Evinrude/Johnson Gearcase Fill & Vent Screw Seal (0311598, 311598)
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This genuine OEM Evinrude/Johnson Gearcase Drain & Vent Screw Seal, part number 0311598 is a standard changeout item every time the gearcase oil is replaced. Don't risk water intrusion to your expensive gearcase components by reusing the old seals. They're designed as a single use item and keep your gearcase sealed properly.