---
title: "rj19lm champion spark plug — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/rj19lm-champion-spark-plug"
last_updated: "2026-07-14T09:03:24.431Z"
locale: en
meta:
  description: "brand-locked demand (top 5 brands take 100% of clicks) — rj19lm champion spark plug doesn't clear our bar today."
  "og:description": "brand-locked demand (top 5 brands take 100% of clicks) — rj19lm champion spark plug doesn't clear our bar today."
  "og:title": "rj19lm champion spark plug — Niche Verdict: Skip it (46/100) | Amazon United States - Flapen"
---

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# **rj19lm champion spark plug**

**Skip it**

Brand-locked demand (top 5 brands take 100% of clicks) — this niche doesn't clear our bar today.

Market size 49Growth 62Conversion 100Competition 10Returns 87Price range 54Avg price 34Brand share 0Review moat 59Quality gap 19

**Conversion**

**Incredible****21.6%**

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

**Returns**

**Great****1.4%**

return rate — above 6% kills the launch gate

**Growth**

**Good****+38.5%**

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

**Review moat**

**Good****1,146.2**

avg incumbent reviews — the moat a new listing must climb

**Price range**

**Good****$6.38–$24.96**

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

**Market size**

**Okay****$269K**

$269K/yr · 123K searches

**Avg price**

**Okay****$10.12**

avg listing price — sweet spot $15–$100

**Quality gap**

**Bad****4.7★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****88%**

top-5 click share — a locked-up shelf

**Brand share**

**Bad****100%**

top-5 brand share — brand-locked demand

## **Competition**

The top 5 products capture 88% of clicks — a locked-up shelf that new listings rarely crack.

**Brands**

**5 **—flat

**Sellers**

**67**

**Top-5 brand share**

**100%**

**Open market**

**0%**

- Champion49% - Briggs & Stratton26% - Powtol13% - Wetenex11% - AMICAREP1%

## **Product shelf**

Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.

0%10%$27K20%$54K30%$81K40%$108K101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

Beatable (≤4.3★) Contested Strong incumbent (>4.7★)

All 10 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Champion RJ19LM - La buja del motor](https://m.media-amazon.com/images/I/41HH0E1mjIL.jpg)**Champion RJ19LM - La buja del motor**Champion**$6.48**4.8★4,160 rev](https://www.amazon.com/dp/B003RJS3HI) [2![Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM RJ19LM 802592 5095K by Briggs & Stratton](https://m.media-amazon.com/images/I/51+vnwLEI3L.jpg)**Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM RJ19LM 802592 5095K by Briggs & Stratton**Briggs & Stratton**$7.32**4.7★1,555 rev](https://www.amazon.com/dp/B018WLL2KK) [3![Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)](https://m.media-amazon.com/images/I/31u6elWvGDL.jpg)**Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)**Powtol**$7.03**4.6★536 rev](https://www.amazon.com/dp/B08LVZXQ6J) [4![Champion J19LM-2pk Copper Plus Small Engine Spark Plug Stock # 861 (2 Pack)](https://m.media-amazon.com/images/I/31V0maFUUaL.jpg)**Champion J19LM-2pk Copper Plus Small Engine Spark Plug Stock # 861 (2 Pack)**Champion**$8.31**4.8★1,296 rev](https://www.amazon.com/dp/B00GG1DUPY) [5![RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK](https://m.media-amazon.com/images/I/41iysvtbDOL.jpg)**RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK**Wetenex**$8.11**4.7★172 rev](https://www.amazon.com/dp/B0DSVGLZR8)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![RJ19LM Spark Plugs for Champion J19LM NGK B2LM Bosch WR11E0 Denso W9LMR-US MTD 759-3338 Briggs and Stratton 796112S 802592 5095K Pack of 4](https://m.media-amazon.com/images/I/41YuakLbCSL.jpg)**RJ19LM Spark Plugs for Champion J19LM NGK B2LM Bosch WR11E0 Denso W9LMR-US MTD 759-3338 Briggs and Stratton 796112S 802592 5095K Pack of 4**AMICAREP**$10.75**17 rev10mo ago](https://www.amazon.com/dp/B0FMXMFLM7) [![RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK](https://m.media-amazon.com/images/I/41iysvtbDOL.jpg)**RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK**Wetenex**$8.11**172 rev1y ago](https://www.amazon.com/dp/B0DSVGLZR8) [![Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)](https://m.media-amazon.com/images/I/31u6elWvGDL.jpg)**Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)**Powtol**$7.03**536 rev5y ago](https://www.amazon.com/dp/B08LVZXQ6J) [![Champion RJ19LM Lawn & Garden Equipment Engine Spark Plug Genuine Original Equipment Manufacturer (OEM) Part](https://m.media-amazon.com/images/I/41QoSMPwoDL.jpg)**Champion RJ19LM Lawn & Garden Equipment Engine Spark Plug Genuine Original Equipment Manufacturer (OEM) Part**Champion**$6.38**2,090 rev7y ago](https://www.amazon.com/dp/B072YXZ3PF) [![Champion 2 Pack Genuine J19LM Spark Plug Copper Plus 861](https://m.media-amazon.com/images/I/41OQgT+y-+L.jpg)**Champion 2 Pack Genuine J19LM Spark Plug Copper Plus 861**Champion**$8.74**40 rev9y ago](https://www.amazon.com/dp/B07D5HK2ZP)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![Champion RJ19LM Lawn & Garden Equipment Engine Spark Plug Genuine Original Equipment Manufacturer (OEM) Part](https://m.media-amazon.com/images/I/41QoSMPwoDL.jpg)**Champion RJ19LM Lawn & Garden Equipment Engine Spark Plug Genuine Original Equipment Manufacturer (OEM) Part**Champion**$6.38**4.7★**▲ 80%**](https://www.amazon.com/dp/B072YXZ3PF) [![Champion RJ19LM - La buja del motor](https://m.media-amazon.com/images/I/41HH0E1mjIL.jpg)**Champion RJ19LM - La buja del motor**Champion**$6.48**4.8★**▲ 35%**](https://www.amazon.com/dp/B003RJS3HI) [![Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)](https://m.media-amazon.com/images/I/31u6elWvGDL.jpg)**Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)**Powtol**$7.03**4.6★**▲ 31%**](https://www.amazon.com/dp/B08LVZXQ6J) [![Champion 2 Pack Genuine J19LM Spark Plug Copper Plus 861](https://m.media-amazon.com/images/I/41OQgT+y-+L.jpg)**Champion 2 Pack Genuine J19LM Spark Plug Copper Plus 861**Champion**$8.74**4.8★**▲ 30%**](https://www.amazon.com/dp/B07D5HK2ZP) [![Briggs and Stratton 796112 Pack of 12 Spark Plugs (RJ19LM)](https://m.media-amazon.com/images/I/51BDzrp6-rL.jpg)**Briggs and Stratton 796112 Pack of 12 Spark Plugs (RJ19LM)**Briggs & Stratton**$24.96**4.7★**▲ 18%**](https://www.amazon.com/dp/B01MCX2JQ6)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 92 weeks — +38.5% search growth over the last 90 days.

5K4KSpike '24Spike '25Holiday '25Spike '26 seasonNovDecJanFebMarAprMayJunJulAugSepOctNovDecJanFebMarAprMayJun

Peak months: Mar, Apr, May · busiest ÷ quietest = 2.4×

## **Reviews**

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

### **What buyers love **

**Quality-Overall**21%

*“Excellent quality”*

**Advertised Vs Actual Product**20%

*“As Advertised”*

**Size-Overall**19%

*“Great fit”*

**Socket/Port/Plug**15%

*“Great Plug”*

**Value For Money**13%

*“Good for the price”*

**Durability**2%

*“the build quality feels durable”*

**Efficiency**1%

*“Worked perfectly”*

**Brightness/Shine/Glow**1%

*“Spark”*

**Assembly/Installation**1%

*“Installation was straightforward”*

**Design-Overall**1%

*“However, these looks amd feel solidly built so I'm sure they will work fine”*

### **What buyers complain about **

**Advertised Vs Actual Product**23%

*“Misleading”*

**Quality-Overall**18%

*“Cheap”*

**Functionality-Overall**14%

*“After installing in my lawnmower it would not run”*

**Size-Overall**9%

*“Did not fit my mower”*

**Certifications**9%

*“Dont always get qualified products”*

**Value For Money**9%

*“NOT a huge deal”*

**Maintenance And Repair**9%

*“Yearly maintenance item that needs replacement”*

**Cushion**5%

*“No cushion so plugs were banged up”*

### **Top return reasons **

**Size-Overall**62%

**Advertised Vs Actual Product**13%

**Defective Material/Parts**5%

**Functionality-Overall**5%

**Value For Money**4%

**Socket/Port/Plug**3%

**Compatibility-Overall**3%

**Assembly/Installation**1%

**Product Condition**1%

**Quality-Overall**1%