{"product_id":"183506-water-pump-for-gm-marine-small-block-4-3l-5-0l-5-7l-183583-183599","title":"183506 Water Pump For GM Marine Small Block 4.3L 5.0L 5.7L 183583 183599","description":"\u003cstrong\u003eThis Water Pump is a marine raw-water pump compatible with GM Small Block 4.3L, 5.0L, and 5.7L engines and matches OEM Part# 18-3506, 18-3583, 18-3599.\u003c\/strong\u003e\u003ch2\u003eProduct Overview\u003c\/h2\u003e\u003cp\u003eThis water pump is a direct replacement marine raw-water pump designed for GM Small Block V6 and V8 engines used in inboard and sterndrive applications. It delivers reliable coolant circulation to prevent overheating and ensure consistent engine performance on the water. Boaters and marine mechanics trust this pump for its OEM-equivalent fit and durable construction.\u003c\/p\u003e\u003ch3\u003eKey Features \u0026amp; Performance\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003ePrecision-engineered cast-iron housing resists corrosion in marine environments\u003c\/li\u003e\n\u003cli\u003eDirect OEM replacement – no modifications needed for installation\u003c\/li\u003e\n\u003cli\u003eIncludes gasket and mounting hardware where applicable for a complete install\u003c\/li\u003e\n\u003cli\u003eDesigned for continuous duty in saltwater or freshwater cooling systems\u003c\/li\u003e\n\u003cli\u003eMeets or exceeds OEM flow rate specifications for proper engine cooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment \u0026amp; Compatibility\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eGM Small Block 4.3L V6 marine engines\u003c\/li\u003e\n\u003cli\u003eGM Small Block 5.0L V8 marine engines\u003c\/li\u003e\n\u003cli\u003eGM Small Block 5.7L V8 marine engines\u003c\/li\u003e\n\u003cli\u003eReplaces OEM Part Numbers: 18-3506, 18-3583, 18-3599\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eCommon Uses\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003eReplacement water pump for inboard marine engines\u003c\/li\u003e\n\u003cli\u003eRepair and maintenance for sterndrive cooling systems\u003c\/li\u003e\n\u003cli\u003eRestoration of classic GM-powered boats\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003ePart Number(s):\u003c\/strong\u003e 18-3506, 18-3583, 18-3599\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine Type:\u003c\/strong\u003e GM Small Block V6\/V8 Marine\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eDisplacement:\u003c\/strong\u003e 4.3L, 5.0L, 5.7L\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHousing Material:\u003c\/strong\u003e Cast Iron\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Marine Raw Water Cooling\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Is this water pump a direct bolt-on replacement?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, it is designed as a direct OEM replacement and includes the necessary gasket for installation on compatible GM marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eQ:\u003c\/strong\u003e Does this pump work for both fresh and saltwater?\u003cstrong\u003e A:\u003c\/strong\u003e Yes, the cast-iron construction is suitable for both fresh and saltwater environments, though regular flushing is recommended after saltwater use.\u003c\/p\u003e\u003cp\u003e\u003cem\u003eProduct appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.\u003c\/em\u003e\u003c\/p\u003e","brand":"DURAFORCE","offers":[{"title":"Default Title","offer_id":53676850479377,"sku":"ZZ2Y02308","price":174.79,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0250\/2446\/2929\/files\/57_39ba8b41-ca24-49df-877d-f976bc7001de.jpg?v=1781579448","url":"https:\/\/www.duraforce.com\/products\/183506-water-pump-for-gm-marine-small-block-4-3l-5-0l-5-7l-183583-183599","provider":"DURAFORCE","version":"1.0","type":"link"}