{"product_id":"honda-thermostat-assembly-19301-rna-315-oem-marine-engine-temperature-control-corrosion-resistant","title":"Honda Thermostat Assembly 19301-RNA-315 OEM Marine Engine Temperature Control, Corrosion-Resistant","description":"\u003cp\u003e\u003cstrong\u003eHonda 19301-RNA-315 is the genuine OEM thermostat assembly that maintains proper engine temperature for compatible Honda outboard motors.\u003c\/strong\u003e\u003c\/p\u003e\n\n\u003cp\u003eKeep your Honda marine engine running in its ideal temperature band with this factory-original thermostat assembly. Built to the same specifications used in Honda manufacturing, the 19301-RNA-315 replaces worn or failed thermostats to help protect engine components, improve warm-up time, and support consistent performance on the water. This is an authentic OEM part, not an aftermarket substitute, and it fits Honda models specified by the part number.\u003c\/p\u003e\n\n\u003ch3\u003eHow does this thermostat assembly affect engine temperature control?\u003c\/h3\u003e\n\u003cp\u003eThe thermostat opens and closes in response to coolant temperature to regulate flow through the cooling system. When cold, it stays closed to speed warm-up; once the coolant reaches the designed threshold, it opens to allow circulation and prevent overheating. Using the correct OEM unit ensures the calibrated opening temperature and reliable operation over time.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eFactory-calibrated opening temperature for precise control\u003c\/li\u003e\n  \u003cli\u003eDesigned to reduce thermal stress during warm-up\u003c\/li\u003e\n  \u003cli\u003eResistance to corrosion from marine environments\u003c\/li\u003e\n  \u003cli\u003eDirect replacement for vehicles requiring 19301-RNA-315\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWill this Honda thermostat fit my engine and how do I confirm compatibility?\u003c\/h3\u003e\n\u003cp\u003eCompatibility is determined by the engine model and serial numbers referenced in Honda parts manuals. Check your engine’s parts diagram or contact a Honda dealer with your model\/year to confirm that 19301-RNA-315 is correct. Installing the exact OEM part avoids fitment problems and eliminates guesswork associated with aftermarket alternatives.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eCompare part number 19301-RNA-315 with your parts manual\u003c\/li\u003e\n  \u003cli\u003eProvide engine model and serial number to confirm fit\u003c\/li\u003e\n  \u003cli\u003eOEM form factor ensures proper sealing and mounting\u003c\/li\u003e\n  \u003cli\u003eDealer assistance available for verification\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eWhat are the visible differences between this OEM thermostat and aftermarket options?\u003c\/h3\u003e\n\u003cp\u003eGenuine Honda thermostats are produced to factory quality standards and materials, so dimensions, valve action, and corrosion resistance match original specifications. Aftermarket units may vary in calibration, materials, or finish, which can affect longevity and performance. Choosing the OEM assembly minimizes risk of premature failure or improper temperature regulation.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eExact OEM dimensions and mounting points for trouble-free installation\u003c\/li\u003e\n  \u003cli\u003eMaterials and finishes selected for marine durability\u003c\/li\u003e\n  \u003cli\u003eConsistent thermal calibration versus variable aftermarket tolerances\u003c\/li\u003e\n  \u003cli\u003eBacked by Honda part identification and dealer sourcing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eHow should I install and maintain the thermostat for best results?\u003c\/h3\u003e\n\u003cp\u003eInstallation should follow Honda service instructions, including proper gasket sealing, torque specifications, and coolant system bleed procedures. Routine inspection during scheduled maintenance helps catch leaks, corrosion, or sticking early. Replace the thermostat when symptoms like extended warm-up, overheating, or coolant leaks indicate failure.\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eUse Honda-recommended gaskets and torque specs\u003c\/li\u003e\n  \u003cli\u003eBleed the cooling system of air after installation\u003c\/li\u003e\n  \u003cli\u003eInspect for corrosion or seal degradation during service\u003c\/li\u003e\n  \u003cli\u003eReplace if temperature regulation or coolant flow is compromised\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003cp\u003eWho is this for: Boaters and marine technicians who operate or service Honda outboard engines and require an exact, factory-grade replacement part. If you need reliable temperature control, peace of mind from OEM fitment, and long-term durability in salt or freshwater conditions, the Honda 19301-RNA-315 thermostat assembly is designed for your maintenance needs.\u003c\/p\u003e\n\n\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003egenuine oem factory part\u003c\/li\u003e\n  \u003cli\u003eexact fit\u003c\/li\u003e\n  \u003cli\u003edurable\u003c\/li\u003e\n  \u003cli\u003ebest in quality\u003c\/li\u003e\n  \u003cli\u003ethis is not an aftermarket part\u003c\/li\u003e\n  \u003cli\u003eOEM\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is 19301-RNA-315 a genuine Honda part?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Yes — 19301-RNA-315 is an OEM Honda thermostat assembly, not an aftermarket replacement.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: How do I know when to replace the thermostat?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Replace when you notice overheating, prolonged warm-up, coolant leaks, or visible corrosion affecting operation.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"Honda","offers":[{"title":"Default Title","offer_id":48083139887262,"sku":"B00IMLBDCI","price":47.0,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0781\/2041\/9486\/files\/honda-thermostat-19301-rna-315-front-view.jpg?v=1785826228","url":"https:\/\/northtrailauto.ca\/products\/honda-thermostat-assembly-19301-rna-315-oem-marine-engine-temperature-control-corrosion-resistant","provider":"North Trail Auto","version":"1.0","type":"link"}