fuel water separator marine
Worth a lookShows a sweet-spot price point ($22.04 avg), but a failed launch gate (market size, growth, or returns) keeps it on the watch list.
Avg price
Great$22.04avg listing price — sweet spot $15–$100
Returns
Great1.2%return rate — above 6% kills the launch gate
Price range
Great$7.30–$55.50cheapest 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
Good594.22avg incumbent reviews — the moat a new listing must climb
Conversion
Good5.5%search→purchase rate — share of searches ending in a sale
Competition
Good50%top-5 click share — leaders hold, buyers still browse
Brand share
Good72%top-5 brand share — brands hold most of the demand
Market size
Okay$246K$246K/yr · 204K searches
Quality gap
Okay4.6★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.
All 36 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
Quicksilver 802893Q01 Water Separating Fuel Filter for Mercury and Mariner Outboards MerCruiser Sterndrive and Inboard Engines
Quicksilver$14.084.8★4,370 rev
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$24.324.6★51 rev
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$30.144.4★580 rev
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$23.144.6★175 rev
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$18.554.6★55 rev
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
TRSCJXN$17.321 rev
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$26.0525 rev
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$18.5555 rev
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$24.3251 rev
35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)
Kefly$19.905 rev
Trending
90-day click momentumS3213 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$17.325.0★
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$24.744.4★
35-802893Q01 Water Separating Fuel Filter Compatible with Mercury Mariner Outboards MerCruiser Sterndrive & Inboard Engines (2 PCS)
Kefly$19.905.0★
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$26.054.3★
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$24.324.6★
Demand & seasonality
Weekly Amazon search volume, last 104 weeks — +66.6% search growth over the last 90 days.Peak months: Apr, May, Jun, Jul · busiest ÷ quietest = 2.7×
Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Build quality feels solid”
“Fit perfectly”
“As advertised”
“Definitely worth the money”
“Good filter”
“Easy to mount”
“Works good”
“Nothing is leaking”
“Easy replacement for my mercury 4 stroke”
“Easy Peasy”
What buyers complain about
“Leaks”
“nor allow carb filter to fail”
“Short Scres”
“Not sure if defect in housing or just poor quality”
“Didn't last a month”
“They are spendy for what it is”
“For some reason it doesnt separate the water”
“Metal shavings”
“Not reliable plastic”
“Does not last I get corroded”