{"product_id":"27991764-mercury-mercruiser-power-head-gasket-genuine-quicksilver-oem-part","title":"27991764 Mercury MerCruiser Power Head 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 Block \/ Powerhead Base Gasket - Part Number: 27-991764\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n A genuine Quicksilver cylinder block \/ powerhead gasket used on selected Mercury and Mariner V6 2.5L 2-stroke, EFI, DFI \/ OptiMax and high-performance outboards. This gasket seals the cylinder block \/ powerhead to the mounting plate or exhaust plate assembly and is commonly required during powerhead removal.\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 powerhead gasket\n\u003c\/p\u003e\n\u003cp\u003e\n • Correct Mercury part number 27-991764\n\u003c\/p\u003e\n\u003cp\u003e\n • Cylinder block \/ powerhead base gasket\n\u003c\/p\u003e\n\u003cp\u003e\n • Used on Mercury \/ Mariner V6 2.5L 2-stroke applications\n\u003c\/p\u003e\n\u003cp\u003e\n • Commonly listed in complete powerhead and lower-unit gasket set components\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 • 27-991764 current OEM service reference\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-991764 related to earlier 27-991763 \/ 27-991762 gasket-family references where applicable\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 • 27-991764\n\u003c\/p\u003e\n\u003cp\u003e\n • 991764\n\u003c\/p\u003e\n\u003cp\u003e\n • 27991764\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-99176-4\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-991763\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-991762\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-78069 related earlier V6 powerhead base gasket family\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-991734 related driveshaft housing gasket\n\u003c\/p\u003e\n\u003cp\u003e\n • 27-183076 related driveshaft housing plate gasket\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 • Sierra: 18-2506-1\n\u003c\/p\u003e\n\u003cp\u003e\n • WSM \/ aftermarket base gasket references for 27-991764 applications\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 V6 2.5L powerhead base \/ cylinder block gasket applications\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury DFI \/ OptiMax and EFI powerhead gasket set components\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 \/ Mariner 135HP V6 2.5L 2-stroke - serial 6618751 and up where 27-991764 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 150HP V6 2.5L 2-stroke - serial 6618751 and up where 27-991764 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 175HP V6 2.5L 2-stroke - serial 6618751 and up where 27-991764 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner 200HP V6 2.5L 2-stroke - serial 6618751 and up where 27-991764 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-135 DFI 2.5L - serial 0T801000 to 1B226999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-135 DFI 2.5L - serial 1B227000 to 1B417701\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-135 DFI 2.5L - serial 1B417702 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-150 DFI 2.5L - serial 0T801000 to 1B226999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-150 DFI 2.5L - serial 1B227000 to 1B417701\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-150 DFI 2.5L - serial 1B417702 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-175 DFI 2.5L - serial 0T801000 to 1B226999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-175 DFI 2.5L - serial 1B227000 to 1B417701\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-175 DFI 2.5L - serial 1B417702 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-150 EFI 2.5L - serial 0T801000 to 1B226999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-150 EFI 2.5L - serial 1B227000 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-200 EFI 2.5L - serial 0T801000 to 1B226999\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury V-200 EFI 2.5L - serial 1B227000 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 150 Pro XS 2.5L - serial 1B690542 to 2B535572\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 175 Pro XS 2.5L - serial 1B516339 to 2B535624\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 200XS DFI 2.5L - serial 0T818181 to 1E000796\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 200XS DFI 2.5L - serial 1E000797 to 1E002110\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 200XS ROS DFI 2.5L - serial 1E050852 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 200XS SST - serial 1E050629 and up\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury 110 \/ 140 Jet 2.5L V6 applications where 27-991764 is specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Mercury \/ Mariner V6 2.5L 135HP to 200HP 2-stroke outboards, commonly 1994-2014 service range where specified\n\u003c\/p\u003e\n\u003cp\u003e\n \u003cbr\u003e\n\u003c\/p\u003e\n\u003cp\u003e\n • HP Range: commonly 110 Jet through 225HP V6 applications where specified\n\u003c\/p\u003e\n\u003cp\u003e\n • Engine Type: Mercury \/ Mariner V6 2.5L 2-stroke, EFI, DFI \/ OptiMax and Racing outboard\n\u003c\/p\u003e\n\u003cp\u003e\n • System Type: Cylinder block \/ powerhead base 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 gasket seals the powerhead or cylinder block to the adapter \/ mounting plate, helping prevent exhaust leakage, water leakage and crankcase or midsection contamination at the base joint.\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 • Water or exhaust leakage at powerhead base\n\u003c\/p\u003e\n\u003cp\u003e\n • Overheating or cooling leakage after powerhead service\n\u003c\/p\u003e\n\u003cp\u003e\n • Exhaust residue around mounting plate\n\u003c\/p\u003e\n\u003cp\u003e\n • Gasket damaged during powerhead removal\n\u003c\/p\u003e\n\u003cp\u003e\n • Required replacement whenever the powerhead is lifted\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":53388108923172,"sku":"N388442","price":28.35,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0994\/8115\/7924\/files\/original_b4d84f36-6251-4ae6-998f-54297a140d46.jpg?v=1777210850","url":"https:\/\/www.sawleysautoandmarine.com.au\/products\/27991764-mercury-mercruiser-power-head-gasket-genuine-quicksilver-oem-part","provider":"Sawley's Auto and Marine","version":"1.0","type":"link"}