{"product_id":"martyr-anodes-1-2-dia-pencil-complete-cme1","title":"Martyr Complete Zinc Engine Pencil Anode with Brass Plug, 1\/2\" x 2\", 3\/8\" NPT [CME1]","description":"\u003cp\u003eComplete zinc pencil anode for engine cooling systems, heat exchangers, oil coolers and aftercoolers. The CME1 comes as a full assembly — a brass plug with the zinc pencil already threaded in — ready to install. Martyr CME anodes meet or exceed the spec of the anodes supplied as original equipment.\u003c\/p\u003e\n\u003cp\u003ePencil zincs sacrifice themselves to protect the more valuable metals in your raw-water cooling system from galvanic corrosion. Check them regularly and replace when about half the zinc is gone.\u003c\/p\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eBrand: Martyr Anodes\u003c\/li\u003e\n\u003cli\u003ePart number: CME1\u003c\/li\u003e\n\u003cli\u003ePencil diameter: 1\/2\"\u003c\/li\u003e\n\u003cli\u003ePencil length: 2\"\u003c\/li\u003e\n\u003cli\u003ePlug thread: 3\/8\" NPT (brass)\u003c\/li\u003e\n\u003cli\u003ePencil-to-plug thread: 3\/8-16 UNC\u003c\/li\u003e\n\u003cli\u003eMaterial: Zinc, die-cast to US military alloy specification\u003c\/li\u003e\n\u003cli\u003eFor use in salt water\u003c\/li\u003e\n\u003cli\u003eUPC: 628309103200\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFitment\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eUse the complete CME1 for a new install, or when the old plug is corroded, rounded off or the zinc has broken off inside it.\u003c\/li\u003e\n\u003cli\u003eAlready have a good plug? Save money with the \u003cstrong\u003eCMEZ1\u003c\/strong\u003e replacement zinc only.\u003c\/li\u003e\n\u003cli\u003eAlways match diameter, length and plug thread to the anode you're replacing — a pencil that's too long can block coolant passages.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eWhy zinc for pencil anodes\u003c\/h4\u003e\n\u003cp\u003eZinc is the standard for engine pencil anodes and what most engine manufacturers specify. Aluminum pencils are prone to breaking off at the neck, and the broken piece can end up lodged in coolant passages.\u003c\/p\u003e\n\u003ch4\u003eInstall tips\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eClose the raw-water seacock and let the engine cool before removing the old anode.\u003c\/li\u003e\n\u003cli\u003eUse pipe thread sealant on the plug's NPT threads only. Don't put sealant or tape between the zinc and the plug — it can insulate the zinc and stop it working.\u003c\/li\u003e\n\u003cli\u003eSnug the plug down without over-tightening the brass, open the seacock and check for leaks after starting the engine.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"Martyr Anodes","offers":[{"title":"Default Title","offer_id":50642972278959,"sku":"CME1","price":12.29,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1680\/8011\/files\/martyranodes-cme1-01.jpg?v=1791824061","url":"https:\/\/onboardmarinegoods.com\/products\/martyr-anodes-1-2-dia-pencil-complete-cme1","provider":"OnBoard Rigging","version":"1.0","type":"link"}