3%0.0% conv.
10hp diesel engine6K/yr +6.8%0.3% conv.
mini diesel engine6K/yr +0.2%0.1% conv.
diesel go kart engine4K/yr +20.2%0.0% conv.
diesel engine electric start5K/yr +13.3%0.2% conv.
single cylinder diesel engine5K/yr +9.2%0.0% conv.

All search terms

Top diesel 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.

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

TBVECHI Diesel Engine 4 Stroke 10HP 418CC Diesel Motor Engine Heavy Duty Single Cylinder Air- Cooled Recoil 3600RPM Single Cylinder Air Cooled Machine

TBVECHI$303.354.0★22 rev

DUIBAII 10HP 4 Stroke Diesel Engine 418CC 6300W Single Cylinder Air-Cooled Diesel Motor Recoil Manual Start Small Diesel Engine for Tillers Generators Vehicles

DUIBAII$305.984.0★23 rev

Resfirme 196cc 4 Stroke Diesel Engine 2200w 3000r/Min Go Kart Motor Engine Single Cylinder Air Cooling Recoil Hand Start Diesel Motor (Orange+Black)

Resfirme$129.633.2★4 rev

PROYONGOO 10HP 4 Stroke Diesel Engine 418CC 6300W 3600RPM Diesel Motor with Single Cylinder Air-Cooled & 4 Bolt Pattern Aluminum Small Diesel Engine for Tillers Generators Vehicles Machinery

PROYONGOO$250.184.5★3 rev

DDYOOK 4-Stroke 3HP Diesel Engine 2.2KW Single-Cylinder Diesel Engine Recoil Start System Diesel Motor with Air-Cooling Portable Diesel Engine for Gardening Agriculture Tractor Bulldozer Harvester

DDYOOK$193.154.6★11 rev

Newest

by launch date

5HP Diesel Engine 4-Stroke 247cc Air Cooled Vertical Diesel Motor with 3600RPM Direct Injection for Agricultural Machinery Water Pump Generator Tiller

POIOKLJRE$150.061 rev

1mo ago

TANAUT 4-Stroke Single Cylinder Diesel Engine Motor Air Cooled 2200W 3800RPM Low Noise Agricultural Motor Rustproof Aluminum Alloy & Steel Structure for Farm Equipment Replacement

TANAUT$149.482 rev

2mo ago

4-Stroke Diesel Engine 196CC 2200W 3HP Small Diesel Engine Single Cylinder Hand Recoil Start Motor with Air Cooling System & 0.92 Gal Fuel Tank for Go Kart Lawn Mower Micro-Tiller Irrigation Machine

Mahugde$109.540 rev

2mo ago

10HP Air Cooled Diesel Engine 418cc 4-Stroke Diesel Motor with Recoil Start Forced Air Cooling Upright Diesel Engine for Small Agricultural Machinery Microfilters Generator Pumps

YYHGTRD$296.471 rev

3mo ago

TANAUT 4-Stroke 418CC Single Cylinder Diesel Engine 10HP 6.3KW Forced Air-Cooled Recoil Start 1 Inch Shaft Direct Injection Diesel Motor for Farm Garden Industrial Equipment

TANAUT$293.110 rev

3mo ago

What buyers say about diesel engine

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

What buyers love

Motor Power16%

“Good motor”

Design-Overall10%

“thoughtfully designed”

Value For Money9%

“Worth the money”

Assembly/Installation6%

“everything went together smoothly”

Fun/Entertainment Experience6%

“Very fun”

Quality-Overall4%

“Enjoyable build with quality, compatible parts”

Gifting Purpose4%

“My husband loved this gift”

Instructions/User Manual/Troubleshooting4%

“the instructions were clear”

Ease Of Use4%

“which keeps things simple”

Strength4%

“the components feel solid”

What buyers complain about

Size-Overall24%

“The chair wasnt sized right”

Assembly/Installation11%

“Check all your pieces before putting it together”

Strength6%

“Plus sadly it's very delicate to handle”

Fuel Efficiency4%

“I think the rated horsepower is off”

Motor Issues4%

“I expected a cheap, minimal motor, but”

Value For Money2%

“I do feel like this one is priced a bit higher than necessary tbh”

Noise Level1%

“The noise emitted by it when the motor function is turned on is a bit noisy”

Top return reasons

Size-Overall24%

Defective Material/Parts24%

Functionality-Overall18%

Advertised Vs Actual Product15%