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home > Sierra 18-7920 Filter-Gas OMC 10M Racor S3214 > Sierra 18-7920 Filter-Gas OMC 10M Racor S3214
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Sierra 18-7920 Filter-Gas OMC 10M Racor S3214Why Your Boat Needs Superior Fuel Water Separation Picture this: you're out on the water, miles from shore, when your engine sputters because water snuck into the fuel tank from condensation or bad gas. That's where a high performance fuel water separator like this one steps in, keeping your outings smooth and worry free. Designed for marine enthusiasts who demand reliability, it tackles emulsified water head on, ensuring clean fuel reaches your
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Why Your Boat Needs Superior Fuel Water Separation

Picture this: you're out on the water, miles from shore, when your engine sputters because water snuck into the fuel tank from condensation or bad gas. That's where a high-performance fuel water separator like this one steps in, keeping your outings smooth and worry-free. Designed for marine enthusiasts who demand reliability, it tackles emulsified water head-on, ensuring clean fuel reaches your engine every time.

Exceptional Water Removal and Flow Rates

This filter stands out by capturing over 98.8% of emulsified water in gasoline—far beyond basic filters. Whether you're running a high-revving outboard or a stern drive, the consistent 90 gallons per hour (GPH) flow rate keeps up with power-hungry motors. No more starving your engine during those critical moments of acceleration or sustained cruising.

Clear vs. Metal Bowls: Choose Based on Your Setup

Selecting the right bowl matters for safety and visibility. Opt for clear bowls on outboards or above-deck installs—they let you spot water buildup or debris at a glance, making routine checks a breeze. For below-deck applications, metal bowls are essential, meeting U.S. Coast Guard (USCG) flame-resistant standards to handle the heat and risks in enclosed spaces. Both options integrate seamlessly into your system, balancing visibility with regulatory compliance.

Key Features at a Glance

  • Proven 98.8%+ emulsified water removal for gasoline
  • 90 GPH flow capacity for demanding engines
  • Direct compatibility with OMC 10-Micron and Racor S3214 setups
  • Durable construction resists corrosion in harsh marine environments
  • Easy-drain design simplifies water evacuation without tools

Perfect Fit for OMC and Racor Systems

Engineered as a drop-in replacement for OMC 10-micron gasoline filters and Racor S3214 elements, it restores factory-level performance without modifications. Boaters upgrading from worn OEM parts appreciate the precise fit, which minimizes leaks and maximizes efficiency. It's a smart choice for classic OMC-powered boats or modern rebuilds where Racor filtration is standard.

Installation Made Simple for DIY Boaters

Swapping in this filter takes under 30 minutes with basic tools. Start by shutting off fuel supply and relieving pressure, then unscrew the old bowl or element. Clean mounting surfaces, thread on the new unit hand-tight plus a quarter-turn, and prime the system. Pro tip: Always check O-rings for cracks during install to prevent drips— a quick lube with marine grease extends their life.

Maintenance Tips to Extend Filter Life

Regular upkeep keeps it performing like new. Drain accumulated water weekly or after every 50 hours of use, inspecting for fuel discoloration or particulates. In humid climates or with ethanol-blended gas, swap the element every 100-200 hours or annually. Signs it's time for replacement? Hesitation under load, rough idling, or visible water in the bowl—address them promptly to safeguard injectors and carbs.

Real-World Reliability for Every Adventure

From offshore fishing trips to weekend lake cruises, this filter has proven itself in salty bays and freshwater reservoirs alike. Anglers love how it prevents gelled fuel issues in cooler months, while performance boaters rely on its high flow for twin-engine setups. It's not just a part—it's peace of mind on the water.

Frequently Asked Questions

What percentage of water does this fuel filter remove?

It efficiently removes over 98.8% of emulsified water from gasoline, protecting your engine from corrosion and performance issues.

Is this filter suitable for below-deck installations?

Yes, when equipped with a metal bowl. USCG regulations mandate flame-resistant metal bowls for below-deck use to ensure safety.

What is the flow rate of this marine fuel separator?

It delivers a robust 90 GPH flow rate, ideal for high-demand outboards and stern drives without restricting fuel delivery.

Does it replace OMC 10-micron or Racor S3214 filters?

Absolutely—it's a direct, reliable replacement for both OMC 10M and Racor S3214 gasoline filters, ensuring a perfect fit.

How often should I service this fuel water separator?

Drain water weekly or every 50 hours. Replace the element every 100-200 hours, or sooner if you notice fuel issues or contamination.

Can I use a clear bowl on an inboard engine?

Clear bowls are best for outboards or above-deck spots for easy monitoring. Switch to metal bowls for inboards or below-deck to comply with safety regs.

Will this filter work with ethanol-blended gasoline?

Yes, it's designed for modern gasoline including ethanol blends, effectively separating water that can cause phase separation.

Sierra fuel water separators remove over 98.8% of emulsified water from your gasoline. All filters flow @ 90 GPH to feed even the hungriest motor.
Clear Bowls: Use for outboard and above deck installations.
Metal Bowls: USCG regulations require the use of flame resistant metal bowls below deck.


SKU: NVN-4002162
MPN: 18-7920
UPC: 808282199845

Sierra 18-7920 Filter-Gas OMC 10M Racor S3214

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