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The Quicksilver 55730 is an OEM stainless steel block off plate engineered for MerCruiser fresh water cooling systems. Designed to seal the coolant passage between the exhaust manifold and riser, this plate prevents coolant from escaping through the riser on fresh water cooled applications.
Installed by sandwiching the plate between two riser gaskets, it provides a reliable, corrosion-resistant seal at a critical point in the cooling circuit. Stainless steel construction ensures long-term durability in the demanding marine environment.
Key Features:
Two riser gaskets are required for installation (Mercury/Quicksilver part #52076 or equivalent). Backed by Mercury Marine's standard 1-year factory warranty against defects in materials and workmanship.
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