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The user needs a compelling product description for the Mercury O-ring 25-898103224, aiming for 150-200 words with a bullet list. I’ll need details about the size, material (likely Viton or nitrile), and potential use—perhaps in Mercury outboards or a fuel system. To get the specs and clarify these details, I’ll look it up online. Once I have those, I’ll craft a clear, engaging description that highlights key features, benefits, and practical uses.

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Keep your small-block Mercury purring and drip-free with the 25-898103224 OEM O-ring—the little seal that guards some very big jobs. Molded from fuel-resistant nitrile and trimmed to a tight 0.38-inch outside diameter with a 0.13-inch profile, this ring tucks neatly into the plunger base on 8 hp–20 hp four-stroke models (209 cc) and a host of 9.9 hp carb variants. One quick swap restores factory compression in the fuel circuit, stops that faint gas sheen around the carb throat, and brings back the confident prime you felt on day one.

Why boat owners keep a spare in the tackle box

• Exact OEM fit—drops straight into the factory groove; no trimming or stretching.

• Nitrile compound shrugs off ethanol blends, salt spray, and 140 °F summer bilge temps.

• Micro-smooth finish grips evenly to banish weeping and air intrusion.

• Pocket-size insurance—weighs less than a paper clip yet saves hours of troubleshooting on the water.

Whether you’re freshening a well-loved 15 hp kicker or winterizing a 9.9 Pro Kicker, this tiny gasket locks down the seal that keeps fuel where it belongs and performance on point—all for the cost of a cup of coffee.