Description
Product Overview
This mounting bracket is a direct replacement for the 18-7853-1 filter base used with S3213 and S3214 fuel water separator assemblies. If your original bracket has rusted, developed stripped threads, or was lost during an engine rebuild, this bracket gets your filter back on the transom — securely. All-metal cast construction with a corrosion-resistant coating designed for years of saltwater marine service. Includes mounting hardware so you can complete the job with basic hand tools.
Key Features
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Direct 18-7853-1 Replacement: Same bolt pattern, same 3/8" NPT port placement, same overall dimensions as the OEM Mercury/Mariner bracket.
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3/8" NPT Female Ports: Pre-threaded to accept standard marine fuel line fittings. No tapping, no chasing threads — ready to go.
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All-Metal Cast Construction: No plastic components to crack, warp, or strip under torque. Built for the vibration and heat of an outboard engine compartment.
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Corrosion-Resistant Coating: Multi-layer finish designed to withstand salt spray, bilge humidity, and UV exposure without flaking.
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Includes Mounting Hardware: Bolts and washers included. No trip to the hardware store mid-install.
Compatibility
| Filter Assembly |
Compatibility |
| S3213 Fuel Water Separator (All Variants) |
Direct bolt-on — sealed, clear bowl, and upgraded versions |
| S3214 Fuel Water Separator |
Direct bolt-on — same thread pattern |
| Mercury / Mariner 18-7853-1 |
Exact replacement |
| Any 3/8" NPT Marine Filter |
Fits any fuel water separator with standard 2-bolt flange pattern |
Specifications
| Specification |
Value |
| Part Number |
18-7853-1 Replacement |
| Material |
Cast Metal with Corrosion-Resistant Coating |
| Port Type & Size |
3/8" NPT Female (Inlet & Outlet) |
| Bolt Pattern |
2-Bolt Flange, ~2.5" (63 mm) Center-to-Center |
| Filter Thread |
Standard S3213/S3214 Spin-On Thread |
| Includes |
Bracket, Mounting Bolts, Washers |
Why Choose This Bracket
A rusted or stripped mounting bracket is a safety hazard — a loose filter assembly can leak fuel into the bilge, creating a fire risk. Don't jury-rig a fix with zip ties or oversized bolts. This bracket restores a solid, leak-free mount that keeps your S3213 filter where it belongs. At a fraction of the cost of a complete filter assembly, it's the right repair for a common problem.
Frequently Asked Questions
Q: Will this bracket fit my S3213 filter assembly?
A: Yes — this bracket is designed specifically for S3213 and S3214 filter assemblies. It matches the OEM 18-7853-1 bolt pattern and thread dimensions exactly.
Q: Do I need to replace the entire filter if just the bracket is rusted?
A: No — if your S3213 filter body is still in good condition and only the bracket has rusted or developed stripped threads, you can replace just the bracket. Saves significant money versus buying a complete filter assembly.
Q: What's included in the package?
A: The bracket with pre-threaded 3/8" NPT ports, plus mounting bolts and washers. Your S3213 filter spins onto the bracket's center thread.
Q: How do I install this bracket?
A: (1) Unbolt and remove the old bracket from the transom or mounting surface. (2) Bolt the new bracket in place — apply marine sealant to bolt holes to prevent water intrusion. (3) Reconnect your fuel lines to the 3/8" NPT ports using appropriate thread sealant. (4) Spin your S3213 filter onto the bracket. Expect 15-20 minutes with basic hand tools.
Q: Is this for freshwater or saltwater use?
A: Both. The corrosion-resistant coating is specifically formulated for saltwater marine exposure. Rinse with fresh water during regular washdown to maximize service life.
Q: Will this bracket work with non-S3213 filters?
A: As long as the filter uses a standard 3/8" NPT spin-on thread and a 2-bolt flange mount, this bracket should fit. However, it's specifically designed and tested for S3213/S3214 assemblies.
Q: My old bracket's threads are stripped but the metal looks fine — can I just re-tap it?
A: We don't recommend re-tapping marine fuel system components. Stripped threads often indicate deeper corrosion or metal fatigue. For safety, replace the bracket. This replacement costs less than the risk of a fuel leak.
🔄 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.
