Is rj19lm champion spark plug profitable to sell on Amazon United States?

The niche generates $269K/yr across 10 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +38.5%. Flapen's verdict: Skip it (46/100).

How competitive is the rj19lm champion spark plug niche?

5 brands and 67 sellers compete. The top 5 products take 88% of clicks and top 5 brands hold 100% of demand.

What do buyers complain about in rj19lm champion spark plug?

Top complaints mined from reviews: Advertised Vs Actual Product, Quality-Overall, Functionality-Overall. The return rate is 1.4%.

When does demand for rj19lm champion spark plug peak?

Demand peaks in Mar–Apr–May; the busiest month runs 2.4× the quietest.

What does it cost to enter the rj19lm champion spark plug niche?

Listings span $6.38–$24.96; the average listing price is $10.12 (sweet spot $15–$100). The average incumbent carries 1,146 reviews — the moat a new listing must climb.

rj19lm champion spark plug

Skip it

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

Conversion

Incredible21.6%

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

Returns

Great1.4%

return rate — above 5% kills the launch gate

Growth

Good+38.5%

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

Review moat

Good1,146.2

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

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad88%

top-5 click share — a locked-up shelf

Brand share

Bad100%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, rj19lm champion spark plug is a $269K/yr Amazon United States market (123K searches/yr). The top 5 brands hold 100% of demand. Demand peaks in Mar–Apr–May. Verdict: Skip it — 46/100.

Data updated Jul 11, 2026 · scored weekly · How we score niches

rj19lm champion spark plug market data

Units sold / yr: 25K–30K; avg 1,500–2,000/product
Revenue / yr: $253K–$304K; units × avg price
Conversion rate: 21.6%
Avg BSR: #181
Page quality: 0%
Prime: 100%
Sponsored: 70%
Out of stock: 0.0%
Avg brand age: 66 months
Avg seller age: 176 days

Competition & brand share

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

Brands

5 flat

Sellers

Top-5 brand share

100%

Top 20: 100%

Top-5 click share

88%

Top 20: 100%

Open market

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

Demand & seasonality

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

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

Open Trend

Top rj19lm champion spark plug search terms

champion rj19lm spark plug24K/yr +43.7%17.6% conv.
rj19lm champion spark plug25K/yr +37.4%21.8% conv.
rj19lm16K/yr +31.5%16.2% conv.
champion rj19lm13K/yr +33.0%21.9% conv.
j19lm champion spark plug8K/yr +89.7%18.8% conv.
rj19lm spark plug13K/yr +28.3%15.1% conv.
j19lm spark plug7K/yr +12.5%15.5% conv.
spark plug rj19lm4K/yr +25.5%23.0% conv.
champion j19lm spark plug4K/yr +36.3%23.8% conv.
champion spark plug rj19lm4K/yr +27.0%23.7% conv.

All search terms

Top rj19lm champion 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.

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

Champion RJ19LM - La buja del motor

Champion$6.484.8★4,160 rev

Briggs & Stratton 796112-2pk Spark Plug (2 Pack) Replaces J19LM RJ19LM 802592 5095K by Briggs & Stratton

Briggs & Stratton$7.324.7★1,555 rev

Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)

Powtol$7.034.6★536 rev

Champion J19LM-2pk Copper Plus Small Engine Spark Plug Stock # 861 (2 Pack)

Champion$8.314.8★1,296 rev

RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK

Wetenex$8.114.7★172 rev

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

AMICAREP$10.7517 rev

10mo ago

RJ19LM Spark Plug for Champion RJ19LM J19LM Brigs Straton 796112 796112S 802592 5095K NGK B2LM Spark Plug 2 PACK

Wetenex$8.11172 rev

1y ago

Powtol RJ19LM Spark Plug for Champion J19LM Brigs Straton 796112 802592 5095K (Pack of 2)

Powtol$7.03536 rev

5y ago

Champion RJ19LM Lawn & Garden Equipment Engine Spark Plug Genuine Original Equipment Manufacturer (OEM) Part

Champion$6.382,090 rev

7y ago

Champion 2 Pack Genuine J19LM Spark Plug Copper Plus 861

Champion$8.7440 rev

9y ago

What buyers say about rj19lm champion spark plug

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

What buyers love

Quality-Overall21%

“Excellent quality”

Advertised Vs Actual Product20%

“As Advertised”

Size-Overall19%

“Great fit”

Socket/Port/Plug15%

“Great Plug”

Value For Money13%

“Good for the price”

Durability2%

“the build quality feels durable”

Efficiency1%

“Worked perfectly”

Brightness/Shine/Glow1%

“Spark”

Assembly/Installation1%

“Installation was straightforward”

Design-Overall1%

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

What buyers complain about

Advertised Vs Actual Product23%

“Misleading”

Quality-Overall18%

“Cheap”

Functionality-Overall14%

“After installing in my lawnmower it would not run”

Size-Overall9%

“Did not fit my mower”

Certifications9%

“Dont always get qualified products”

Value For Money9%

“NOT a huge deal”

Maintenance And Repair9%

“Yearly maintenance item that needs replacement”

Cushion5%

“No cushion so plugs were banged up”

Top return reasons

Size-Overall62%

Advertised Vs Actual Product13%

Defective Material/Parts5%

Functionality-Overall5%

Value For Money4%

Socket/Port/Plug3%

Compatibility-Overall3%