{"product_id":"martyr-cmx07m-magnesium-streamline-shaft-anode-1-1-2in-194-cmx07m","title":"Martyr CMX07M Magnesium Streamline Shaft Anode – 1-1\/2\" Shaft | Stainless Allen Screw | Freshwater","description":"\u003ch2\u003eMartyr CMX07M Magnesium Streamline Shaft Anode\u003c\/h2\u003e\n\u003cp\u003eThe correct sacrificial shaft anode for 1-1\/2\" prop shafts in freshwater. Magnesium is the only alloy with sufficient electrochemical activity to protect your shaft in low-conductivity freshwater — zinc and aluminum anodes go passive in freshwater and provide little to no galvanic protection. The streamlined, hydrodynamic profile keeps drag to a minimum, and the stainless steel Allen head screw holds the anode firmly in place all season.\u003c\/p\u003e\n\n\u003ch3\u003eCompatible Applications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e1-1\/2\" (38mm) diameter prop shafts\u003c\/li\u003e\n\u003cli\u003eFreshwater use only (lakes, rivers, reservoirs)\u003c\/li\u003e\n\u003cli\u003eInboard and inboard\/outboard (I\/O) vessels\u003c\/li\u003e\n\u003cli\u003eReplaces OEM shaft anodes on most standard 1-1\/2\" shaft configurations\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e CMX07M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSKU:\u003c\/strong\u003e 194-CMX07M\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Magnesium alloy (sacrificial)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eShaft Diameter:\u003c\/strong\u003e 1-1\/2\" (38mm)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFastener:\u003c\/strong\u003e Stainless steel Allen head screw\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfile:\u003c\/strong\u003e Streamlined \/ hydrodynamic\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBest For:\u003c\/strong\u003e Freshwater only\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e ~250 g\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAlso Available In\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/martyr-cmx07-zinc-streamline-shaft-anode-1-1-2in-194-cmx07\"\u003eCMX07 – 1-1\/2\" Zinc\u003c\/a\u003e (saltwater)\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"\/products\/martyr-cmx07al-aluminum-streamline-shaft-anode-1-1-2in-194-cmx07al\"\u003eCMX07AL – 1-1\/2\" Aluminum\u003c\/a\u003e (saltwater \u0026amp; brackish)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eAdjacent Sizes – Magnesium\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martyr-cmx06m-magnesium-streamline-shaft-anode-1-3-8in-194-cmx06m\"\u003eCMX06M – 1-3\/8\" Magnesium Shaft Anode\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martyr-cmx08m-streamlined-shaft-anode-with-stainless-steel-allen-head-magnesium-194-cmx08m\"\u003eCMX08M – 1-3\/4\" Magnesium Shaft Anode\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/products\/martyr-cmx05m-magnesium-streamline-shaft-anode-1-1-4in-194-cmx05m\"\u003eCMX05M – 1-1\/4\" Magnesium Shaft Anode\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003eThe CMX07M is the right anode for any 1-1\/2\" shaft running in freshwater. The 1-1\/2\" size is found on larger single-screw inboards, twin-screw cruisers, and some commercial vessels — and it’s a size where zinc anodes are frequently installed on freshwater boats by mistake. Zinc simply doesn’t work in freshwater; it passivates and stops sacrificing, leaving the shaft and cutlass bearing unprotected. If you’re seeing corrosion on a freshwater vessel with zinc shaft anodes, switching to magnesium is the fix.\u003c\/p\u003e\n\u003cp\u003eThe 1-1\/2\" magnesium anode is a less commonly stocked size, so ordering ahead of a haulout is recommended. For saltwater or brackish water, use the \u003ca href=\"\/products\/martyr-cmx07al-aluminum-streamline-shaft-anode-1-1-2in-194-cmx07al\"\u003eCMX07AL aluminum version\u003c\/a\u003e for coastal and mixed-salinity conditions, or the \u003ca href=\"\/products\/martyr-cmx07-zinc-streamline-shaft-anode-1-1-2in-194-cmx07\"\u003eCMX07 zinc version\u003c\/a\u003e for open-ocean saltwater.\u003c\/p\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":50999092215844,"sku":"194-CMX07M","price":37.89,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/194-CMX03_437d03fc-20fd-45fe-b921-293b828fb160.jpg?v=1782799305","url":"https:\/\/marisolmarine.com\/products\/martyr-cmx07m-magnesium-streamline-shaft-anode-1-1-2in-194-cmx07m","provider":"Marisol Marine Company","version":"1.0","type":"link"}