ngk buhw-2 marine spark plugs
Worth a lookShows demand growing +198.7% this quarter, but a small market ($25K/yr) keeps it on the watch list.
Growth
Incredible+198.7%90-day search growth — must beat 0% to launch
Returns
Incredible0.8%return rate — above 5% kills the launch gate
Review moat
Incredible92.31avg incumbent reviews — the moat a new listing must climb
Avg price
Great$19.62avg listing price — sweet spot $15–$100
Price range
Great$5.75–$49.87cheapest to priciest tracked listing — scored on the share inside $15–$100
Conversion
Good4.5%search→purchase rate — share of searches ending in a sale
Quality gap
Okay4.5★avg incumbent rating — lower means beatable quality
Competition
Bad76%top-5 click share — a locked-up shelf
Brand share
Bad96%top-5 brand share — brand-locked demand
Market size
Bad$25K$25K/yr · 28K searches
According to Flapen's Amazon United States niche tracking, ngk buhw-2 marine spark plugs is a $25K/yr Amazon United States market (28K searches/yr). The top 5 brands hold 96% of demand. Verdict: Worth a look — 51/100.
Data updated Jul 11, 2026 · scored weekly · How we score niches
ngk buhw-2 marine spark plugs market data
- Units sold / yr
- 3K–4K
- avg 100–250/product
- Revenue / yr
- $59K–$78K
- units × avg price
- Conversion rate
- 4.5%
- Avg BSR
- #1,485
- Page quality
- 0%
- Prime
- 77%
- Sponsored
- 31%
- Out of stock
- 12.5%
- Avg brand age
- 52 months
- Avg seller age
- 174 days
Competition & brand share
The top 5 products capture 76% of clicks — a locked-up shelf that new listings rarely crack.Brands
7 falling
Sellers
42
Top-5 brand share
96%
Top 20: 100%
Top-5 click share
76%
Top 20: 100%
Open market
2%
- TORCH27%
- NGK24%
- Quicksilver20%
- OVERSTOCKDIRECT18%
- PartsBlast8%
- Champion2%
- Open — no brand owns it (1 brand, 2%)
Top ngk buhw-2 marine spark plugs search terms
- ngk buhw-2 marine spark plugs7K/yr
- buhw-2 spark plugs7K/yr
- ngk buhw5K/yr
- ngk buhw-25K/yr
- ngk bu8h4K/yr
Top ngk buhw-2 marine spark plugs 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.
All 13 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
TORCH E9Y-13 Marine Boat Spark Plug Replace for Autolite 2852 for NGK BUHW 2622 BU8H 6431 Spark Plug for Denso 6001 for Champion QL76V 1 PCS
TORCH$6.944.4★90 rev
Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack
Quicksilver$8.414.6★341 rev
Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type
OVERSTOCKDIRECT$31.474.9★28 rev
NGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed
NGK$20.493.6★10 rev
UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2
PartsBlast$49.874.8★4 rev
Newest
by launch date
TORCH E9Y-13 Marine Boat Spark Plug Replace for Autolite 2852 for NGK BUHW 2622 BU8H 6431 Spark Plug for Denso 6001 for Champion QL76V 4 PCS
TORCH$16.877 rev
TORCH E9Y-13 Marine Boat Spark Plug Replace for Autolite 2852 for NGK BUHW 2622 BU8H 6431 Spark Plug for Denso 6001 for Champion QL76V 2 PCS
TORCH$12.0670 rev
Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type
OVERSTOCKDIRECT$31.4728 rev
Generic (6x) BU8H (6431) Non-Resistor Spark Plug Pre-Gapped Compatible With Mercury & Mariner BU8H-6PK-01
Generic$29.4110 rev
TORCH E9Y-13 Marine Boat Spark Plug Replace for Autolite 2852 for NGK BUHW 2622 BU8H 6431 Spark Plug for Denso 6001 for Champion QL76V 1 PCS
TORCH$6.9490 rev
Trending
90-day click momentumNGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed
NGK$20.493.6★
TORCH E9Y-13 Marine Boat Spark Plug Replace for Autolite 2852 for NGK BUHW 2622 BU8H 6431 Spark Plug for Denso 6001 for Champion QL76V 4 PCS
TORCH$16.874.6★
UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2
PartsBlast$49.874.8★
Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack
Quicksilver$8.414.6★
Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type
OVERSTOCKDIRECT$31.474.9★
What buyers say about ngk buhw-2 marine spark plugs
What buyers praise and complain about, mined from review topics.What buyers love
“worked as expected”
“Good Plugs”
“plugs quality excellent”
“Boat motor started right away”
“The price is excellent for item best deal for your buck”
“works great in my Mercury outboard, excellent quality”
What buyers complain about
“Picture hows 4 pack so its a rip off”
“Rusty”
“Not good for saltwater”
Top return reasons
Common questions
- Is ngk buhw-2 marine spark plugs profitable to sell on Amazon United States?
- The niche generates $25K/yr across 13 tracked products. 90-day search growth is +198.7%. Flapen's verdict: Worth a look (51/100).
- How competitive is the ngk buhw-2 marine spark plugs niche?
- 7 brands and 42 sellers compete. The top 5 products take 76% of clicks and top 5 brands hold 96% of demand.
- What do buyers complain about in ngk buhw-2 marine spark plugs?
- Top complaints mined from reviews: Advertised Vs Actual Product, Rusts/Corrodes, Water Resistance. The return rate is 0.8%.
- What does it cost to enter the ngk buhw-2 marine spark plugs niche?
- Listings span $5.75–$49.87; the average listing price is $19.62 (sweet spot $15–$100). The average incumbent carries 92 reviews — the moat a new listing must climb.