Description
R12T Fuel Filter Water Separator — Complete Combo Kit (10 Micron, 15 GPH)
Product Overview
R12T Fuel Filter Water Separator Combo Kit — 10 Micron Spin-On Filter, Replaces Racor S3240 & 120AT. Fits NPT ZG1/4-19 Outboard Motors for Gas & Diesel Engines. Complete all-in-one kit includes aluminum filter head, 10-micron filter element, clear water collection bowl, 4 brass fittings, and 2 port plugs — everything you need for a professional installation.
Engineered to replace the widely-used Racor S3240 and 120AT series fuel water separators, this kit removes both solid contaminants and emulsified water from your fuel system. The 10-micron filtration media captures fine particles that can damage injectors and high-pressure pumps, while the clear collection bowl lets you visually inspect for water accumulation at a glance. With a flow rate of 15 gallons per hour, it handles engines from small marine outboards up to mid-size diesel powerplants.
Key Features
-
Complete All-in-One Kit: Filter head, spin-on element, water bowl, four fittings, and two plugs — no separate purchases needed.
-
10-Micron Filtration: High-efficiency cellulose media captures 99% of particles ≥10 microns, protecting injectors and fuel pumps from abrasive wear.
-
Clear Visual Water Detection: Transparent nylon bowl with drain valve allows instant water level inspection and easy draining without disassembly.
-
Racor S3240 / 120AT Compatible: Direct replacement for the most popular marine and industrial fuel water separator series on the market.
-
Corrosion-Resistant Construction: Anodized aluminum filter head resists salt spray, diesel fuel, and biodiesel blends.
-
15 GPH Flow Rate: Supports engines up to approximately 150 HP in continuous operation.
Compatibility / Fitment
| Application |
Engine Type |
Fitment Notes |
| Marine Outboard (Mercury, Yamaha, Suzuki) |
Gas/Diesel |
Up to 150 HP — NPT ZG1/4-19 ports |
| Marine Inboard Diesel |
Diesel |
Yanmar, Volvo Penta, Cummins small frame |
| Diesel Generator Sets |
Diesel |
Onan, Kohler, Generac — 10-30 kW |
| Light Industrial Equipment |
Diesel |
Skid steers, compact tractors, pumps |
| Racor S3240 / 120AT Systems |
All |
Direct drop-in replacement |
Specifications
| Specification |
Value |
| Filter Micron Rating |
10 Micron (Nominal) |
| Flow Rate |
15 GPH (57 LPH) |
| Port Thread |
NPT ZG1/4-19 |
| Filter Head Material |
Anodized 6061 Aluminum |
| Bowl Material |
Chemical-Resistant Clear Nylon |
| Compatible Filter Elements |
120AT, S3240, R12T series |
| Operating Pressure |
Max 15 PSI (Suction Side) |
| Kit Includes |
Head + Element + Bowl + 4 Brass Fittings + 2 Plugs |
Installation Tips
- Mount the filter head vertically with the bowl facing down for proper water separation.
- Apply 2-3 wraps of PTFE thread sealant tape on all NPT fittings — do not overtighten.
- Prime the filter element with clean diesel before first start to prevent air lock.
- Drain the water bowl monthly or whenever water is visible in the collection chamber.
- Replace the filter element every 100 engine hours or annually, whichever comes first.
Frequently Asked Questions
Q: Will this fit my Mercury outboard fuel system?
A: Yes. The R12T uses standard NPT ZG1/4-19 ports compatible with Mercury, Yamaha, and Suzuki outboard fuel line fittings from 4 HP to 200 HP. The kit includes four brass adapters for flexible installation.
Q: Is this a direct replacement for Racor S3240?
A: Absolutely. The thread pattern and mounting dimensions are identical to the Racor S3240 / 120AT series. You can swap your existing element and bowl, or use the complete iFJF kit for a full refresh.
Q: How do I know when to drain the water bowl?
A: The clear nylon bowl allows visual water inspection. If you see a visible water layer or the red indicator ring floats up, open the bottom drain valve to purge. Check before every trip.
Q: Can I use this for gasoline engines?
A: Yes — compatible with both gasoline and diesel. For gasoline applications, drain the bowl more frequently as ethanol-blended fuels can attract moisture.
Q: What replacement filter elements fit?
A: Any 120AT-style spin-on filter element with the correct thread pattern. iFJF sells replacement R12T elements individually on our store.
📊 Independent Tear-Down: iFJF R12T vs Genuine Racor
Third-party visual comparison — filter head, element, and canister cut open side by side
-
Filter Head: Visually identical to genuine Racor — no notable differences found
-
Filter Element: ~23 inches longer than OEM — more filtration media inside
-
Canister Wall: Thicker than genuine Racor (20mm)
-
Complete Kit: Includes 2 brass fittings, 2 port plugs, and PTFE tape — everything needed to install
📦 Related Products & Guides
🛒 Complete Your Fuel System:
📖 Installation & Comparison Guides:
