Marine Fuel Filters

R12T Fuel Filter Water Separator — Complete Combo Kit R12T Marine Fuel Water Separator — 10 Micron, 30 GPH, Replaces Racor S3240 / 120AT, NPT ZG1/4-19. Fits gas & diesel engines on boats, trucks, tractors, and generators. Complete combo kit includes the spin-on filter housing, two inlet/outlet fittings, two plugs, and a reusable clear nylon collection bowl with self-venting drain valve. 📋 Key Takeaways ✅ Complete combo kit — no separate parts to buy ✅ 10-micron filtration — removes water and particles down to 10 microns ✅ 30 GPH flow rate — supports engines up to 300HP ✅ NPT ZG1/4-19 ports with M18×1.5 center thread ✅ Reusable nylon collection bowl with self-venting drain valve ✅ Replaces Racor S3240, 120AT, Sierra 18-7987, RK10222 Features & Benefits Feature Benefit 10-Micron Filtration Media Captures emulsified water and fine particles before they reach your injectors — prevents injector seizure and CP4 pump failure 30 GPH Flow Rate Supports high-performance and fleet diesel engines without fuel starvation Clear Nylon Collection Bowl Visual inspection of water accumulation at a glance — no guesswork needed Self-Venting Drain Valve Tighten to seal, release to drain — service in under 2 minutes without tools Dual-Sided Port Configuration Inlet/outlet can run same-side or opposite-side to fit any engine bay layout Powder-Coated Steel Housing Electrostatic coating resists corrosion from saltwater, road salt, and diesel fuel Spin-On Design Tool-free filter replacement — just spin off the old, spin on the new Compatibility & Cross-Reference Part Number Brand R12T / 120AT Racor / Parker S3240 Racor 18-7987 Sierra Marine RK10222 Sierra Common Applications Diesel trucks — Duramax, Powerstroke, Cummins fuel system protection Marine engines — Yanmar, Volvo Penta, Mercury, Yamaha outboard/inboard Agricultural equipment — Kubota, John Deere, CAT, Case IH tractors Generators — Cummins Onan, CAT standby generators Off-road equipment — excavators, skid steers, bulldozers Specifications Part Number FJ-R12T (iFJF) Filter Type Spin-On Fuel Filter / Water Separator Micron Rating 10 Micron Flow Rate 30 GPH (114 LPH) Port Size NPT ZG1/4-19 (M18×1.5 Center Thread) Bowl Material Clear Nylon (Reusable, Self-Venting) Housing Material Powder-Coated Steel (Corrosion Resistant) Includes 1× Filter Assembly, 2× Fittings, 2× Plugs, 1× Nylon Bowl Why Choose iFJF? We built the R12T to match — and in many ways exceed — the OEM Racor specification. Every unit is: 🔍 Factory-tested for 10-micron filtration efficiency and 30 GPH flow rate 🛡️ Powder-coated inside and out for rust-free service life in marine environments 📦 Ready to install — includes fittings, plugs, and drain bowl in one box 💰 Priced for boat and fleet owners — premium filtration without the OEM markup Want to see how the R12T stacks up against the genuine Racor? Read our R12T vs Racor 120A comparison review → Looking for the upgradable R12H system (replace only the filter element, not the whole housing)? Check out the R12H Filter Element here → Frequently Asked Questions What's the difference between R12T and R12H? The R12T is a complete disposable filter assembly — when it clogs, you replace the entire unit including the housing. The R12H system is upgradeable: you keep the aluminum housing and only swap the filter cartridge. If you do frequent filter changes, the R12H upgrade pays for itself within 2-3 services. Does this fit my boat/diesel engine? The R12T fits any engine with NPT ZG1/4-19 (M18×1.5 center thread) ports. It's commonly used on Yanmar, Volvo Penta, Mercury, Cummins, and Kubota engines. The 30 GPH flow rate supports engines up to approximately 300HP. If you're unsure about fitment, contact us with your engine model. How often should I replace the R12T filter? Replace every 100-200 hours of engine operation, or annually — whichever comes first. In marine environments or if you use biodiesel, inspect the clear bowl at every fill-up and drain water as needed. Visual inspection: if the bowl shows more than 1/2" of water or the filter media appears dark/saturated, replace immediately. How do I drain water from the R12T bowl? Simply loosen the drain valve at the bottom of the clear nylon bowl — water and contaminants will drain out by gravity. Tighten the valve to seal. No tools required. Pro tip: keep a small catch cup under the bowl before opening the valve to avoid diesel on your bilge or garage floor. Can I use this with biodiesel? Yes — the R12T is compatible with B5-B20 biodiesel blends. However, biodiesel tends to hold more dissolved water than petroleum diesel, so we recommend more frequent bowl draining (every 25-50 hours) when running biodiesel. The powder-coated steel housing resists the higher corrosion potential of biodiesel blends. What cross-reference replacements match this filter? This R12T replaces: Racor S3240 / 120AT, Sierra 18-7987 / RK10222. It shares the same 10-micron rating, NPT ZG1/4-19 port size, and 30 GPH flow rate as the OEM Racor unit — at a more competitive price point. How do I install the R12T fuel filter assembly? Remove the old filter by spinning it counterclockwise (have a catch pan ready for residual fuel) Clean the mounting bracket surface and apply a thin film of diesel to the new filter's gasket Screw in the two inlet/outlet fittings (choose same-side or opposite-side configuration) Install the two plugs in the unused ports Spin the new R12T onto the mounting head clockwise until the gasket contacts, then tighten 3/4 turn by hand — do not overtighten Prime the system using the manual primer pump and check for leaks at all four ports Package Includes 1 × R12T Fuel Filter / Water Separator Complete Assembly 2 × NPT ZG1/4-19 Inlet/Outlet Fittings 2 × NPT ZG1/4-19 Plugs 1 × Clear Nylon Collection Bowl with Self-Venting Drain

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R12H Filter Element 2-Pack — Double the Protection, Half the Hassle Stock up and save with the iFJF R12H 10-micron replacement filter element twin pack. Keep one on your boat and one in your maintenance kit — never run your engine with a clogged filter again. Designed exclusively for the R12H aluminum fuel water separator assembly. Why Buy the 2-Pack? 💰 Save vs. Buying Singles — Two elements at a bundled price beats buying individually. ⛵ Always Ready at Sea — Keep a spare onboard. When water contamination hits mid-voyage, you can swap in minutes. 🔧 Fleet & Workshop Friendly — If you maintain multiple boats, diesel trucks, or equipment, the 2-pack keeps your service bay stocked. 📦 Free Storage — Filter elements don't expire. Buy now, use when you need them. Key Features 10-Micron Advanced Filtration — Removes water and contaminants as small as 10 microns from your fuel system. Precision Fit for R12H Assembly — Drop-in replacement, zero modifications required. 15 GPH Flow Rate — Maintains full fuel flow for high-performance marine and diesel applications. High-Capacity Media — Extended service life compared to generic alternatives. Genuine iFJF Quality — Not a generic substitute. Engineered to the exact specifications of our R12H system. Compatibility ⚠️ Exclusively for iFJF R12H Fuel Water Separator Assembly. Not compatible with sealed R12T units. Replaces filter cartridges in assemblies that match S3240, 120AT, 18-7987, RK10222 form factors. Specifications Pack Size 2 Filter Elements Filtration Rating 10 Micron Compatible Assembly iFJF R12H Fuel Water Separator Flow Rate 15 GPH (per element, in R12H assembly) Replaces Part # S3240 · 120AT · 18-7987 · RK10222 Recommended Interval Every 100 hours or annually per element Installation — Quick & Simple Shut off fuel supply to the R12H assembly Unscrew the aluminum housing Remove the old filter element (firm push required) Lubricate the O-rings with clean fuel Insert the new element, reassemble, and fill with fuel Start engine — done in under 10 minutes! Frequently Asked Questions Q: Two elements — how long will they last?A: With recommended 100-hour replacement intervals, a 2-pack covers up to 200 operating hours or 2 years of seasonal boating. Q: Buy 2-pack or single?A: If you plan on keeping your boat/truck for more than one season, the 2-pack saves you money plus you always have a spare. Need just one? Single pack here. Q: Don't have the R12H assembly yet?A: Get the complete R12H combo here — includes the aluminum housing + 3 filter elements + all fittings. Complete Your Setup 🛒 R12H Complete Assembly — The full system with aluminum housing 🛒 Single Filter Element — Individual replacement cartridge R12T Fuel Filter Water Separator Complete Combo Kit →

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Marine-Grade Fuel Water Separator — Protect Your Engine, Save on Maintenance R12H Marine Fuel Water Separator — 10 Micron, 15 GPH, Aluminum Alloy, Replaces Racor S3240 / 120AT, NPT ZG1/4-19. Upgraded detachable filter element design: replace only the cartridge, keep the housing — saves up to 60% vs. disposable units. Complete kit includes aluminum housing, 3 filter elements, 4 O-rings, 2 inlet/outlet fittings, and 2 plugs. Key Features Detachable Spin-On Design — Replace only the filter element, not the entire unit. Quick tool-free cartridge swaps. Aluminum Alloy Body + Powder Coating — Superior corrosion resistance against seawater and harsh marine environments. Built to outlast iron/steel alternatives. 15 GPH High Flow Rate — Engineered for high-performance marine and diesel applications. Maintains fuel pressure under load. 10-Micron Advanced Filtration — High-capacity filter media removes water and particles as small as 10 microns for clean, water-free fuel delivery. Transparent Nylon Collection Bowl with Drain Valve — Visually inspect water accumulation and drain with a simple twist of the black valve. What's Included (Complete Combo) 1 x R12H Fuel Water Separator Assembly (aluminum housing + base) 3 x Filter Elements (1 installed + 2 bonus spares) 4 x O-Rings (2 installed + 2 bonus spares) 2 x NPT/ZG1/4-19 Connection Fittings 2 x Plugs for unused ports Installation Instructions Specifications Model R12H (R12T Upgrade) Material Aluminum Alloy + Powder Coating Flow Rate 15 GPH (57 LPH) Filtration 10 Micron Port Size NPT / ZG1/4-19 Filter Type Spin-On, Replaceable Cartridge Replaces Part # S3240, 120AT, 18-7987, RK10222, R12T Applications Marine boats, diesel trucks, generators, oil storage equipment Easy Installation — No Professional Tools Required (Boats) Designed for DIY boat owners. Comes with detailed step-by-step instructions: Apply fuel to both O-rings for lubrication before assembly Mount the unit securely — use screws on a wood board (min 1cm) with marine adhesive if you prefer not to drill into your boat Fill the filter housing completely with fuel before starting the engine to prevent air-lock Periodically check the collection bowl and drain accumulated water via the drain valve For automotive/diesel truck installation, professional installation is recommended. Frequently Asked Questions Q: What is the difference between R12H and R12T?A: The R12T has a sealed, non-removable filter element — you must replace the entire housing. The R12H has a detachable cartridge: keep the housing, replace only the internal filter, saving you money every service. Q: Will this fit my boat?A: As long as you have sufficient mounting space, it works for boats, cars, diesel trucks, and fuel storage equipment. Ports: NPT/ZG1/4-19. Q: Why won't my engine start after installation?A: You must fill the filter housing completely with fuel before starting. An empty filter causes air-lock and starting failure. Q: How often should I replace the filter element?A: Every 100 hours of operation or annually, whichever comes first. Check the transparent bowl regularly for water accumulation. Q: Is this compatible with Racor / Sierra / Yamaha systems?A: This replaces S3240 and 120AT filter elements commonly used across marine brands. Verify your port size (NPT/ZG1/4-19) and mounting space before ordering. WHOLESALE INQUIRIES Bulk pricing available for marine dealers, fleet operators, and distributors. Contact us for wholesale discounts. R12T Fuel Filter Water Separator Complete Combo Kit →

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Product Overview The S3213 fuel water separator is your outboard motor's first line of defense against water-contaminated fuel — the #1 cause of on-water engine failure. This sealed one-piece spin-on filter uses 10-micron filtration media to trap water droplets, rust particles, and debris before they reach your Mercury, Yamaha, or other outboard engine. Standard 3/8" NPT inlet/outlet ports make it a direct bolt-on replacement for dozens of OEM and aftermarket part numbers. No adapters, no modifications — spin off the old filter, spin on the S3213, and you're protected. Key Features 10-Micron Filtration: Traps water and contaminants down to 10 microns — fine enough to catch the debris that clogs carburetors and injectors. 3/8" NPT Standard Ports: Fits the most common marine fuel system thread size. Direct fit for Mercury, Yamaha, Suzuki, and Honda outboard applications. Sealed One-Piece Design: No internal cartridge to service — replace the entire unit in minutes. Ideal for boaters who want a simple, no-fuss maintenance routine. Corrosion-Resistant Exterior: Coated canister built to withstand saltwater spray and humid bilge conditions season after season. Wide Cross-Reference: Replaces over 20 OEM and aftermarket part numbers across multiple marine brands (see fitment table below). Compatibility & Fitment Brand Part Numbers Replaced Mercury / Mariner 35-60494-1, 35-809097, 802893Q01, 35-807172 Sierra Marine 18-7928-1, 18-7932-1, 18-7922, 18-7919 Mallory 9-37801, 9-37802 Moeller / Tempo 033510-10, 035613-10 GLM Marine 24960, 24961 Wix Filters 33264, 33265 Universal Cross-Ref S3213, S3214, B32013, C14568 Fits most Mercury, Mariner, Yamaha, Suzuki, Honda, and Tohatsu outboard motors with 3/8" NPT fuel connections, 1990-present. Specifications Specification Value Filter Type Spin-On Fuel Water Separator Micron Rating 10 Micron Port Size 3/8" NPT (Inlet & Outlet) Canister OD 3.0" (76 mm) Canister Height 4.5" (114 mm) Replacement Interval 50-100 Hours or Annually Design Sealed One-Piece (Non-Serviceable) Why Choose This Filter Every S3213 we sell ships from US inventory — no 3-week overseas wait times. Each unit is individually sealed and pressure-tested before it leaves our warehouse. We stand behind our products with a 30-day satisfaction guarantee and responsive US-based support. Most orders placed before 2 PM ship same-day. Frequently Asked Questions Q: Does this filter have a water drain bowl? A: No — this is the sealed one-piece S3213 with no drain bowl. If you want a clear bowl for visual water checks, see our S3213 with Clear Bowl or the upgraded replaceable-element S3213 linked below. Q: What's the difference between S3213 and S3214? A: The S3213 has a 3.0" OD canister (~4.5" tall). The S3214 is a physically larger filter with a wider body. Both share the same 3/8" NPT threads and 10-micron rating. The S3213 is the most common fit for outboard applications. Q: How often should I replace this filter? A: Replace every 50-100 engine hours, or at minimum once per boating season. Replace immediately if you notice hard starting, engine surging, or visible water in your fuel system. Q: Does this fit my Mercury outboard? A: Yes — this directly replaces Mercury/Mariner part numbers 35-60494-1, 35-809097, and 802893Q01. Fits most 2-stroke and 4-stroke outboards from 1990-present with 3/8" NPT fuel connections. Q: Is this filter suitable for saltwater use? A: Absolutely. The corrosion-resistant exterior coating is specifically designed for saltwater marine environments. The filtration media is unaffected by humidity or salt air. Q: Can I use this on a diesel engine? A: This 10-micron filter is optimized for gasoline outboard applications. For diesel engines, we recommend a 2-micron water separator for finer filtration. Q: Do I need a separate mounting bracket? A: This filter spins onto your existing S3213 mounting bracket (3/8" NPT thread). If you need a replacement bracket, we stock those separately — see our 18-7853-1 bracket listing. 🔄 Upgrade Available: Replaceable Filter S3213 We now offer an upgraded S3213 with a replaceable filter element — lower long-term cost, less waste. Same 10-micron filtration, same 3/8" NPT fit. Upgraded S3213 ($27.99) → — Replaceable element, includes clear bowl Replacement Cartridge ($10.00) → — Single 10-micron filter element 3-Pack Cartridges ($19.00) → — Best value at $6.33 each

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R12H Replacement Filter Element — Keep Your Marine Fuel System at Peak Performance This is the genuine iFJF R12H 10-micron replacement filter cartridge, designed exclusively for the R12H fuel water separator assembly. Unlike the older R12T (which forces you to replace the entire housing), the R12H system lets you swap only the filter element — saving you money every service while maintaining the same high-performance filtration. Key Features 10-Micron High-Capacity Filtration — Advanced filter media captures water and particles as small as 10 microns, ensuring clean, water-free fuel reaches your engine. Drop-In Replacement for R12H Assembly — Designed to fit the iFJF R12H aluminum housing perfectly. No modifications, no adapters needed. Cost-Effective Maintenance — Replace only the filter element, not the entire unit. A $13.99 cartridge vs. replacing a whole separator system. Marine & Diesel Ready — Built for the demands of saltwater marine environments, diesel trucks, generators, and fuel storage equipment. High Flow Design — Maintains 15 GPH flow rate when installed in the R12H assembly, ensuring consistent fuel delivery under load. Compatibility — Fits ONLY the iFJF R12H Assembly ⚠️ Important: This filter element is designed exclusively for the iFJF R12H fuel water separator housing. It replaces internal cartridges in assemblies that fit S3240, 120AT, 18-7987, and RK10222 form factors. ✅ Compatible with: iFJF R12H Fuel Water Separator Assembly ❌ NOT compatible with: Older R12T sealed units (the R12T cannot accept replacement cartridges) Specifications Product R12H Replacement Filter Element (1 Pack) Filtration Rating 10 Micron Compatible Assembly iFJF R12H Fuel Water Separator (Aluminum Housing) Replaces Part # S3240 · 120AT · 18-7987 · RK10222 (filter element only) Flow Rate 15 GPH (when installed in R12H assembly) Material High-efficiency cellulose/synthetic blend filter media Recommended Replacement Interval Every 100 hours of operation or annually When to Replace Your Filter Element 🔴 Engine hesitation or power loss under load 🔴 Visible water in the transparent collection bowl 🔴 More than 100 operating hours since last change 🔴 Annual preventive maintenance schedule 🔴 After any fuel contamination event Frequently Asked Questions Q: Will this fit the older R12T unit?A: No. The R12T is a sealed unit with a non-removable filter — you must upgrade to the R12H assembly to use replacement cartridges. This is why the R12H saves you money long-term. Q: How do I install the replacement element?A: 1) Shut off fuel supply. 2) Unscrew the R12H housing. 3) Remove old element (may require firm push). 4) Insert new element. 5) Lubricate O-rings with clean fuel. 6) Reassemble and fill with fuel before starting. Q: How many elements come in this package?A: This is a single (1-pack). We also offer a cost-saving 2-pack. Q: Do I have the R12H assembly?A: If your fuel water separator has a detachable aluminum housing with a replaceable internal cartridge, you have the R12H. Need the assembly? Shop here. Complete Your Fuel System 🛒 R12H Complete Assembly — The full aluminum housing + 3 elements combo 🛒 2-Pack Filter Elements — Save more with a twin pack 📖 See our 20K-view customer review: R12T vs R12H comparison & install guide → R12T Fuel Filter Water Separator Complete Combo Kit →

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