{"product_id":"plug-water-jacket-305-350-1-7-8","title":"Indmar 551073 Water Jacket Plug 1 5\/8\"","description":"\u003cp\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/logo-indmar-min_0e25333a-de6f-4d2f-8df6-c5860601bedc.png?v=1776958495\" alt=\"\"\u003e\u003c\/p\u003e\n\u003cdiv class=\"qMYqUG_convSearchResultHighlightRoot\"\u003e\n\u003cdiv class=\"\" data-turn-id-container=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-18\" data-is-intersecting=\"true\"\u003e\n\u003csection class=\"text-token-text-primary w-full focus:outline-none has-data-writing-block:pointer-events-none [\u0026amp;:has([data-writing-block])\u0026gt;*]:pointer-events-auto R6Vx5W_threadScrollVars scroll-mb-[calc(var(--scroll-root-safe-area-inset-bottom,0px)+var(--thread-response-height))] scroll-mt-[calc(var(--header-height)+min(200px,max(70px,20svh)))]\" dir=\"auto\" data-turn-id=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-18\" data-turn-id-container=\"request-69ea37f2-9634-83ea-95ed-3658eca80b3e-18\" data-testid=\"conversation-turn-270\" data-scroll-anchor=\"false\" data-turn=\"assistant\"\u003e\n\u003cdiv class=\"text-base my-auto mx-auto pb-10 [--thread-content-margin:var(--thread-content-margin-xs,calc(var(--spacing)*4))] @w-sm\/main:[--thread-content-margin:var(--thread-content-margin-sm,calc(var(--spacing)*6))] @w-lg\/main:[--thread-content-margin:var(--thread-content-margin-lg,calc(var(--spacing)*16))] px-(--thread-content-margin)\"\u003e\n\u003cdiv class=\"[--thread-content-max-width:40rem] @w-lg\/main:[--thread-content-max-width:48rem] mx-auto max-w-(--thread-content-max-width) flex-1 group\/turn-messages focus-visible:outline-hidden relative flex w-full min-w-0 flex-col agent-turn\"\u003e\n\u003cdiv class=\"flex max-w-full flex-col gap-4 grow\"\u003e\n\u003cdiv data-message-author-role=\"assistant\" data-message-id=\"c5c73c9e-c19b-4ad8-b4c8-c23f81eb0845\" dir=\"auto\" data-message-model-slug=\"gpt-5-5\" class=\"min-h-8 text-message relative flex w-full flex-col items-end gap-2 text-start break-words whitespace-normal outline-none keyboard-focused:focus-ring [.text-message+\u0026amp;]:mt-1\" data-turn-start-message=\"true\" tabindex=\"0\"\u003e\n\u003cdiv class=\"flex w-full flex-col gap-1 empty:hidden\"\u003e\n\u003cdiv class=\"markdown prose dark:prose-invert wrap-break-word w-full dark markdown-new-styling\"\u003e\n\u003ch2 data-section-id=\"1ybqf84\" data-start=\"0\" data-end=\"36\"\u003eIndmar 551073 Water Jacket Plug\u003c\/h2\u003e\n\u003cp data-start=\"39\" data-end=\"341\"\u003eMaintain proper cooling system sealing and dependable engine performance with the Indmar 551073 Water Jacket Plug. Designed as a genuine OEM replacement, this plug seals critical water jacket passages within the engine cooling system to help prevent coolant leaks and maintain proper water circulation.\u003c\/p\u003e\n\u003cp data-start=\"343\" data-end=\"742\"\u003eWater jacket plugs play an important role in marine engine cooling systems by sealing internal coolant passages within the engine block and cylinder heads. Over time, plugs can corrode, weaken, or become damaged from repeated heat cycles, moisture exposure, and cooling system pressure. Replacing worn plugs helps preserve cooling system integrity and reduce the risk of leaks or overheating issues.\u003c\/p\u003e\n\u003cp data-start=\"744\" data-end=\"1071\"\u003eManufactured to Indmar factory specifications, the 551073 water jacket plug is built using durable marine-grade materials engineered for long-term reliability in harsh boating environments. Designed as a direct-fit replacement, it provides dependable fitment and secure sealing performance for compatible Indmar marine engines.\u003c\/p\u003e\n\u003chr data-start=\"1073\" data-end=\"1076\"\u003e\n\u003ch3 data-section-id=\"lmqikf\" data-start=\"1078\" data-end=\"1106\"\u003eCommon Engine Fitments\u003c\/h3\u003e\n\u003cp data-start=\"1107\" data-end=\"1203\"\u003eThe Indmar 551073 water jacket plug is commonly used on select Indmar marine engines, including:\u003c\/p\u003e\n\u003cul data-start=\"1205\" data-end=\"1380\"\u003e\n\u003cli data-section-id=\"1desx88\" data-start=\"1205\" data-end=\"1228\"\u003eIndmar Assault 5.7L\u003c\/li\u003e\n\u003cli data-section-id=\"1wc08cw\" data-start=\"1229\" data-end=\"1251\"\u003eIndmar Monsoon 325\u003c\/li\u003e\n\u003cli data-section-id=\"1wbyrgz\" data-start=\"1252\" data-end=\"1274\"\u003eIndmar Monsoon 340\u003c\/li\u003e\n\u003cli data-section-id=\"1h4pca4\" data-start=\"1275\" data-end=\"1297\"\u003eIndmar Assault 325\u003c\/li\u003e\n\u003cli data-section-id=\"89pbja\" data-start=\"1298\" data-end=\"1317\"\u003eIndmar 5.0L MPI\u003c\/li\u003e\n\u003cli data-section-id=\"piq4u9\" data-start=\"1318\" data-end=\"1337\"\u003eIndmar 5.7L MPI\u003c\/li\u003e\n\u003cli data-section-id=\"1hk6wam\" data-start=\"1338\" data-end=\"1380\"\u003eSelect Indmar 6.0L engine applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1382\" data-end=\"1420\"\u003eThese engines are frequently found in:\u003c\/p\u003e\n\u003ch4 data-start=\"1422\" data-end=\"1439\"\u003eSupra Models\u003c\/h4\u003e\n\u003cul data-start=\"1440\" data-end=\"1561\"\u003e\n\u003cli data-section-id=\"hx8ns4\" data-start=\"1440\" data-end=\"1462\"\u003eSupra Launch 20SSV\u003c\/li\u003e\n\u003cli data-section-id=\"1y4uqed\" data-start=\"1463\" data-end=\"1483\"\u003eSupra Launch 21V\u003c\/li\u003e\n\u003cli data-section-id=\"13dfkxl\" data-start=\"1484\" data-end=\"1506\"\u003eSupra Sunsport 22V\u003c\/li\u003e\n\u003cli data-section-id=\"y12vv\" data-start=\"1507\" data-end=\"1522\"\u003eSupra 22SSV\u003c\/li\u003e\n\u003cli data-section-id=\"1xtix3y\" data-start=\"1523\" data-end=\"1561\"\u003eSupra Gravity Games Edition models\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-start=\"1563\" data-end=\"1581\"\u003eMoomba Models\u003c\/h4\u003e\n\u003cul data-start=\"1582\" data-end=\"1674\"\u003e\n\u003cli data-section-id=\"1jyt31p\" data-start=\"1582\" data-end=\"1603\"\u003eMoomba Mobius LSV\u003c\/li\u003e\n\u003cli data-section-id=\"1kccnk6\" data-start=\"1604\" data-end=\"1625\"\u003eMoomba Mobius XLV\u003c\/li\u003e\n\u003cli data-section-id=\"1ybu7ou\" data-start=\"1626\" data-end=\"1644\"\u003eMoomba Outback\u003c\/li\u003e\n\u003cli data-section-id=\"78a218\" data-start=\"1645\" data-end=\"1660\"\u003eMoomba Mojo\u003c\/li\u003e\n\u003cli data-section-id=\"a4bwlw\" data-start=\"1661\" data-end=\"1674\"\u003eMoomba LS\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-start=\"1676\" data-end=\"1789\"\u003eAdditional applications may include Malibu and MasterCraft boats equipped with compatible Indmar engine packages.\u003c\/p\u003e\n\u003cp data-start=\"1791\" data-end=\"1964\"\u003eThe 551073 plug is commonly used in engine block cooling jacket systems where maintaining a proper seal is essential for dependable engine cooling and long-term reliability.\u003c\/p\u003e\n\u003cp data-start=\"1966\" data-end=\"2138\"\u003eFitment may vary depending on engine serial number and cooling system configuration, so confirming compatibility with part number \u003cstrong data-start=\"2096\" data-end=\"2106\"\u003e551073\u003c\/strong\u003e before ordering is recommended.\u003c\/p\u003e\n\u003chr data-start=\"2140\" data-end=\"2143\"\u003e\n\u003ch3 data-section-id=\"1iz91iu\" data-start=\"2145\" data-end=\"2161\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-start=\"2162\" data-end=\"2493\"\u003e\n\u003cli data-section-id=\"1cze1i8\" data-start=\"2162\" data-end=\"2202\"\u003eGenuine Indmar OEM water jacket plug\u003c\/li\u003e\n\u003cli data-section-id=\"4gngg1\" data-start=\"2203\" data-end=\"2254\"\u003eHelps seal engine cooling system water passages\u003c\/li\u003e\n\u003cli data-section-id=\"16es6ue\" data-start=\"2255\" data-end=\"2305\"\u003eDesigned for Indmar marine engine applications\u003c\/li\u003e\n\u003cli data-section-id=\"15kswm3\" data-start=\"2306\" data-end=\"2375\"\u003eMarine-grade construction for durability and corrosion resistance\u003c\/li\u003e\n\u003cli data-section-id=\"1h20sdn\" data-start=\"2376\" data-end=\"2433\"\u003eHelps prevent coolant leaks and cooling system issues\u003c\/li\u003e\n\u003cli data-section-id=\"iy0gvr\" data-start=\"2434\" data-end=\"2493\"\u003eDirect-fit replacement for straightforward installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003chr data-start=\"2495\" data-end=\"2498\"\u003e\n\u003ch3 data-section-id=\"wbgdzv\" data-start=\"2500\" data-end=\"2538\"\u003eWhy Replace a Water Jacket Plug?\u003c\/h3\u003e\n\u003cp data-start=\"2539\" data-end=\"2812\"\u003eCooling system plugs can corrode or weaken over time due to constant exposure to coolant, moisture, and engine heat. Replacing worn plugs helps maintain proper cooling system integrity and protects the engine from leaks that could lead to overheating or performance issues.\u003c\/p\u003e\n\u003cp data-start=\"2814\" data-end=\"3007\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eIf you’re servicing an Indmar-powered Supra, Moomba, Malibu, or MasterCraft, the 551073 water jacket plug delivers the OEM-quality fit and dependable sealing performance your engine depends on.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"z-0 flex min-h-[46px] justify-start\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003cdiv class=\"mt-3 w-full empty:hidden\"\u003e\n\u003cdiv class=\"text-center\"\u003e\u003cbr\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/section\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Indmar","offers":[{"title":"Default Title","offer_id":48898736324865,"sku":"551073","price":9.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0056\/9429\/2079\/files\/551073.jpg?v=1779471985","url":"https:\/\/inboardpartshq.com\/products\/plug-water-jacket-305-350-1-7-8","provider":"Inboard Parts HQ","version":"1.0","type":"link"}