Is lawn mower spark plug profitable to sell on Amazon United States?

The niche generates $51K/yr across 11 tracked products. 90-day search growth is +76.6%. Flapen's verdict: Skip it (44/100).

How competitive is the lawn mower spark plug niche?

9 brands and 40 sellers compete. The top 5 products take 84% of clicks and top 5 brands hold 90% of demand.

What do buyers complain about in lawn mower spark plug?

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

What does it cost to enter the lawn mower spark plug niche?

Listings span $3.97–$18.82; the average listing price is $8.47 (sweet spot $15–$100). The average incumbent carries 926 reviews — the moat a new listing must climb.

lawn mower spark plug

Skip it

A small market ($51K/yr) — this niche doesn't clear our bar today.

Returns

Great1.4%

return rate — above 5% kills the launch gate

Conversion

Great9.6%

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

Growth

Great+76.6%

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

Review moat

Good925.91

avg incumbent reviews — the moat a new listing must climb

Price range

Okay$3.97–$18.82

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

Brand share

Okay90%

top-5 brand share — brands hold most of the demand

Avg price

Bad$8.47

avg listing price — sweet spot $15–$100

Quality gap

Bad4.7★

avg incumbent rating — lower means beatable quality

Competition

Bad84%

top-5 click share — a locked-up shelf

Market size

Bad$51K

$51K/yr · 63K searches

According to Flapen's Amazon United States niche tracking, lawn mower spark plug is a $51K/yr Amazon United States market (63K searches/yr). The top 5 brands hold 90% of demand. Verdict: Skip it — 44/100.

Data updated Jul 16, 2026 · scored weekly · How we score niches

lawn mower spark plug market data

Units sold / yr: 5K–6K; avg 500–750/product
Revenue / yr: $42K–$51K; units × avg price
Conversion rate: 9.6%
Avg BSR: #60
Page quality: 0%
Prime: 91%
Sponsored: 82%
Out of stock: 0.0%
Avg brand age: 46 months
Avg seller age: 166 days

Competition & brand share

The top 5 products capture 84% of clicks — a locked-up shelf that new listings rarely crack.

Brands

9 falling

Sellers

Top-5 brand share

90%

Top 20: 100%

Top-5 click share

84%

Top 20: 100%

Open market

Briggs & Stratton68%
KELKONG7%
Tecreddy6%
Harbot4%
Autolite Iridium Ultra4%
Butom3%
Open — no brand owns it (3 brands, 7%)

Demand

Weekly Amazon search volume, last 11 weeks — +76.6% search growth over the last 90 days.

Open Trend

Top lawn mower spark plug search terms

lawn mower spark plug18K/yr +113.9%4.6% conv.
briggs and stratton spark plug13K/yr +66.3%6.3% conv.
lawnmower spark plug7K/yr +89.8%4.4% conv.
491055s4K/yr +69.4%17.8% conv.
lawn mower spark plugs4K/yr +58.1%3.7% conv.
spark plug for lawn mower4K/yr +98.7%3.4% conv.
491055s spark plug briggs and stratton3K/yr +51.7%24.4% conv.
small engine spark plugs5K/yr +17.3%1.9% conv.
spark plug for briggs and stratton2K/yr +64.4%4.7% conv.
491055s spark plug2K/yr +33.9%22.4% conv.

All search terms

Top lawn mower 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 11 tracked products in this niche — three views at once, no toggling.

Top sellers

by 90-day click share

Briggs & Stratton 491055S - 2 Pack

Briggs & Stratton$6.754.7★2,944 rev

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

Briggs & Stratton$7.304.7★1,562 rev

593260 Air Filter with Pre Filter and Spark Plug Fits for B&S 725EX 625EX 575EX 550EX 525EXI Engines Air Filter Parts for Toro Recycler 22 and Troy Bilt Lawn Mower

KELKONG$8.044.7★491 rev

RC12YC Spark Plugs Compatible with Champion Briggs and Stratton 491055 491055S 692051 792015 491055T 5066 Kohler 25 132 12-S JD M78543 531308128 Lawn Mower Engine

Tecreddy$10.004.6★299 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★1,004 rev

Newest

by launch date

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

Wetenex$7.73272 rev

1y ago

593260 Air Filter with Pre Filter and Spark Plug Fits for B&S 725EX 625EX 575EX 550EX 525EXI Engines Air Filter Parts for Toro Recycler 22 and Troy Bilt Lawn Mower

KELKONG$8.04491 rev

2y ago

RC12YC Spark Plugs Compatible with Champion Briggs and Stratton 491055 491055S 692051 792015 491055T 5066 Kohler 25 132 12-S JD M78543 531308128 Lawn Mower Engine

Tecreddy$10.00299 rev

2y ago

RC12YC Spark Plug 491055 (Pack of 10) Fit for Briggs & Stratton Spark Plug Replace 491055S 491055T 72347GS 72347 805015 M78543

YIGUCS$18.8277 rev

3y ago

OEM (Pack of 2) Champion Spark Plugs for Briggs & Stratton 491055 491055S 491055T

Champion$9.12252 rev

5y ago

What buyers say about lawn mower spark plug

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

What buyers love

Quality-Overall21%

“Great and easy transaction and quality is great”

Size-Overall20%

“Exact fit”

Socket/Port/Plug15%

“Plugs work great”

Advertised Vs Actual Product15%

“As Advertised”

Value For Money14%

“Good price”

Assembly/Installation3%

“Easy install”

Filtration3%

“Great filter at great price”

Efficiency2%

“it does run fine”

Maintenance And Repair2%

“Solid value for a simple maintenance item”

Motor Power1%

“My old Briggs motor purrs”

What buyers complain about

Quality-Overall15%

“Cheap”

Socket/Port/Plug15%

“Horrible spark plugs”

Advertised Vs Actual Product13%

“Didn't read the full description”

Size-Overall10%

“Did not fit my mower”

Functionality-Overall8%

“After installing in my lawnmower it would not run”

Maintenance And Repair7%

“That makes maintenance frustrating”

Drop/Impact Protection5%

“No protection”

Value For Money5%

“Spark plugs, just expensive”

Natural Resource Wastage5%

“Total waste of money”

Product Condition3%

“The items are now being used weekly”

Top return reasons

Size-Overall60%

Advertised Vs Actual Product16%

Functionality-Overall5%

Defective Material/Parts4%

Value For Money4%

Compatibility-Overall3%