{"product_id":"merc-786","title":"Quicksilver Rust Guard Rust Inhibitor 858081KC2 – 12 oz Spray","description":"\u003ch2\u003eQuicksilver Rust Guard Rust Inhibitor 858081KC2 – 12 oz Spray\u003c\/h2\u003e\n\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 858081KC2 (also listed as 92-858081KC2)\u003cbr\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Quicksilver (Mercury Marine OEM)\u003cbr\u003e\n\u003cstrong\u003eOfficial Product Type:\u003c\/strong\u003e Rust Inhibitor \/ Storage Protection Spray\u003cbr\u003e\n\u003cstrong\u003eSize:\u003c\/strong\u003e 12 oz aerosol spray can\u003cbr\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e Engine Corrosion Protection \u0026amp; Storage\u003cbr\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e New OEM\u003c\/p\u003e\n\n\u003ch3\u003eSupersession Notice\u003c\/h3\u003e\n\u003cp\u003ePart number \u003cstrong\u003e858081KC2\u003c\/strong\u003e has been superseded by \u003cstrong\u003e\u003ca href=\"\/products\/8131425173540\"\u003e858081KC3 – Quicksilver Rust Guard Rust Inhibitor (current version)\u003c\/a\u003e\u003c\/strong\u003e. If you are ordering new stock, the KC3 is the current replacement. The KC2 may still be available while supplies last.\u003c\/p\u003e\n\n\u003ch3\u003eWhat It Does\u003c\/h3\u003e\n\u003cp\u003eQuicksilver Rust Guard is an OEM rust inhibitor spray designed to protect internal and external metal surfaces on marine engines during storage and winterization. It forms a protective barrier against moisture and corrosion, helping prevent rust from developing on engine components that sit idle for extended periods.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMercury and MerCruiser 2-stroke gasoline outboards\u003c\/li\u003e\n\u003cli\u003eMercury and MerCruiser 4-stroke gasoline outboards\u003c\/li\u003e\n\u003cli\u003eMerCruiser sterndrive engines\u003c\/li\u003e\n\u003cli\u003eExternal metal surfaces, linkages, and hardware on marine engines\u003c\/li\u003e\n\u003cli\u003eGeneral marine metal protection during lay-up\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis is a maintenance chemical, not a model-specific hard part. Serial number confirmation is not required. Follow the storage procedure in your engine's owner's manual.\u003c\/p\u003e\n\n\u003ch3\u003eService Interval\u003c\/h3\u003e\n\u003cp\u003eApply once per storage season — at the start of winterization or before any extended lay-up of 30 days or more. Reapply as needed if the engine is stored in a high-humidity environment.\u003c\/p\u003e\n\n\u003ch3\u003eSupersedes \/ Related Part Numbers\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e858081KC2\u003c\/strong\u003e — this listing (superseded)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e92-858081KC2\u003c\/strong\u003e — alternate prefix format, same part\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e\u003ca href=\"\/products\/8131425173540\"\u003e858081KC3\u003c\/a\u003e\u003c\/strong\u003e — current replacement part (Quicksilver Rust Guard, updated version)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eKit Contents\u003c\/h3\u003e\n\u003cp\u003eSingle 12 oz aerosol spray can. No additional components included.\u003c\/p\u003e\n\n\u003ch3\u003eRelated Products\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131425173540\"\u003eQuicksilver Rust Guard Rust Inhibitor 12 oz – 858081KC3 (Current Version)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131425108004\"\u003eMercury Fogging Oil 858081K03 – 12 oz Storage Protection Spray\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/8131438084132\"\u003eMercury Antifreeze –50°F, 1 Gallon – 8M0073201\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e Rust Guard is ideal for protecting external metal surfaces, linkages, throttle cables, and exposed hardware during winter storage — areas that fogging oil doesn't reach. Use it alongside fogging oil and antifreeze for a complete winterization. It's also useful mid-season on boats stored in saltwater environments where corrosion accelerates quickly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCommon Mistakes:\u003c\/strong\u003e Customers sometimes confuse Rust Guard (KC2\/KC3) with Fogging Oil (K03) — they serve different purposes. Fogging oil goes inside the engine cylinders; Rust Guard protects external surfaces. Don't substitute one for the other. Also note the supersession: if you're ordering for resale or future use, order the KC3 to avoid receiving discontinued stock.\u003c\/p\u003e","brand":"MERC","offers":[{"title":"Default Title","offer_id":43563886051364,"sku":"858081KC1","price":7.15,"currency_code":"CAD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/86096f63-fdbe-4fbf-8512-ffc09d15ce8d.png?v=1787256221","url":"https:\/\/marisolmarine.com\/products\/merc-786","provider":"Marisol Marine Company","version":"1.0","type":"link"}