r12t fuel filter
Worth a lookShows a sweet-spot price point ($21.74 avg), but a small market ($16K/yr) keeps it on the watch list.
Avg price
Great$21.74avg listing price — sweet spot $15–$100
Price range
Great$12.47–$50.00cheapest to priciest tracked listing — scored on the share inside $15–$100
Review moat
Great211.94avg incumbent reviews — the moat a new listing must climb
Returns
Great1.4%return rate — above 6% kills the launch gate
Growth
Great+76.7%90-day search growth — must beat 0% to launch
Conversion
Good5.0%search→purchase rate — share of searches ending in a sale
Brand share
Okay88%top-5 brand share — brands hold most of the demand
Quality gap
Okay4.6★avg incumbent rating — lower means beatable quality
Competition
Bad75%top-5 click share — a locked-up shelf
Market size
Bad$16K$16K/yr · 15K searches
Competition
The top 5 products capture 75% of clicks — a locked-up shelf that new listings rarely crack.Brands
10 falling
Sellers
12
Top-5 brand share
88%
Open market
8%
- TRSCJXN38%
- DZFST.FI19%
- CARMOCAR19%
- AUIVERED7%
- AULDAY5%
- Hoypeyfiy4%
- Open — no brand owns it (4 brands, 8%)
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 16 tracked products in this niche — three views at once, no toggling.
Top sellers
by 90-day click share
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
DZFST.FI R12T Fuel Filter Water Separator Spin-on R12T Filter with Water Collection Bowl Diesel Engine & Gasoline Engine Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19
DZFST.FI$16.974.6★70 rev
R12T Fuel Filter Water Separator with Clear Nylon Collection Bowl 3/8 Inch NPT Spin-on Assembly Replaces S3240 120AT 18-7947 18-7987 NPT ZG1/4-19
TRSCJXN$14.305.0★4 rev
CARMOCAR Marine Fuel Water Separator Element of R12T Water Separator 120AT NPT ZG1/4-19 for Marine Engine S3240 120AT 18-7947 35-60494-1
CARMOCAR$12.474.7★35 rev
CARMOCAR Marine Fuel Water Separator/Diesel Fuel Filter/Water Separator for R12T MARINE SPIN-ON HOUSING 120AT NPT ZG1/4-19 Includes 2 fittings 2 plugs
CARMOCAR$21.774.3★337 rev
Newest
by launch dateR12T Fuel Filter Water Separator with Clear Nylon Collection Bowl 3/8 Inch NPT Spin-on Assembly Replaces S3240 120AT 18-7947 18-7987 NPT ZG1/4-19
TRSCJXN$14.304 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
AUIVERED R12T Fuel Filter Water Separator Element - 120AT NPT ZG1/4-19 Automotive Part Fits Marine Diesel Engine - Replaces S3240 18-7947
AUIVERED$12.7616 rev
AUIVERED R12T Fuel Filter Water Separator with Collection Bowl- Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19 Automotive Parts with Fitting
AUIVERED$16.0518 rev
4PCS R12T Fuel Filter Water Separator With Water Collection Bowl Fits for Diesel Engine & Gasoline Engine Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19
AULDAY$39.717 rev
Trending
90-day click momentumR12T Fuel Filter Water Separator with Clear Nylon Collection Bowl 3/8 Inch NPT Spin-on Assembly Replaces S3240 120AT 18-7947 18-7987 NPT ZG1/4-19
TRSCJXN$14.305.0★
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★
AUIVERED R12T Fuel Filter Water Separator with Collection Bowl- Replaces# S3240 R12T 120AT 18-7987 NPT ZG1/4-19 Automotive Parts with Fitting
AUIVERED$16.054.8★
ACA R12T Marine Fuel Separator with Collection Bowl 1/4 NPT
ACA$13.224.5★
AUIVERED R12T Fuel Filter Water Separator Element - 120AT NPT ZG1/4-19 Automotive Part Fits Marine Diesel Engine - Replaces S3240 18-7947
AUIVERED$12.764.4★
Demand
Weekly Amazon search volume, last 9 weeks — +76.7% search growth over the last 90 days.Reviews
What buyers praise and complain about, mined from review topics.What buyers love
“Great fuel filter”
“construction over all is very good”
“Definitely worth the money”
“Installation was straightforward”
“fits perfectly”
“It made a good modification for my BX 25d Kubota tractor”
“This filter doesn't leak”
“Great quality fuel/water separator”
“Its very durable and zero issues”
“As advertised”
What buyers complain about
“The clear bowl on the bottom of the filter continually leaked fuel”
“Tried everything to get it undone with breaking it and nothing worked, which means when it's time to change out the filter, both the filter and the catch bowl assembly will have to be repurchased”
“MISSING FITTINGS”
“Not reliable plastic”
“7 of them broke trying to affix a fuel hose to a gas tank”
“WHY NO INSTRUCTIONS AS TO HOW TO USE”
“Three are cheap trash”
“they tension gear breaks at the least amount of pressure you apply”
“Bad fuel is a fuel injection systems worst enemy”
“time consuming to repair”