---
title: "ngk buhw-2 marine spark plugs — Niche Verdict: Worth a look (51/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/ngk-buhw-2-marine-spark-plugs"
last_updated: "2026-07-14T00:27:34.637Z"
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  description: "ngk buhw-2 marine spark plugs shows demand growing +198.7% this quarter, but a small market ($25K/yr) keeps it on the watch list."
  "og:description": "ngk buhw-2 marine spark plugs shows demand growing +198.7% this quarter, but a small market ($25K/yr) keeps it on the watch list."
  "og:title": "ngk buhw-2 marine spark plugs — Niche Verdict: Worth a look (51/100) | Amazon United States - Flapen"
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# **ngk buhw-2 marine spark plugs**

**Worth a look**

Shows demand growing +198.7% this quarter, but a small market ($25K/yr) keeps it on the watch list.

Market size 6Growth 97Conversion 54Competition 20Returns 96Price range 78Avg price 87Brand share 10Review moat 95Quality gap 33

**Growth**

**Incredible****+198.7%**

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

**Returns**

**Incredible****0.8%**

return rate — above 6% kills the launch gate

**Review moat**

**Incredible****92.31**

avg incumbent reviews — the moat a new listing must climb

**Avg price**

**Great****$19.62**

avg listing price — sweet spot $15–$100

**Price range**

**Great****$5.75–$49.87**

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

**Conversion**

**Good****4.5%**

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

**Quality gap**

**Okay****4.5★**

avg incumbent rating — lower means beatable quality

**Competition**

**Bad****76%**

top-5 click share — a locked-up shelf

**Brand share**

**Bad****96%**

top-5 brand share — brand-locked demand

**Market size**

**Bad****$25K**

$25K/yr · 28K searches

## **Competition**

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%**

**Open market**

**2%**

- TORCH27% - NGK24% - Quicksilver20% - OVERSTOCKDIRECT18% - PartsBlast8% - Champion2% - Open — no brand owns it (1 brand, 2%)

## **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%$2K20%$5K30%$7K40%$10K1101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 13 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![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](https://m.media-amazon.com/images/I/41gjOSpkmyL.jpg)**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**$6.94**4.4★90 rev](https://www.amazon.com/dp/B0B743Z3BJ) [2![Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack](https://m.media-amazon.com/images/I/31kIN7x4ITL.jpg)**Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack**Quicksilver**$8.41**4.6★341 rev](https://www.amazon.com/dp/B00N6D6MWI) [3![Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type](https://m.media-amazon.com/images/I/310arFvwTKL.jpg)**Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type**OVERSTOCKDIRECT**$31.47**4.9★28 rev](https://www.amazon.com/dp/B0FBSCC5QX) [4![NGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed](https://m.media-amazon.com/images/I/41JEL4oKFXL.jpg)**NGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed**NGK**$20.49**3.6★10 rev](https://www.amazon.com/dp/B00YMXAR5O) [5![UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2](https://m.media-amazon.com/images/I/31K-fSp8AxL.jpg)**UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2**PartsBlast**$49.87**4.8★4 rev](https://www.amazon.com/dp/B08RW3HCRK)

**~~View all top sellers →~~**

### **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](https://m.media-amazon.com/images/I/41Az2Gq5iBL.jpg)**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**$16.87**7 rev1y ago](https://www.amazon.com/dp/B0FCR7LTDP) [![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](https://m.media-amazon.com/images/I/41Az2Gq5iBL.jpg)**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**$12.06**70 rev1y ago](https://www.amazon.com/dp/B0FCQLNFJJ) [![Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type](https://m.media-amazon.com/images/I/310arFvwTKL.jpg)**Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type**OVERSTOCKDIRECT**$31.47**28 rev1y ago](https://www.amazon.com/dp/B0FBSCC5QX) [![Generic (6x) BU8H (6431) Non-Resistor Spark Plug Pre-Gapped Compatible With Mercury & Mariner BU8H-6PK-01](https://m.media-amazon.com/images/I/41FRWlcql7L.jpg)**Generic (6x) BU8H (6431) Non-Resistor Spark Plug Pre-Gapped Compatible With Mercury & Mariner BU8H-6PK-01**Generic**$29.41**10 rev2y ago](https://www.amazon.com/dp/B0D4C25VTN) [![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](https://m.media-amazon.com/images/I/41gjOSpkmyL.jpg)**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**$6.94**90 rev3y ago](https://www.amazon.com/dp/B0B743Z3BJ)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![NGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed](https://m.media-amazon.com/images/I/41JEL4oKFXL.jpg)**NGK BU8H Spark Plug Marine Outboard Motor (4 Pack) Boxed**NGK**$20.49**3.6★**▲ 76%**](https://www.amazon.com/dp/B00YMXAR5O) [![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](https://m.media-amazon.com/images/I/41Az2Gq5iBL.jpg)**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**$16.87**4.6★**▲ 59%**](https://www.amazon.com/dp/B0FCR7LTDP) [![UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2](https://m.media-amazon.com/images/I/31K-fSp8AxL.jpg)**UStoolsupply Replacement for NGK Standard Spark Plug # BUHW-2**PartsBlast**$49.87**4.8★**▲ 37%**](https://www.amazon.com/dp/B08RW3HCRK) [![Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack](https://m.media-amazon.com/images/I/31kIN7x4ITL.jpg)**Quicksilver 13686Q NGK BU8H Semi-Surface Discharge Spark Plug for Marine Outboard Engines 1 Pack**Quicksilver**$8.41**4.6★**▲ 19%**](https://www.amazon.com/dp/B00N6D6MWI) [![Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type](https://m.media-amazon.com/images/I/310arFvwTKL.jpg)**Genuine NGK BU8H Spark Plugs Non Resistor 6431 (6 Pack) Surface Discharge Type**OVERSTOCKDIRECT**$31.47**4.9★**▲ 18%**](https://www.amazon.com/dp/B0FBSCC5QX)

**~~View all trending →~~**

## **Reviews**

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

### **What buyers love **

**Advertised Vs Actual Product**35%

*“worked as expected”*

**Socket/Port/Plug**25%

*“Good Plugs”*

**Quality-Overall**25%

*“plugs quality excellent”*

**Motor Power**5%

*“Boat motor started right away”*

**Value For Money**5%

*“The price is excellent for item best deal for your buck”*

**Compatibility-Overall**5%

*“works great in my Mercury outboard, excellent quality”*

### **What buyers complain about **

**Advertised Vs Actual Product**50%

*“Picture hows 4 pack so its a rip off”*

**Rusts/Corrodes**25%

*“Rusty”*

**Water Resistance**25%

*“Not good for saltwater”*

### **Top return reasons **

**Functionality-Overall**24%

**Advertised Vs Actual Product**23%

**Size-Overall**18%

**Quality-Overall**8%

**Socket/Port/Plug**8%

**Defective Material/Parts**8%

**Compatibility-Overall**7%

**Shape/Style**4%

**Heating**2%