Is honda gx390 carburetor profitable to sell on Amazon United States?

The niche generates $278K/yr across 17 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -12.0%. Flapen's verdict: Worth a look (52/100).

How competitive is the honda gx390 carburetor niche?

16 brands and 20 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 71% of demand.

What do buyers complain about in honda gx390 carburetor?

Top complaints mined from reviews: Quality-Overall, Defective Material/Parts, Durability. The return rate is 2.2%.

When does demand for honda gx390 carburetor peak?

Demand peaks in May; the busiest month runs 1.7× the quietest.

What does it cost to enter the honda gx390 carburetor niche?

Listings span $12.90–$72.37; the average listing price is $31.08 (sweet spot $15–$100). The average incumbent carries 242 reviews — the moat a new listing must climb.

honda gx390 carburetor

Worth a look

Shows a sweet-spot price point ($31.08 avg), but soft demand (-12.0% this quarter) keeps it on the watch list.

Avg price

Incredible$31.08

avg listing price — sweet spot $15–$100

Price range

Great$12.90–$72.37

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

Review moat

Great242.12

avg incumbent reviews — the moat a new listing must climb

Conversion

Great9.4%

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

Returns

Good2.2%

return rate — above 5% kills the launch gate

Brand share

Good71%

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

Market size

Good$278K

$278K/yr · 95K searches

Quality gap

Okay4.5★

avg incumbent rating — lower means beatable quality

Competition

Bad71%

top-5 click share — a locked-up shelf

Growth

Bad-12.0%

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

Signals Low Review Barrier

According to Flapen's Amazon United States niche tracking, honda gx390 carburetor is a $278K/yr Amazon United States market (95K searches/yr). The top 5 brands hold 71% of demand. Demand peaks in May. Verdict: Worth a look — 52/100.

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

honda gx390 carburetor market data

Units sold / yr: 10K–13K; avg 500–750/product
Revenue / yr: $311K–$389K; units × avg price
Conversion rate: 9.4%
Avg BSR: #591
Page quality: 0%
Prime: 94%
Sponsored: 88%
Out of stock: 0.8%
Avg brand age: 46 months
Avg seller age: 192 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

16 rising

Sellers

Top-5 brand share

71%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

24%

Powtol26%
Ruma16%
DKIIGAME13%
TURBOTUNITY9%
Keihin7%
ALFUL5%

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — -12.0% search growth over the last 90 days.

Peak months: May · busiest ÷ quietest = 1.7×

Open Trend

Top honda gx390 carburetor search terms

honda gx390 carburetor40K/yr -13.1%10.7% conv.
gx390 carburetor29K/yr -13.9%7.5% conv.
honda gx340 carburetor11K/yr -12.8%9.6% conv.
honda gx 390 carburetor8K/yr -13.5%12.5% conv.
gx340 carburetor4K/yr +9.8%10.2% conv.
gx 390 carburetor3K/yr +15.7%10.2% conv.

All search terms

Top honda gx390 carburetor 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★)

All 17 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Powtol Ruixing GX390 13HP Carburetor for Honda GX 390 Engines Pressure Washer Replace 16100-ZF6-V01 16100-Z5T-901 with 17210-ZE3-505 Air Filter

Powtol$21.114.7★499 rev

Ruma Adjustable Carburetor Air filter Kit for Honda GX340 GX390 GX420 11HP 13HP 16HP Engine Harbor Freight Predator 420cc Engine and Power Equipment

Ruma$19.324.7★342 rev

GX390 Carburetor Replacement for Honda GX390 GX 390 GX340 GX340U1 GX340R1 GX340K1 WT40XK1 WT40XK2 WT40XK3 13HP 11HP 16100-ZE3-V01 Generator Lawnmower Engine

DKIIGAME$14.504.4★706 rev

TURBOTUNITY Carburetor 16100-ZF6-V01 for Honda GX390 GX340 Predator 420 11hp 13hp 339 389cc 420cc Engines Mini bike Lawn Mower 4000psi Pressure Washer Carb Replacement

TURBOTUNITY$21.024.5★222 rev

Superb KEIHIN OEM Carburetor 16100-Z5T-901 Genuine OEM Carb GX390 GX340 Quality Carb

Keihin$72.374.4★81 rev

Newest

by launch date

Genuine Carburetor Assy 16100-Z1C-V01 with Genuine Gaskets for Honda Engine GX390

KINDZA$69.7914 rev

11mo ago

Ruixing GX390 Carburetor for Honda GX340 GX390 11hp 13HP OHV 389cc Engine Lawn Mower Generator water pumps pressure washers Predator 420cc 339 459cc 338cc 420 16100-ZF6-V01 16100-Z5T-901 4000psi Carb

ALFUL$28.4541 rev

1y ago

Hipa Ruixing GX390 Carburetor for Honda 13HP GX 390 Carb GX390K1 13 HP Engines Replace 16100-ZF6-V01 16100-Z5T-901 DXPW60605 DXPW60606 Pressure Washer with 17210-ZE3-505 Air Filter

Hipa$18.3747 rev

1y ago

TURBOTUNITY Carburetor 16100-ZF6-V01 for Honda GX390 GX340 Predator 420 11hp 13hp 339 389cc 420cc Engines Mini bike Lawn Mower 4000psi Pressure Washer Carb Replacement

TURBOTUNITY$21.02222 rev

2y ago

Superb KEIHIN OEM Carburetor 16100-Z5T-901 Genuine OEM Carb GX390 GX340 Quality Carb

Keihin$72.3781 rev

2y ago

What buyers say about honda gx390 carburetor

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

What buyers love

Size-Overall27%

“Everything fits exactly like the original factory parts”

Value For Money21%

“Great value”

Efficiency13%

“engine runs good now”

Quality-Overall10%

“the build quality feels heavy duty”

Assembly/Installation9%

“Easy to install”

Advertised Vs Actual Product5%

“just as described”

Fuel Efficiency2%

“Once the fuel cleared the lines, it fired right up, idled smoothly, and ran with zero surging under full pressure”

Durability2%

“There carburetors hold up very well”

Functionality-Overall2%

“I used my old throttle off the old carb works perfectly jetted properly”

Correct Contents2%

“Plenty of extra pieces included”

What buyers complain about

Quality-Overall13%

“Poor quality control”

Defective Material/Parts13%

“Cheap parts”

Durability8%

“Carburetor fell apart after being installed”

Leak-Proof8%

“Leaks gas into oil pan”

Advertised Vs Actual Product8%

“All items didnt fit as it indicated”

Pressure5%

“stock problems with my 4300 psi pressure washer This one arrived next day”

Functionality-Overall5%

“This wouldn't work”

Size-Overall4%

“Not a o e m fit”

Fuel Efficiency3%

“air/fuel ratio seems a little off”

Connectivity-Overall3%

“The linkages don't always hook up properly”

Top return reasons

Size-Overall40%

Compatibility-Overall15%

Defective Material/Parts9%

Functionality-Overall9%

Advertised Vs Actual Product5%

Assembly/Installation3%

Mechanism Issues2%

Motor Issues2%

Leak-Proof2%

Mounting2%

Common questions

Is honda gx390 carburetor profitable to sell on Amazon United States?: The niche generates $278K/yr across 17 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is -12.0%. Flapen's verdict: Worth a look (52/100).
How competitive is the honda gx390 carburetor niche?: 16 brands and 20 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 71% of demand.
What do buyers complain about in honda gx390 carburetor?: Top complaints mined from reviews: Quality-Overall, Defective Material/Parts, Durability. The return rate is 2.2%.
When does demand for honda gx390 carburetor peak?: Demand peaks in May; the busiest month runs 1.7× the quietest.
What does it cost to enter the honda gx390 carburetor niche?: Listings span $12.90–$72.37; the average listing price is $31.08 (sweet spot $15–$100). The average incumbent carries 242 reviews — the moat a new listing must climb.