---
title: "Honda Gx390 Carburetor — $278K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/patio-lawn-garden/honda-gx390-carburetor"
last_updated: "2026-08-11T01:04:01.323Z"
locale: en
meta:
description: "Niche score 52/100 · $278K/yr market · 95K searches/yr · $31.08 avg price. Soft demand (-12.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $278K/yr market · 95K searches/yr · $31.08 avg price. Soft demand (-12.0% this quarter) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Honda Gx390 Carburetor — $278K/yr Amazon US Niche (2026) - Flapen"
---
# **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.
Market size 50Growth 19Conversion 85Competition 24Returns 69Price range 92Avg price 95Brand share 57Review moat 88Quality gap 33
**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**
**Great****242.12**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Great****9.4%**
search→purchase rate — share of searches ending in a sale
**Returns**
**Good****2.2%**
return rate — above 5% kills the launch gate
**Brand share**
**Good****71%**
top-5 brand share — brands hold most of the demand
**Market size**
**Good****$278K**
$278K/yr · 95K searches
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Competition**
**Bad****71%**
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**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
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 ~~](https://flapen.com/research/methodology)
## **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**
**20**
**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.
5K4KSpike '24Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
Peak months: May · busiest ÷ quietest = 1.7×
[**Open Trend **](https://flapen.com/research/us/patio-lawn-garden/honda-gx390-carburetor/trend)
## **Top honda gx390 carburetor search terms**
- **honda gx390 carburetor**40K/yr-13.1%10.7% conv. - **gx390 carburetor**29K/yr-13.9%7.5% conv. - **honda gx340 carburetor**11K/yr-12.8%9.6% conv. - **honda gx 390 carburetor**8K/yr-13.5%12.5% conv. - **gx340 carburetor**4K/yr+9.8%10.2% conv. - **gx 390 carburetor**3K/yr+15.7%10.2% conv. [**All search terms **](https://flapen.com/research/us/patio-lawn-garden/honda-gx390-carburetor/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.
0%10%$28K20%$56K30%$83K40%$111K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
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
[1**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**$21.11**4.7★499 rev](https://www.amazon.com/dp/B07KC7LVKJ) [2**Ruma Adjustable Carburetor Air filter Kit for Honda GX340 GX390 GX420 11HP 13HP 16HP Engine Harbor Freight Predator 420cc Engine and Power Equipment**Ruma**$19.32**4.7★342 rev](https://www.amazon.com/dp/B098MDWTKY) [3**GX390 Carburetor Replacement for Honda GX390 GX 390 GX340 GX340U1 GX340R1 GX340K1 WT40XK1 WT40XK2 WT40XK3 13HP 11HP 16100-ZE3-V01 Generator Lawnmower Engine**DKIIGAME**$14.50**4.4★706 rev](https://www.amazon.com/dp/B087CQ1H5R) [4**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**$21.02**4.5★222 rev](https://www.amazon.com/dp/B0CTBNMNXD) [5**Superb KEIHIN OEM Carburetor 16100-Z5T-901 Genuine OEM Carb GX390 GX340 Quality Carb**Keihin**$72.37**4.4★81 rev](https://www.amazon.com/dp/B091MM3H6D)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Genuine Carburetor Assy 16100-Z1C-V01 with Genuine Gaskets for Honda Engine GX390**KINDZA**$69.79**14 rev11mo ago](https://www.amazon.com/dp/B0FLKP3QRQ) [**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**$28.45**41 rev1y ago](https://www.amazon.com/dp/B0F896LW5B) [**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**$18.37**47 rev1y ago](https://www.amazon.com/dp/B0DMSTSGCJ) [**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**$21.02**222 rev2y ago](https://www.amazon.com/dp/B0CTBNMNXD) [**Superb KEIHIN OEM Carburetor 16100-Z5T-901 Genuine OEM Carb GX390 GX340 Quality Carb**Keihin**$72.37**81 rev2y ago](https://www.amazon.com/dp/B091MM3H6D)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Honda OEM 16100-Z5T-922 Engine Carburetor (Bec0a A) GX390RT2 GX390T2 GX390T2X GX390UT2 GX390UT2X WT40XK3**Honda**$71.94**5.0★**▲ 132%**](https://www.amazon.com/dp/B0C9SCFVW2) [**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**$28.45**4.3★**▲ 103%**](https://www.amazon.com/dp/B0F896LW5B) [**YAMAKATO Huayi P27 Predator 420cc Carburetor 16100-ZF6-V01 for Honda and Clone GX390 GX340 11hp Predator 13hp Pressure Washer Snow Blower Mini Bikes**YAMAKATO**$27.14**4.3★**▲ 76%**](https://www.amazon.com/dp/B09MJ94PB1) [**GX390 Carburetor+Ignition Coil Air Filter Kit Compatible with GX340 GX360 GX390 11HP 13HP Engine Generator Lawn Mower Motor Replaces# 16100-ZF6-V01**LIYYOO**$23.17**4.5★**▲ 39%**](https://www.amazon.com/dp/B07Q8XJ4NS) [**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**$21.11**4.7★**▲ 35%**](https://www.amazon.com/dp/B07KC7LVKJ)
**~~View all trending →~~**
## **What buyers say about honda gx390 carburetor**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**27%
*“Everything fits exactly like the original factory parts”*
**Value For Money**21%
*“Great value”*
**Efficiency**13%
*“engine runs good now”*
**Quality-Overall**10%
*“the build quality feels heavy duty”*
**Assembly/Installation**9%
*“Easy to install”*
**Advertised Vs Actual Product**5%
*“just as described”*
**Fuel Efficiency**2%
*“Once the fuel cleared the lines, it fired right up, idled smoothly, and ran with zero surging under full pressure”*
**Durability**2%
*“There carburetors hold up very well”*
**Functionality-Overall**2%
*“I used my old throttle off the old carb works perfectly jetted properly”*
**Correct Contents**2%
*“Plenty of extra pieces included”*
### **What buyers complain about **
**Quality-Overall**13%
*“Poor quality control”*
**Defective Material/Parts**13%
*“Cheap parts”*
**Durability**8%
*“Carburetor fell apart after being installed”*
**Leak-Proof**8%
*“Leaks gas into oil pan”*
**Advertised Vs Actual Product**8%
*“All items didnt fit as it indicated”*
**Pressure**5%
*“stock problems with my 4300 psi pressure washer This one arrived next day”*
**Functionality-Overall**5%
*“This wouldn't work”*
**Size-Overall**4%
*“Not a o e m fit”*
**Fuel Efficiency**3%
*“air/fuel ratio seems a little off”*
**Connectivity-Overall**3%
*“The linkages don't always hook up properly”*
### **Top return reasons **
**Size-Overall**40%
**Compatibility-Overall**15%
**Defective Material/Parts**9%
**Functionality-Overall**9%
**Advertised Vs Actual Product**5%
**Assembly/Installation**3%
**Mechanism Issues**2%
**Motor Issues**2%
**Leak-Proof**2%
**Mounting**2%
## **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.
## **Related niches in Patio, Lawn & Garden**
- 82 [**lawn aerator**](https://flapen.com/research/us/patio-lawn-garden/lawn-aerator)$6.2M/yr+90.1%**Launch it**- 82 [**shepherds hooks for outdoor**](https://flapen.com/research/us/patio-lawn-garden/shepherds-hooks-for-outdoor)$3.9M/yr+141.2%**Launch it**- 82 [**garden mesh**](https://flapen.com/research/us/patio-lawn-garden/garden-mesh)$716K/yr+152.7%**Worth a look**- 83 [**chicken waterer**](https://flapen.com/research/us/patio-lawn-garden/chicken-waterer)$3.4M/yr+70.1%**Launch it**- 83 [**75 foot garden hose**](https://flapen.com/research/us/patio-lawn-garden/75-foot-garden-hose)$1.8M/yr+117.6%**Launch it**- 83 [**bird deterrents for outside**](https://flapen.com/research/us/patio-lawn-garden/bird-deterrents-for-outside)$2.1M/yr+131.5%**Launch it**[**All Patio, Lawn & Garden niches **](https://flapen.com/research/us/patio-lawn-garden)