Is rc12yx champion spark plug profitable to sell on Amazon United States?

The niche generates $676K/yr across 16 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +83.8%. Flapen's verdict: Worth a look (57/100).

How competitive is the rc12yx champion spark plug niche?

8 brands and 74 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 96% of demand.

What do buyers complain about in rc12yx champion spark plug?

Top complaints mined from reviews: Socket/Port/Plug, Size-Overall, Quality-Overall. The return rate is 1.4%.

When does demand for rc12yx champion spark plug peak?

Demand peaks in Apr–May–Jun; the busiest month runs 43.0× the quietest.

What does it cost to enter the rc12yx champion spark plug niche?

Listings span $3.91–$58.51; the average listing price is $12.00 (sweet spot $15–$100). The average incumbent carries 1,631 reviews — the moat a new listing must climb.

rc12yx champion spark plug

Worth a look

Shows searches that convert (19.9% search→purchase), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Conversion

Incredible19.9%

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

Returns

Great1.4%

return rate — above 5% kills the launch gate

Growth

Great+83.8%

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

Price range

Great$3.91–$58.51

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

Market size

Good$676K

$676K/yr · 284K searches

Avg price

Good$12.00

avg listing price — sweet spot $15–$100

Review moat

Okay1,630.56

avg incumbent reviews — the moat a new listing must climb

Competition

Bad71%

top-5 click share — a locked-up shelf

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Brand share

Bad96%

top-5 brand share — brand-locked demand

According to Flapen's Amazon United States niche tracking, rc12yx champion spark plug is a $676K/yr Amazon United States market (284K searches/yr). The top 5 brands hold 96% of demand. Demand peaks in Apr–May–Jun. Verdict: Worth a look — 57/100.

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

rc12yx champion spark plug market data

Units sold / yr: 50K–60K; avg 3,000–4,000/product
Revenue / yr: $600K–$720K; units × avg price
Conversion rate: 19.9%
Avg BSR: #82
Page quality: 0%
Prime: 100%
Sponsored: 75%
Out of stock: 0.0%
Avg brand age: 48 months
Avg seller age: 168 days

Competition & brand share

The top 5 products capture 71% of clicks — a locked-up shelf that new listings rarely crack.

Brands

8 rising

Sellers

Top-5 brand share

96%

Top 20: 100%

Top-5 click share

71%

Top 20: 100%

Open market

Champion67%
Wetenex9%
Harbot9%
Butom8%
JSIERLUOV3%
Briggs & Stratton2%
Open — no brand owns it (2 brands, 3%)

Demand & seasonality

Weekly Amazon search volume, last 104 weeks — +83.8% search growth over the last 90 days.

Peak months: Apr, May, Jun · busiest ÷ quietest = 43.0×

Open Trend

Top rc12yx champion spark plug search terms

rc12yc spark plugs70K/yr +96.3%16.7% conv.
champion rc12yc50K/yr +107.4%19.5% conv.
rc12yc43K/yr +77.3%14.9% conv.
rc12yc champion spark plug27K/yr +94.9%19.3% conv.
champion rc12yc spark plugs25K/yr +77.4%20.1% conv.
rc12yc spark plug15K/yr +69.0%11.8% conv.
champion spark plug rc12yc13K/yr +44.4%19.0% conv.
spark plug rc12yc10K/yr +86.6%16.2% conv.
champion rc12yc spark plug8K/yr +91.0%15.1% conv.
champion rc12yc spark plugs 2 pack5K/yr +79.6%25.2% conv.

All search terms

Top rc12yx 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 16 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Champion Spark Plug for Craftsman (2 Pack) # 71G RC12YC-2pk

Champion$8.654.7★3,614 rev

(Pack of 2) Champion Spark Plugs for John Deere M78543 M87543 RC12YC Engine

Champion$8.664.8★1,263 rev

Wetenex RC12YC Spark Plug for Brigg 491055T 491055S 491055 692051 792015 kohler 12 132 02-S Champion RC12YC Spark Plug (2 PACK)

Wetenex$7.734.6★265 rev

GENUINE CHAMPION SPARK PLUGS - RC12YC SPARK PLUG (PREM PLUG IS 2071) 515312

Champion$9.464.7★317 rev

Harbot RC12YC Spark Plug for BS 491055 491055S 491055T 792015 692051 694385 759-3336 John Deere M78543 M87543 Kohler 12 132 02 (Pack of 2)

Harbot$7.284.7★990 rev

Newest

by launch date

JSIERLUOV RC12YC BKR5E Spark Plugs for MTD 759-3336 Champion Briggs 491055S 692051 792015 kohler 12 132 02-S John Deere M78543 M8754 Autolite 3924 Spark Plug (4 Pack)

JSIERLUOV$8.9136 rev

5mo ago

2 Pack RC12YC Spark Plug for Briggs and Stratton 491055S 491055T 491055 692051 792015 for Kohler 12 132 02-S for Champion RC12YC Spark Plugs

YUEARN$7.6082 rev

1y ago

Wetenex RC12YC Spark Plug for Brigg 491055T 491055S 491055 692051 792015 kohler 12 132 02-S Champion RC12YC Spark Plug (2 PACK)

Wetenex$7.73265 rev

1y ago

(Pack of 2) Champion Spark Plugs for John Deere M78543 M87543 RC12YC Engine

Champion$8.661,263 rev

5y ago

RC12YC Spark Plug for BS 491055 491055S 692051 792015 5066 Kohler 25 132 12-S M78543Pack of 4

Butom$9.391,300 rev

8y ago

What buyers say about rc12yx champion spark plug

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

What buyers love

Quality-Overall19%

“Very good quality arrived on time as described”

Socket/Port/Plug17%

“Plugs work well”

Advertised Vs Actual Product16%

“As advertised”

Value For Money16%

“Good price”

Size-Overall16%

“Correct size”

Efficiency3%

“Works perfectly”

Assembly/Installation3%

“Easy to install”

Correct Contents2%

“This is the exact replacement item”

Motor Power2%

“Solid replacement parts for small motors”

Brightness/Shine/Glow1%

“Sparky”

What buyers complain about

Socket/Port/Plug16%

“Horrible spark plugs”

Size-Overall11%

“are a smidge too long”

Quality-Overall11%

“Junk”

Advertised Vs Actual Product11%

“Didn't read the full description”

Value For Money11%

“Spark plugs, just expensive”

Flammable8%

“known to cause backfires in generators”

Natural Resource Wastage5%

“Total waste of money”

Product Condition5%

“One was used”

Durability5%

“Mower is dead after installation”

Drop/Impact Protection5%

“No protection”

Top return reasons

Size-Overall49%

Advertised Vs Actual Product19%

Defective Material/Parts7%

Compatibility-Overall7%

Value For Money4%

Functionality-Overall3%

Socket/Port/Plug3%

Quality-Overall1%

Product Condition1%

Motor Issues1%

Common questions

Is rc12yx champion spark plug profitable to sell on Amazon United States?: The niche generates $676K/yr across 16 tracked products. 0 of 1 products launched in the last 360 days are still selling. 90-day search growth is +83.8%. Flapen's verdict: Worth a look (57/100).
How competitive is the rc12yx champion spark plug niche?: 8 brands and 74 sellers compete. The top 5 products take 71% of clicks and top 5 brands hold 96% of demand.
What do buyers complain about in rc12yx champion spark plug?: Top complaints mined from reviews: Socket/Port/Plug, Size-Overall, Quality-Overall. The return rate is 1.4%.
When does demand for rc12yx champion spark plug peak?: Demand peaks in Apr–May–Jun; the busiest month runs 43.0× the quietest.
What does it cost to enter the rc12yx champion spark plug niche?: Listings span $3.91–$58.51; the average listing price is $12.00 (sweet spot $15–$100). The average incumbent carries 1,631 reviews — the moat a new listing must climb.