---
title: "Honda Gx390 Starter — $53K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/honda-gx390-starter"
last_updated: "2026-08-11T02:40:42.148Z"
locale: en
meta:
description: "Niche score 49/100 · $53K/yr market · 11K searches/yr · $45.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $53K/yr market · 11K searches/yr · $45.22 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Honda Gx390 Starter — $53K/yr Amazon US Niche (2026) - Flapen"
---
# **honda gx390 starter**
**Skip it**
A small market ($53K/yr) — this niche doesn't clear our bar today.
Market size 13Growth 20Conversion 90Competition 22Returns 62Price range 95Avg price 95Brand share 36Review moat 93Quality gap 79
**Avg price**
**Incredible****$45.22**
avg listing price — sweet spot $15–$100
**Price range**
**Incredible****$18.86–$86.05**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Review moat**
**Great****130.31**
avg incumbent reviews — the moat a new listing must climb
**Conversion**
**Great****10.8%**
search→purchase rate — share of searches ending in a sale
**Quality gap**
**Great****4.2★**
avg incumbent rating — lower means beatable quality
**Returns**
**Good****2.5%**
return rate — above 5% kills the launch gate
**Brand share**
**Okay****83%**
top-5 brand share — brands hold most of the demand
**Competition**
**Bad****74%**
top-5 click share — a locked-up shelf
**Growth**
**Bad****-10.7%**
90-day search growth — must beat 0% to launch
**Market size**
**Bad****$53K**
$53K/yr · 11K searches
According to Flapen's Amazon United States niche tracking, honda gx390 starter is a $53K/yr Amazon United States market (11K searches/yr). The top 5 brands hold 83% of demand. Verdict: Skip it — 49/100.
Data updated Jul 9, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **honda gx390 starter market data**
- **Units sold / yr**
- **1K–2K**
- avg 100–250/product
- **Revenue / yr**
- **$57K–$68K**
- units × avg price
- **Conversion rate**
- **10.8%**
- **Avg BSR**
- **#575**
- **Page quality**
- **0%**
- **Prime**
- **100%**
- **Sponsored**
- **100%**
- **Out of stock**
- **0.0%**
- **Avg brand age**
- **51 months**
- **Avg seller age**
- **202 days**
## **Competition & brand share**
The top 5 products capture 74% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**10 **▲rising
**Sellers**
**12**
**Top-5 brand share**
**83%**
Top 20: 100%
**Top-5 click share**
**74%**
Top 20: 100%
**Open market**
**12%**
- YAMAKATO47% - RANSOTO14% - Parts Player10% - DynaVim Parts8% - Ezamintaly5% - San-IgniteX4% - Open — no brand owns it (4 brands, 12%)
## **Demand**
Weekly Amazon search volume, last 23 weeks — -10.7% search growth over the last 90 days.
350250Spike '26Feb '26Feb '26Mar '26Apr '26Apr '26May '26Jun '26Jun '26
[**Open Trend **](https://flapen.com/research/us/automotive/honda-gx390-starter/trend)
## **Top honda gx390 starter 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%15%$8K30%$16K45%$24K60%$32K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 13 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**YAMAKATO GX340 GX390 Starter Motor w/Solenoid for Honda Electric Start Toro Dingo 11-13HP 128000-2750 31210ZB80130 31210ZE3013 31210ZE30130 31210-ZE3-023 DB5B6 DB5B8 SND0288 41052044**YAMAKATO**$39.85**4.4★93 rev](https://www.amazon.com/dp/B0BZP3FBG5) [2**Starter Motor Compatible with Honda GX340 GX390 GX420 11HP 13HP 16HP Afron Allmand Ditch Witch with Solenoid Replaces 1280002750 31210ZB80130 31210ZE30130 31210-ZE3-023 DB5B6 DB5B8 SND0288**RANSOTO**$33.73**4.4★348 rev](https://www.amazon.com/dp/B0829WH4GY) [3**OEG Parts New Starter Compatible with Honda Toro GX340 GX390 Dingo 11-13HP 1280002750 31210ZB80130 31210ZE3013 31210ZE30130 31210-ZE3-023 DB5B6 DB5B8 SND0288 41052044**Parts Player**$36.26**4.5★423 rev](https://www.amazon.com/dp/B00TH3ZNRG) [4**New Honda GX340 GX390 GX420 Starter 11-13HP Toro Dingo TX-413 2004 2005 2006 2007 2008 410-52044 128000-2750 128000-3400 31210-ZE3-013 31210-ZE3-023 9712809-275 113231 DB5B6 DB5B8 SND0288**DynaVim Parts**$45.33**4.3★46 rev](https://www.amazon.com/dp/B0CT2JVXN2) [5**Ezamintaly Starter Motor for Honda GX340 GX390 GX420 for Toro Dingo TX-413 11-13HP for Ditch Witch Afron Allmand 31210-ZE3-013 31210-ZE3-023 31210ZE30130 DB5B6 DB5B8 1280002750**Ezamintaly**$30.23**4.1★8 rev](https://www.amazon.com/dp/B0DCVCSPJ2)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Starter for Honda GX390 GX340 GX420 11HP 13HP 16HP/Toro Dingo TX-413 2004-2008/Ditch Witch FM13/1030/1230/100SX/Allmand EZ1100 1994-2005/Afron PA-300/350 1990-2006 31210ZB80130**OLIFANT**$42.47**2 rev4mo ago](https://www.amazon.com/dp/B0GK119W3X) [**YAMAKATO GX390 High Power Starter Motor for Honda GX340 Electric Start Toro 11-16HP 128000-2750 31210-ZB8-0130 31210-ZE3-013 31210-ZE3-0130 31210-ZE3-023 DB5B6 DB5B8 SND0288 w/Solenoid**YAMAKATO**$49.40**4 rev11mo ago](https://www.amazon.com/dp/B0FM7NR4FS) [**San-IgniteX Electric Starter Motor for Honda GX340/GX390 & Harbor Freight Predator 420cc OEM- 60340/60349/69736 - Compatible with Toro Dingo TX-413 & Cummins Onan HomeSite Power 6500 Generator**San-IgniteX**$35.01**21 rev1y ago](https://www.amazon.com/dp/B0F9NKBGQJ) [**SOFO Electric Starter Kit for Honda GX340 GX390 11HP 13HP Engines and Generators w/Flywheel Starter Motor Key Switch Box Coil Ignition**SOFO**$86.05**23 rev1y ago](https://www.amazon.com/dp/B0DJXMRW46) [**Complete Starter Kit for Honda GX340 / GX390 Engines 12V Starter Solenoid Ring Gear Ignition Key Switch & Wiring Fits GX340 (11HP) GX390 (13HP) Replaces 31210-ZE3-033/31210-ZE3-013**RANSOTO**$84.83**27 rev1y ago](https://www.amazon.com/dp/B0DG5B7Q6F)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Starter for Honda GX390 GX340 GX420 11HP 13HP 16HP/Toro Dingo TX-413 2004-2008/Ditch Witch FM13/1030/1230/100SX/Allmand EZ1100 1994-2005/Afron PA-300/350 1990-2006 31210ZB80130**OLIFANT**$42.47**4.0★**▲ 242%**](https://www.amazon.com/dp/B0GK119W3X) [**San-IgniteX Electric Starter Motor for Honda GX340/GX390 & Harbor Freight Predator 420cc OEM- 60340/60349/69736 - Compatible with Toro Dingo TX-413 & Cummins Onan HomeSite Power 6500 Generator**San-IgniteX**$35.01**3.8★**▲ 93%**](https://www.amazon.com/dp/B0F9NKBGQJ) [**YAMAKATO GX390 High Power Starter Motor for Honda GX340 Electric Start Toro 11-16HP 128000-2750 31210-ZB8-0130 31210-ZE3-013 31210-ZE3-0130 31210-ZE3-023 DB5B6 DB5B8 SND0288 w/Solenoid**YAMAKATO**$49.40**4.6★**▲ 88%**](https://www.amazon.com/dp/B0FM7NR4FS) [**YAMAKATO GX340 GX390 Pull Start Recoil Starter Assembly for Honda GX 340 GX 390 389 420 439 cc 11 13 hp Generator Replaces 28400-ZE3-W01ZA Pull Cord Rope Aftermarket**YAMAKATO**$18.86**4.6★**▲ 61%**](https://www.amazon.com/dp/B0B88HSF3M) [**YAMAKATO GX340 GX390 Starter Motor w/Solenoid for Honda Electric Start Toro Dingo 11-13HP 128000-2750 31210ZB80130 31210ZE3013 31210ZE30130 31210-ZE3-023 DB5B6 DB5B8 SND0288 41052044**YAMAKATO**$39.85**4.4★**▲ 61%**](https://www.amazon.com/dp/B0BZP3FBG5)
**~~View all trending →~~**
## **What buyers say about honda gx390 starter**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Size-Overall**26%
*“Fit perfectly”*
**Quality-Overall**14%
*“Good quality”*
**Value For Money**12%
*“Works good reasonable price”*
**Efficiency**12%
*“Works fine”*
**Advertised Vs Actual Product**9%
*“As described”*
**Assembly/Installation**7%
*“Esy to Install, Works perfectly”*
**Functionality-Overall**3%
*“Plug and play and got my work done just like that”*
**Ease Of Use**3%
*“easy to overcome”*
**Motor Power**2%
*“Starter motor works fine”*
**Soft Feel**2%
*“Feels buttery smooth to pull”*
### **What buyers complain about **
**Quality-Overall**29%
*“Trash”*
**Durability**14%
*“died”*
**Advertised Vs Actual Product**8%
*“This difference is not mentioned in the description or shown in any of the pictures”*
**Compatibility-Overall**8%
*“It does not fit the Westinghouse 9500 Watt generator”*
**Battery Life**4%
*“people need a real life one thing or if you are putting these starters on the mini excavator most of those mini excavator don't have a charging system so you want to keep Battery tenders on at night”*
**Functionality-Overall**4%
*“do not work”*
**Defective Material/Parts**4%
*“product didnt function correctly”*
**Flammable**4%
*“Then smoke came out of it”*
**Charging**3%
*“As mentioned the charge stator bolts are to short”*
**Weight Light**1%
*“Only downside is it feels a little lighter than OEM”*
### **Top return reasons **
**Size-Overall**29%
**Motor Issues**16%
**Functionality-Overall**15%
**Defective Material/Parts**14%
**Compatibility-Overall**7%
**Durability**6%
**Advertised Vs Actual Product**4%
**Mounting**2%
**Assembly/Installation**2%
**Value For Money**1%
## **Common questions**
- **Is honda gx390 starter profitable to sell on Amazon United States?**
- The niche generates $53K/yr across 13 tracked products. 1 of 2 products launched in the last 360 days are still selling. 90-day search growth is -10.7%. Flapen's verdict: Skip it (49/100).
- **How competitive is the honda gx390 starter niche?**
- 10 brands and 12 sellers compete. The top 5 products take 74% of clicks and top 5 brands hold 83% of demand.
- **What do buyers complain about in honda gx390 starter?**
- Top complaints mined from reviews: Quality-Overall, Durability, Advertised Vs Actual Product. The return rate is 2.5%.
- **What does it cost to enter the honda gx390 starter niche?**
- Listings span $18.86–$86.05; the average listing price is $45.22 (sweet spot $15–$100). The average incumbent carries 130 reviews — the moat a new listing must climb.
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