{"product_id":"6bta-5-9-cummins-marine-short-block","title":"6BTA (5.9L) Marine Short Block Diesel Crate Engine Choate Performance","description":"\u003ch2 data-path-to-node=\"0\"\u003e6BTA (5.9L) Marine Short Block Engine\u003c\/h2\u003e\n\u003cp data-path-to-node=\"1\"\u003eThe 6BTA Marine Short Block Engine is engineered for uncompromised reliability in the harshest saltwater environments. Built to serve both heavy-duty commercial fishing vessels and high-performance recreational cruisers, this short block provides a solid, precision-machined foundation for your custom marine build or re-power project.\u003c\/p\u003e\n\u003ch3 data-path-to-node=\"3\"\u003eKey Features\u003c\/h3\u003e\n\u003cul data-path-to-node=\"4\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,0,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,0,0\"\u003eVibration Mitigation:\u003c\/b\u003e A dynamically balanced rotating assembly ensures your vessel runs quiet and smooth, eliminating harmful harmonics that stress your transmission and drive gear.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,1,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,1,0\"\u003eCorrosion Resistance:\u003c\/b\u003e Precision-machined billet freeze plugs are installed to permanently eliminate the \"rot-out\" common with standard brass or steel expansion plugs in marine applications.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"4,2,0\"\u003e\u003cb data-index-in-node=\"0\" data-path-to-node=\"4,2,0\"\u003eBlueprinted Precision:\u003c\/b\u003e Every short block undergoes rigorous CNC machining to correct factory OEM flaws, maximizing oil flow, bearing life, and operational durability under continuous heavy loads.\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"6\"\u003eMachining Process\u003c\/h3\u003e\n\u003cp data-path-to-node=\"7\"\u003e\u003cspan\u003eAt Choate Engineering Performance, we don’t just \"overhaul\" marine engines, we remanufacture them to surpass original factory specifications. Our 6BTA marine engines undergo rigorous CNC blueprinting to correct OEM flaws, ensuring the ultimate reliability required for offshore and coastal applications.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"7\"\u003e \u003c\/p\u003e\n\u003ch4 data-path-to-node=\"8\"\u003eEngine Block Machining\u003c\/h4\u003e\n\u003cp data-path-to-node=\"9\"\u003e\u003cspan\u003eEach of our engine blocks are CNC blueprint machined using state-of-the-art CNC machines. This process ensures perfect dimensions, precise tolerances, and optimal alignment. This starts with decking the surface of the block to achieve the necessary flatness and smoothness (Ra 30 or better) required for flawless sealing with MLS head gaskets. The cylinders are then diamond honed to an extremely tight tolerance to match the piston diameter (within the nearest 0.0001 inch). Following honing, the main bearing bores are line honed to establish a true, straight centerline for the crankshaft. Finally, the cylinder bores are bored to a true 90 degree angle from the crankshaft centerline.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"9\"\u003e \u003c\/p\u003e\n\u003ch4 data-path-to-node=\"11\"\u003eRotational Assembly Balancing\u003c\/h4\u003e\n\u003cp data-path-to-node=\"12\"\u003e\u003cspan\u003eThe balancing of the rotational assembly is crucial for eliminating vibration and maximizing engine longevity. This precision work involves checking and correcting the balance of the crankshaft, connecting rods, and pistons. The crankshaft is thoroughly checked for run-out and inspected for fatigue before being polished and ground to strict concentricity tolerances (0.0005 or less) to ensure the new bearings receive the best possible surface. Rods are inspected and conditioned, and all bearing clearances checked to ensure proper fitment with the new bearings. Each of the pistons, rings, and pin retainers are meticulously weight matched (to a tolerance of 2 grams or less) prior to crank balancing. Then the entire assembly is dynamically balanced on specialized equipment. This ensures that the engine runs smoothly, minimizing stress on the bearings, and extends the overall life of the components.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp data-path-to-node=\"12\"\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"15\"\u003eComponents and Parts Included\u003c\/h3\u003e\n\u003ch4 data-path-to-node=\"16\"\u003eEngine Core Components\u003c\/h4\u003e\n\u003cul data-path-to-node=\"17\"\u003e\n\u003cli\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eCylinder Block\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eCrankshaft\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eSteel Connecting Rods\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eCamshaft\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eNew Pistons\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eNew Main Bearings\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eNew Rod Bearings\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eNew Cam Bearings\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eMain Bolts\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eBillet Freeze Plugs\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eNew Oil Pump\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eUpper Oil Pan\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eLower Oil Pan\u003c\/p\u003e\n\u003cp class=\"query-text-line ng-star-inserted\"\u003eGaskets and Seals\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4 data-path-to-node=\"18\"\u003eGaskets and Seals\u003c\/h4\u003e\n\u003cul data-path-to-node=\"19\"\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"19,0,0\"\u003eRear Main Seal and Housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cp data-path-to-node=\"19,1,0\"\u003eFront Gear Housing\u003c\/p\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch3 data-path-to-node=\"21\"\u003eMarine-Grade Confidence: 2-Year \/ 2,000-Hour Warranty\u003c\/h3\u003e\n\u003cp data-path-to-node=\"22\"\u003eWhen you’re miles offshore, reliability isn’t optional, it’s essential. At Choate Engineering Performance, we stand behind our precision engineering with a comprehensive \u003cb data-index-in-node=\"169\" data-path-to-node=\"22\"\u003e2-Year \/ 2,000-Hour Warranty\u003c\/b\u003e.\u003c\/p\u003e\n\u003cp data-path-to-node=\"23\"\u003eMarine environments subject engines to extreme conditions, from continuous high-idle trolling to sudden wide-open throttle maneuvers. Our warranty is designed to give you complete peace of mind, ensuring your investment is protected against defects in materials and workmanship whether you operate commercially or recreationally.\u003c\/p\u003e","brand":"choateperformance","offers":[{"title":"Default Title","offer_id":67400133411120,"sku":"CEP59CMS","price":6700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0941\/2680\/1200\/files\/6BTA_5.9_MarineShortBlock.png?v=1784928982","url":"https:\/\/choateperformance.com\/products\/6bta-5-9-cummins-marine-short-block","provider":"choateperformance","version":"1.0","type":"link"}