{"id":14603,"date":"2023-08-29T13:07:44","date_gmt":"2023-08-29T13:07:44","guid":{"rendered":"https:\/\/gardentoolspares.com\/?post_type=product&#038;p=14603"},"modified":"2026-07-20T12:06:15","modified_gmt":"2026-07-20T12:06:15","slug":"yamaha-mercury-9-9-hp-70-hp-outboard-thermostat-cover-gasket","status":"publish","type":"product","link":"https:\/\/gardengeniusparts.com\/gtstest\/product\/yamaha-mercury-9-9-hp-70-hp-outboard-thermostat-cover-gasket\/","title":{"rendered":"YAMAHA MERCURY 9.9 HP &#8211; 70 HP Outboard Thermostat Cover Gasket"},"content":{"rendered":"<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\">The <strong>Gasket Genius thermostat cover gasket<\/strong> fits <strong>Yamaha<\/strong> and <strong>Mercury 9.9 HP - 70 HP<\/strong> outboard engines. It seals the joint between the <strong>thermostat cover<\/strong> and the <strong>cylinder head<\/strong>, ensuring <strong>cooling water<\/strong> flows through the housing without leaking as the <strong>thermostat<\/strong> regulates engine operating temperature. Once this gasket becomes <strong>worn, hardened or damaged<\/strong>, it can no longer hold a tight seal at the joint, allowing <strong>water leakage<\/strong> and a loss of control over <strong>engine operating temperature<\/strong>, which can lead the engine to run <strong>too hot<\/strong> or <strong>too cold<\/strong>. Fitting a new gasket whenever the <strong>thermostat<\/strong> is removed for servicing helps restore a proper seal.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"><strong>Fits specified models:<\/strong><\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" dir=\"auto\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Yamaha 9.9 HP - 70 HP outboard<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">Mercury 9.9 HP - 70 HP outboard<\/li>\n<\/ul>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"auto\"><strong>Replaces part number:<\/strong><\/p>\n<ul class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-disc flex flex-col gap-1 pl-8 mb-3\" dir=\"auto\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">62Y-12414-00<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\">27-824853<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>The <strong>Gasket Genius thermostat cover gasket<\/strong> fits <strong>Yamaha<\/strong> and <strong>Mercury 9.9 HP - 70 HP<\/strong> outboard engines, sealing the <strong>thermostat cover<\/strong> joint against water leakage.<\/p>\n","protected":false},"featured_media":20389,"comment_status":"open","ping_status":"closed","template":"","meta":[],"product_cat":[103,196,5112],"product_tag":[4423,4422,4420,5184,4419,5185,652,392,288,4528,4265,4182,4421,4181,289,4191,2064],"class_list":["post-14603","product","type-product","status-publish","has-post-thumbnail","hentry","product_cat-engine-parts","product_cat-gaskets-4","product_cat-marine-parts","product_tag-27-824853","product_tag-62y-12414-00","product_tag-4420","product_tag-70-hp","product_tag-9-9","product_tag-9-9-hp","product_tag-cover","product_tag-engine","product_tag-gasket","product_tag-gasketgenius","product_tag-hp","product_tag-marine","product_tag-mercury","product_tag-outboard","product_tag-set","product_tag-thermostat","product_tag-yamaha"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.7 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>YAMAHA MERCURY 9.9 - 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