---
title: "Rcj6y Spark Plug — $37K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/automotive/rcj6y-spark-plug"
last_updated: "2026-08-06T14:57:47.402Z"
locale: en
meta:
description: "Niche score 52/100 · $37K/yr market · 26K searches/yr · $8.43 avg price. A small market ($37K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:description": "Niche score 52/100 · $37K/yr market · 26K searches/yr · $8.43 avg price. A small market ($37K/yr) keeps it on the watch list. Data updated Jul 2026."
"og:title": "Rcj6y Spark Plug — $37K/yr Amazon US Niche (2026) - Flapen"
---
# **rcj6y spark plug**
**Worth a look**
Shows searches that convert (16.7% search→purchase), but a small market ($37K/yr) keeps it on the watch list.
Market size 9Growth 95Conversion 98Competition 32Returns 93Price range 12Avg price 23Brand share 43Review moat 72Quality gap 24
**Conversion**
**Incredible****16.7%**
search→purchase rate — share of searches ending in a sale
**Growth**
**Incredible****+112.6%**
90-day search growth — must beat 0% to launch
**Returns**
**Great****1.1%**
return rate — above 5% kills the launch gate
**Review moat**
**Good****611.25**
avg incumbent reviews — the moat a new listing must climb
**Brand share**
**Okay****79%**
top-5 brand share — brands hold most of the demand
**Competition**
**Okay****66%**
top-5 click share — leaders hold, buyers still browse
**Quality gap**
**Bad****4.6★**
avg incumbent rating — lower means beatable quality
**Avg price**
**Bad****$8.43**
avg listing price — sweet spot $15–$100
**Price range**
**Bad****$3.92–$16.44**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Market size**
**Bad****$37K**
$37K/yr · 26K searches
**Signals**[** Trending**](https://flapen.com/research/niches?market=us&signal=trending "Search growth > 100% (90d)")
According to Flapen's Amazon United States niche tracking, rcj6y spark plug is a $37K/yr Amazon United States market (26K searches/yr). The top 5 brands hold 79% of demand. Demand peaks in Apr–May. Verdict: Worth a look — 52/100.
Data updated Jul 11, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **rcj6y spark plug market data**
- **Units sold / yr**
- **5K–6K**
- avg 250–500/product
- **Revenue / yr**
- **$42K–$51K**
- units × avg price
- **Conversion rate**
- **16.7%**
- **Avg BSR**
- **#258**
- **Page quality**
- **0%**
- **Prime**
- **94%**
- **Sponsored**
- **75%**
- **Out of stock**
- **3.9%**
- **Avg brand age**
- **50 months**
- **Avg seller age**
- **170 days**
## **Competition & brand share**
The top 5 products take 66% of clicks — established leaders, but buyers still shop beyond them.
**Brands**
**12 **▲rising
**Sellers**
**62**
**Top-5 brand share**
**79%**
Top 20: 100%
**Top-5 click share**
**66%**
Top 20: 100%
**Open market**
**17%**
- Champion45% - Hipa12% - Adefol9% - LEFITPA9% - Yistiun4% - GULUANT4% - Open — no brand owns it (6 brands, 17%)
## **Demand & seasonality**
Weekly Amazon search volume, last 56 weeks — +112.6% search growth over the last 90 days.
800600Spike '25Spike '26 seasonJunJulAugSepOctNovDecJanFebMarAprMayJun
Peak months: Apr, May · busiest ÷ quietest = 3.5×
[**Open Trend **](https://flapen.com/research/us/automotive/rcj6y-spark-plug/trend)
## **Top rcj6y spark plug search terms**
- **rcj6y spark plug**10K/yr+110.3%14.6% conv. - **champion rcj6y spark plug**9K/yr+118.2%18.5% conv. - **champion rcj6y**4K/yr+108.1%14.3% conv. - **rcj6y**4K/yr+110.9%14.9% conv. [**All search terms **](https://flapen.com/research/us/automotive/rcj6y-spark-plug/search-terms)
## **Top rcj6y spark plug 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%$4K20%$7K30%$11K40%$15K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 16 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**Champion Copper Plus Small Engine 852 (RCJ6Y) Pack of 4 (UPC 037551151714)**Champion**$15.03**4.7★1,021 rev](https://www.amazon.com/dp/B000VXEP20) [2**Champion Copper Plus Small Engine 852 (RCJ6Y) Pack of 1 (UPC 037551001040)**Champion**$4.94**4.7★1,021 rev](https://www.amazon.com/dp/B001HL3S82) [3**Hipa BPMR7A Spark Plug for NGK 6703 Champion RCJ6Y RCJ7Y Copper (4 Pack)**Hipa**$9.08**4.6★142 rev](https://www.amazon.com/dp/B0BD49WK8G) [4**Spark Plug Replacement for NGK BPMR7A L7T and for Champion CJ8 RCJ6Y RCJ7Y & More Types Sparkplug Adefol Spark Plugs Fit for Stihl & Husqvarna Chainsaw Lawnmower Engines**Adefol**$5.01**4.6★2,103 rev](https://www.amazon.com/dp/B087WHQSSF) [5**LEFITPA 2 Pack Replacement RCJ6Y Spark Plug for Champion Lawn Mower Models**LEFITPA**$8.61**4.4★58 rev](https://www.amazon.com/dp/B0C6MCHZYP)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**Yistiun BPMR7A Spark Plug for NGK BPMR7A BPM7A 6703;For Champion RCJ6Y RCJ7Y CJ7Y For Torch LR7TC For Carlton: SPCA6 SPCAR7 For Champion 859 For Dolmar 965603021 For Husqvarna 503235011 503235111**Yistiun**$3.92**4 rev5mo ago](https://www.amazon.com/dp/B0GKYTP49J) [**BPMR7A Spark Plug for NGK BPMR7A BPM7A Champion RCJ6Y RCJ7Y Torch LR7TC Sthil MS170 MS180 026 MS250 MS240 MS260 MS361 MS290 Chainsaw 4 PACK**Wetenex**$9.93**87 rev1y ago](https://www.amazon.com/dp/B0DSVHJVGY) [**GULUANT Replacement RCJ6Y Spark Plug for Champion Lawn Mower Models**GULUANT**$5.99**25 rev2y ago](https://www.amazon.com/dp/B0CVX1BKCQ) [**LEFITPA 2 Pack Replacement RCJ6Y Spark Plug for Champion Lawn Mower Models**LEFITPA**$8.61**58 rev3y ago](https://www.amazon.com/dp/B0C6MCHZYP) [**Spark Plug Replacement for NGK BPMR7A L7T and for Champion CJ8 RCJ6Y RCJ7Y & More Types Sparkplug Adefol Spark Plugs Fit for Stihl & Husqvarna Chainsaw Lawnmower Engines**Adefol**$5.01**2,103 rev3y ago](https://www.amazon.com/dp/B087WHQSSF)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**Yistiun BPMR7A Spark Plug for NGK BPMR7A BPM7A 6703;For Champion RCJ6Y RCJ7Y CJ7Y For Torch LR7TC For Carlton: SPCA6 SPCAR7 For Champion 859 For Dolmar 965603021 For Husqvarna 503235011 503235111**Yistiun**$3.92**5.0★**▲ 161%**](https://www.amazon.com/dp/B0GKYTP49J) [**Hipa BPMR7A Spark Plug for NGK 6703 Champion RCJ6Y RCJ7Y Copper (4 Pack)**Hipa**$9.08**4.6★**▲ 118%**](https://www.amazon.com/dp/B0BD49WK8G) [**GULUANT Replacement RCJ6Y Spark Plug for Champion Lawn Mower Models**GULUANT**$5.99**4.2★**▲ 65%**](https://www.amazon.com/dp/B0CVX1BKCQ) [**Champion (2 Pack) Copper Plus Small Engine Spark Plug - CJ6-2PK**Champion**$8.94**4.7★**▲ 62%**](https://www.amazon.com/dp/B00GG1D33I) [**Champion Copper Plus Small Engine 852 (RCJ6Y) Pack of 1 (UPC 037551001040)**Champion**$4.94**4.7★**▲ 54%**](https://www.amazon.com/dp/B001HL3S82)
**~~View all trending →~~**
## **What buyers say about rcj6y spark plug**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Advertised Vs Actual Product**24%
*“Exactly what you expect”*
**Socket/Port/Plug**18%
*“Good working spark plug”*
**Quality-Overall**15%
*“Good performance right out of the box”*
**Size-Overall**10%
*“Perfect fit”*
**Value For Money**10%
*“Affordability”*
**Assembly/Installation**3%
*“It worked great easy to install”*
**Efficiency**3%
*“Works great”*
**Motor Power**3%
*“Best for 2 cycle engines”*
**Brightness/Shine/Glow**3%
*“Good spark”*
**Locally Manufactured**2%
*“Nicely made, Brazil, saw started right up”*
### **What buyers complain about **
**Socket/Port/Plug**33%
*“Bad plug”*
**Heating**17%
*“Using to high temperature range will cause engine overheating and plug fouling”*
**Size-Overall**8%
*“Sized smaller than advertised”*
**Compatibility-Overall**8%
*“Air filters are not compatible with a Stihl MS250 as stated in the description”*
**Quality-Overall**6%
*“cheaper and same quality”*
### **Top return reasons **
**Size-Overall**59%
**Compatibility-Overall**8%
**Advertised Vs Actual Product**8%
**Defective Material/Parts**5%
**Functionality-Overall**5%
**Socket/Port/Plug**4%
**Value For Money**4%
**Product Condition**1%
**Motor Issues**1%
**Measurement/Reading Accuracy**1%
## **Common questions**
- **Is rcj6y spark plug profitable to sell on Amazon United States?**
- The niche generates $37K/yr across 16 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +112.6%. Flapen's verdict: Worth a look (52/100).
- **How competitive is the rcj6y spark plug niche?**
- 12 brands and 62 sellers compete. The top 5 products take 66% of clicks and top 5 brands hold 79% of demand.
- **What do buyers complain about in rcj6y spark plug?**
- Top complaints mined from reviews: Socket/Port/Plug, Heating, Size-Overall. The return rate is 1.1%.
- **When does demand for rcj6y spark plug peak?**
- Demand peaks in Apr–May; the busiest month runs 3.5× the quietest.
- **What does it cost to enter the rcj6y spark plug niche?**
- Listings span $3.92–$16.44; the average listing price is $8.43 (sweet spot $15–$100). The average incumbent carries 611 reviews — the moat a new listing must climb.
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