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Mercury Prop Exhaust Seal Ring – 878421 Used to prevent “blowout” Fills gap between propeller and gearcase Reduces ventilation Used with Trophy Plus propellers on V6 & V8 gearcases Note: Recommended for 200‑ 275 Verado when using Trophy Plus.
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🇺🇸 Ship from USA · On Agora since 2026
$18.75