{"product_id":"27803508-mercury-mercruiser-gasket-genuine-quicksilver-oem-part","title":"27803508 Mercury MerCruiser Gasket | Genuine Quicksilver OEM Part","description":"\u003cp\u003e\n 🔧 Product Description\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Genuine Quicksilver Cylinder Head Gasket - Part Number: 27-803508\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine Quicksilver cylinder head gasket for Mercury \/ Mariner 4HP, 5HP and 6HP four-stroke outboards. This gasket seals the cylinder head to the block and is replaced during cylinder head removal, top-end inspection or engine resealing.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n ⚙️ Key Features\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Quicksilver OEM cylinder head gasket\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct Mercury part number 27-803508\n\u003c\/p\u003e\n\u003cp\u003e\n • Used on Mercury \/ Mariner 4HP, 5HP and 6HP four-stroke outboards\n\u003c\/p\u003e\n\u003cp\u003e\n • Also cross-referenced with Tohatsu \/ Nissan small outboard gasket reference 3H6-01005-1\n\u003c\/p\u003e\n\u003cp\u003e\n • Required replacement gasket when the cylinder head is removed\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔄 Supersession \u0026amp; Cross Reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM Supersession Chain:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-803508 current OEM service reference\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n OEM \/ Related Numbers:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-803508\n\u003c\/p\u003e\n\u003cp\u003e\n • 803508\n\u003c\/p\u003e\n\u003cp\u003e\n • 27803508\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Aftermarket \/ Verified Equivalents:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Tohatsu \/ Nissan: 3H6-01005-1\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🚤 Compatibility\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Commonly used on:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 4-stroke small outboard cylinder head gasket applications\n\u003c\/p\u003e\n\u003cp\u003e\n • 4HP, 5HP and 6HP cylinder block \/ cylinder head assemblies where 27-803508 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Typically suits:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine models:\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 4HP 4-stroke - serial 0P073456 to 0P400999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 4HP 4-stroke - serial 0P401000 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 4HP 4-stroke - serial 0R000001 to 0R067089\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 4HP 4-stroke - serial 0R067090 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 4HP 4-stroke - serial 0R411838 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke - serial 0P073456 to 0P400999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke - serial 0P401000 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke - serial 0R000001 to 0R067089\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke - serial 0R067090 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke - serial 0R411838 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP 4-stroke JCI - serial 0R560794 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 5HP Propane - serial 0R936270 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 4-stroke - serial 0P073456 to 0P400999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 4-stroke - serial 0P401000 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 4-stroke - serial 0R000001 to 0R067089\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 4-stroke - serial 0R067090 to 0R411837\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 6HP 4-stroke - serial 0R411838 and up\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: 4HP - 6HP\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury \/ Mariner single-cylinder four-stroke outboard\n\u003c\/p\u003e\n\u003cp\u003e\n • System Type: Cylinder head to block gasket\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 🔌 Function\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n The cylinder head gasket seals combustion pressure, cooling passages and oil-return areas between the cylinder head and engine block.\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n Common signs of failure:\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Compression loss\n\u003c\/p\u003e\n\u003cp\u003e\n • Overheating\n\u003c\/p\u003e\n\u003cp\u003e\n • Water or oil contamination\n\u003c\/p\u003e\n\u003cp\u003e\n • Poor starting or rough running\n\u003c\/p\u003e\n\u003cp\u003e\n • Gasket replacement required after cylinder head removal\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n 📦 Condition\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • Genuine Quicksilver part\n\u003c\/p\u003e\n\u003cp\u003e\n • Brand new\n\u003c\/p\u003e\n\u003cp\u003e\n • Supplied in original or equivalent packaging\n\u003c\/p\u003e\n","brand":"Quicksilver","offers":[{"title":"Default Title","offer_id":53388148506916,"sku":"1733773","price":30.65,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_bbb26cc0-b659-4e13-ac7e-2ac2380844cd.jpg?v=1777212148","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/27803508-mercury-mercruiser-gasket-genuine-quicksilver-oem-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}