---
title: "fuel water separator marine — Niche Verdict: Worth a look (64/100) | Amazon United States - Flapen"
canonical_url: "https://flapen.com/amazon/research/us/automotive/fuel-water-separator-marine"
last_updated: "2026-07-14T03:01:32.804Z"
locale: en
meta:
  description: "fuel water separator marine shows a sweet-spot price point ($22.04 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list."
  "og:description": "fuel water separator marine shows a sweet-spot price point ($22.04 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list."
  "og:title": "fuel water separator marine — Niche Verdict: Worth a look (64/100) | Amazon United States - Flapen"
---

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# **fuel water separator marine**

**Worth a look**

Shows a sweet-spot price point ($22.04 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.

Market size 46Growth 78Conversion 62Competition 58Returns 91Price range 82Avg price 93Brand share 56Review moat 73Quality gap 32

**Avg price**

**Great****$22.04**

avg listing price — sweet spot $15–$100

**Returns**

**Great****1.2%**

return rate — above 6% kills the launch gate

**Price range**

**Great****$7.30–$55.50**

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

**Growth**

**Great****+66.6%**

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

**Review moat**

**Good****594.22**

avg incumbent reviews — the moat a new listing must climb

**Conversion**

**Good****5.5%**

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

**Competition**

**Good****50%**

top-5 click share — leaders hold, buyers still browse

**Brand share**

**Good****72%**

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

**Market size**

**Okay****$246K**

$246K/yr · 204K searches

**Quality gap**

**Okay****4.6★**

avg incumbent rating — lower means beatable quality

## **Competition**

The top 5 products take 50% of clicks — established leaders, but buyers still shop beyond them.

**Brands**

**24 **▲rising

**Sellers**

**139**

**Top-5 brand share**

**72%**

**Open market**

**24%**

- TRSCJXN20% - Quicksilver19% - CARMOCAR15% - attwood13% - Sierra5% - ATRACYPART4%

## **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%4%$10K8%$20K12%$30K16%$39K1101001K10K Reviews — right = deep review moatMarket share (90d) ≈ est. sales

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

All 36 tracked products in this niche — three views at once, no toggling.

### **Top sellers**

by 90-day click share

[1![Quicksilver 802893Q01 Water Separating Fuel Filter for Mercury and Mariner Outboards MerCruiser Sterndrive and Inboard Engines](https://m.media-amazon.com/images/I/41tJLIAdmZL.jpg)**Quicksilver 802893Q01 Water Separating Fuel Filter for Mercury and Mariner Outboards MerCruiser Sterndrive and Inboard Engines**Quicksilver**$14.08**4.8★4,370 rev](https://www.amazon.com/dp/B001HBX3IC) [2![S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/417jXBNrpWL.jpg)**S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097**TRSCJXN**$24.32**4.6★51 rev](https://www.amazon.com/dp/B0FQTNXPWP) [3![CARMOCAR Fuel Filter Water Separator replacement for Marine Outboard Motor Mercury with 3/8 Barb x 1/4 NPT brass Fittings Replaces# S3213 S3214 35-60494-1 S3213 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/41OdxfVrIdL.jpg)**CARMOCAR Fuel Filter Water Separator replacement for Marine Outboard Motor Mercury with 3/8 Barb x 1/4 NPT brass Fittings Replaces# S3213 S3214 35-60494-1 S3213 18-7932-1 18-17928 35-809097**CARMOCAR**$30.14**4.4★580 rev](https://www.amazon.com/dp/B075TZQ8LD) [4![Attwood 11840-7 Universal 10-Micron Marine Fuel/Water Separator Kit Includes Bracket & Brass Fittings Replaces Mercury 35-60494A4 For 2 & 4 Cycle Engines](https://m.media-amazon.com/images/I/31IvbHQy3CL.jpg)**Attwood 11840-7 Universal 10-Micron Marine Fuel/Water Separator Kit Includes Bracket & Brass Fittings Replaces Mercury 35-60494A4 For 2 & 4 Cycle Engines**attwood**$23.14**4.6★175 rev](https://www.amazon.com/dp/B001O0D6EM) [5![R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs](https://m.media-amazon.com/images/I/411zHhOgagL.jpg)**R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs**TRSCJXN**$18.55**4.6★55 rev](https://www.amazon.com/dp/B0FQTH3XQP)

**~~View all top sellers →~~**

### **Newest**

by launch date

[![S3213 Marine Fuel Water Separator Filter Assembly with Clear Bowl 3/8 Inch NPT Port Compatible with Yamaha and for Mercury Outboard Motors Replaces 35-60494-1 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/41Snreog0hL.jpg)**S3213 Marine Fuel Water Separator Filter Assembly with Clear Bowl 3/8 Inch NPT Port Compatible with Yamaha and for Mercury Outboard Motors Replaces 35-60494-1 18-7932-1 18-17928 35-809097**TRSCJXN**$17.32**1 rev4w ago](https://www.amazon.com/dp/B0GZT26PWP) [![S3213 Fuel Water Separator Filter with Clear Bowl: 10 Micron Marine Fuel Filter Compatible with Yamaha/Mercury/Suzuki/Racor. Replaces 35-60494-1 18-7932-1. Installation Kit Screws Fittings & Clamps](https://m.media-amazon.com/images/I/51fseCb+XGL.jpg)**S3213 Fuel Water Separator Filter with Clear Bowl: 10 Micron Marine Fuel Filter Compatible with Yamaha/Mercury/Suzuki/Racor. Replaces 35-60494-1 18-7932-1. Installation Kit Screws Fittings & Clamps**SURGLA**$26.05**25 rev5mo ago](https://www.amazon.com/dp/B0GKG8MBG2) [![R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs](https://m.media-amazon.com/images/I/411zHhOgagL.jpg)**R12T Marine Fuel Water Separator Filter Kit 10 Micron Replacement for S3240 120AT 18-7987 NPT ZG1/4-19 Fits Gasoline and Diesel Outboard Engines Includes 2 Fittings and 2 Plugs**TRSCJXN**$18.55**55 rev8mo ago](https://www.amazon.com/dp/B0FQTH3XQP) [![S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/417jXBNrpWL.jpg)**S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097**TRSCJXN**$24.32**51 rev8mo ago](https://www.amazon.com/dp/B0FQTNXPWP) [![35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)](https://m.media-amazon.com/images/I/31Ouk2XFQCL.jpg)**35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)**Kefly**$19.90**5 rev10mo ago](https://www.amazon.com/dp/B0FPWNJQNV)

**~~View all new products →~~**

### **Trending**

90-day click momentum

[![S3213 Marine Fuel Water Separator Filter Assembly with Clear Bowl 3/8 Inch NPT Port Compatible with Yamaha and for Mercury Outboard Motors Replaces 35-60494-1 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/41Snreog0hL.jpg)**S3213 Marine Fuel Water Separator Filter Assembly with Clear Bowl 3/8 Inch NPT Port Compatible with Yamaha and for Mercury Outboard Motors Replaces 35-60494-1 18-7932-1 18-17928 35-809097**TRSCJXN**$17.32**5.0★**▲ 176%**](https://www.amazon.com/dp/B0GZT26PWP) [![CHIYING S3213 Fuel Water Separator Marine Kit 10 Micron Filter with Clear Bowl 3/8 Barb x 1/4 NPT Brass Fittings Compatible with Yamaha Mercury Racor Sierra Suzuki Outboard Replaces 35-60494-1](https://m.media-amazon.com/images/I/41ZNw+k1RyL.jpg)**CHIYING S3213 Fuel Water Separator Marine Kit 10 Micron Filter with Clear Bowl 3/8 Barb x 1/4 NPT Brass Fittings Compatible with Yamaha Mercury Racor Sierra Suzuki Outboard Replaces 35-60494-1**chiying**$24.74**4.4★**▲ 159%**](https://www.amazon.com/dp/B0FBWNJNCQ) [![35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)](https://m.media-amazon.com/images/I/31Ouk2XFQCL.jpg)**35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)**Kefly**$19.90**5.0★**▲ 127%**](https://www.amazon.com/dp/B0FPWNJQNV) [![S3213 Fuel Water Separator Filter with Clear Bowl: 10 Micron Marine Fuel Filter Compatible with Yamaha/Mercury/Suzuki/Racor. Replaces 35-60494-1 18-7932-1. Installation Kit Screws Fittings & Clamps](https://m.media-amazon.com/images/I/51fseCb+XGL.jpg)**S3213 Fuel Water Separator Filter with Clear Bowl: 10 Micron Marine Fuel Filter Compatible with Yamaha/Mercury/Suzuki/Racor. Replaces 35-60494-1 18-7932-1. Installation Kit Screws Fittings & Clamps**SURGLA**$26.05**4.3★**▲ 125%**](https://www.amazon.com/dp/B0GKG8MBG2) [![S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097](https://m.media-amazon.com/images/I/417jXBNrpWL.jpg)**S3213 Fuel Water Separator Marine Kit Compatible with Yamaha and for Mercury Marine Outboard Motor with 3/8 Barb x 1/4 NPT Brass Fittings Replaces B32013 35-60494-1 18-7932-1 18-17928 35-809097**TRSCJXN**$24.32**4.6★**▲ 101%**](https://www.amazon.com/dp/B0FQTNXPWP)

**~~View all trending →~~**

## **Demand & seasonality**

Weekly Amazon search volume, last 104 weeks — +66.6% search growth over the last 90 days.

5K3KSpike '25Spike '26 seasonSepDecMarJunAugNovMarMay

Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×

## **Reviews**

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

### **What buyers love **

**Quality-Overall**23%

*“Build quality feels solid”*

**Size-Overall**12%

*“Fit perfectly”*

**Advertised Vs Actual Product**11%

*“As advertised”*

**Value For Money**10%

*“Definitely worth the money”*

**Filtration**10%

*“Good filter”*

**Assembly/Installation**8%

*“Easy to mount”*

**Efficiency**3%

*“Works good”*

**Leak-Proof**2%

*“Nothing is leaking”*

**Maintenance And Repair**2%

*“Easy replacement for my mercury 4 stroke”*

**Ease Of Use**2%

*“Easy Peasy”*

### **What buyers complain about **

**Leak-Proof**26%

*“Leaks”*

**Filtration**13%

*“nor allow carb filter to fail”*

**Size-Overall**10%

*“Short Scres”*

**Quality-Overall**10%

*“Not sure if defect in housing or just poor quality”*

**Durability**4%

*“Didn't last a month”*

**Value For Money**2%

*“They are spendy for what it is”*

**Water Resistance**2%

*“For some reason it doesnt separate the water”*

**Metal Quality**2%

*“Metal shavings”*

**Material Quality**2%

*“Not reliable plastic”*

**Rusts/Corrodes**2%

*“Does not last I get corroded”*

### **Top return reasons **

**Size-Overall**55%

**Compatibility-Overall**10%

**Advertised Vs Actual Product**7%

**Filtration**5%

**Leak-Proof**5%

**Defective Material/Parts**5%

**Value For Money**2%

**Functionality-Overall**2%

**Assembly/Installation**2%

**Quality-Overall**2%