{"product_id":"retrol-d16-horizontal-diesel-engine-upgrade-kit","title":"Retrol D16 Horizontal Diesel Engine Upgrade Kit","description":"\u003c!-- PRODUCT TITLE --\u003e\n\u003ch1\u003eRetrol D16 Engine Upgrade Parts Kit (D16 V1 \/ D16 V2 \/ D16 V3 Update)\u003c\/h1\u003e\n\n\u003chr\u003e\n\n\u003c!-- CLEAR UPGRADE \u0026 SHOPPING GUIDE --\u003e\n\u003cdiv class=\"upgrade-guide\" style=\"background-color: #f8f9fa; padding: 18px; border: 2px solid #0056b3; border-radius: 6px; margin-bottom: 20px;\"\u003e\n  \u003ch3 style=\"margin-top: 0; color: #0056b3;\"\u003e🔧 Important Upgrade \u0026amp; Compatibility Notice\u003c\/h3\u003e\n  \u003cp style=\"margin-bottom: 12px; font-weight: bold;\"\u003eTo upgrade your engine to the latest D16 V3 version, please read the instructions below based on your current D16 model and where you purchased it:\u003c\/p\u003e\n  \n  \u003cdiv style=\"background-color: #ffffff; padding: 12px; border-left: 4px solid #28a745; margin-bottom: 12px; border-radius: 3px;\"\u003e\n    \u003ch4 style=\"margin: 0 0 6px 0; color: #28a745;\"\u003e✅ Purchased your D16 Engine from Stirlingkit?\u003c\/h4\u003e\n    \u003cp style=\"margin: 0; line-height: 1.5;\"\u003e\n      • \u003cstrong\u003eIf you have a D16 V1 (with exhaust smoke stack):\u003c\/strong\u003e Simply buy the \u003cstrong\u003e\"V2 to V3 Upgrade Kit\"\u003c\/strong\u003e. Our warehouse team will automatically include the \u003cstrong\u003eV1 to V2 upgrade kit in your parcel FOR FREE\u003c\/strong\u003e! You do NOT need to pay extra for the V1 to V2 kit.\u003cbr\u003e\n      • \u003cstrong\u003eIf you have a D16 V2 (without smoke stack):\u003c\/strong\u003e Buy the \u003cstrong\u003e\"V2 to V3 Upgrade Kit\"\u003c\/strong\u003e directly to complete your upgrade.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\n  \u003cdiv style=\"background-color: #ffffff; padding: 12px; border-left: 4px solid #dc3545; border-radius: 3px;\"\u003e\n    \u003ch4 style=\"margin: 0 0 6px 0; color: #dc3545;\"\u003e🛒 Purchased your D16 Engine Elsewhere?\u003c\/h4\u003e\n    \u003cp style=\"margin: 0; line-height: 1.5;\"\u003e\n      • \u003cstrong\u003eIf you have a D16 V1 (with exhaust smoke stack):\u003c\/strong\u003e To upgrade to D16 V3, you MUST first complete the V1 to V2 upgrade. Please add \u003cstrong\u003eBOTH\u003c\/strong\u003e the \u003cstrong\u003e\"V1 to V2 Upgrade Kit\"\u003c\/strong\u003e AND the \u003cstrong\u003e\"V2 to V3 Upgrade Kit\"\u003c\/strong\u003e to your cart and purchase them together.\u003cbr\u003e\n      • \u003cstrong\u003eIf you have a D16 V2 (without smoke stack):\u003c\/strong\u003e Simply buy the \u003cstrong\u003e\"V2 to V3 Upgrade Kit\"\u003c\/strong\u003e.\n    \u003c\/p\u003e\n  \u003c\/div\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003c!-- PAIN-POINT DRIVEN DESCRIPTION --\u003e\n\u003cdiv class=\"product-description\"\u003e\n  \u003ch2\u003eTired of Hard Starts, Compression Loss, and Inefficient Combustion on Your Retrol D16?\u003c\/h2\u003e\n  \u003cp\u003eIf your Retrol D16 engine is struggling with inconsistent idling, fuel leakage, low compression, or loose valve action after hours of running, it’s time for a proper performance refresh. Standard or worn-out factory parts often lead to poor fuel atomization, inefficient intake\/exhaust timing, and frustrating starting sequences.\u003c\/p\u003e\n  \n  \u003cp\u003eThis \u003cstrong\u003eD16 Generation Upgrade Kit\u003c\/strong\u003e is specifically engineered to solve those exact mechanical bottlenecks:\u003c\/p\u003e\n  \n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNo More Fuel Dripping or Misfires:\u003c\/strong\u003e The redesigned D16 V3 fuel injector assembly and leak-proof fuel line set deliver ultra-fine fuel atomization, ensuring rapid ignition, cleaner combustion, and smoother throttle response.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eRestore Peak Compression \u0026amp; Power:\u003c\/strong\u003e The high-precision cylinder head paired with upgraded, tight-sealing valves eliminates pressure leaks, giving your engine the compression punch it needs for stable 4-stroke operation.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSmoother Valve Train \u0026amp; Reduced Wear:\u003c\/strong\u003e The updated rocker arms (featuring high-durability rollers and fine-tune adjusters) eliminate excess slack, reduce friction on the pushrods, and quiet down harsh mechanical noise.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eDirect Fit Assembly:\u003c\/strong\u003e Includes all necessary structural components, fittings, screws, and O-rings for a seamless upgrade path.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003c!-- KEY FEATURES --\u003e\n\u003cdiv class=\"key-features\"\u003e\n  \u003ch2\u003e🌟 Key Features\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTailored for Retrol D16:\u003c\/strong\u003e Exclusively designed as a high-precision performance upgrade set for the Retrol D16 Horizontal 4-Stroke Diesel Stationary Engine Model.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNext-Gen Fuel Atomization System:\u003c\/strong\u003e Upgraded fuel injector assembly (injector body, needle, spring, pressure cap, and connector) paired with a high-pressure fuel line set for optimal fuel delivery.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eUpgraded Valve \u0026amp; Rocker Mechanism:\u003c\/strong\u003e Features a newly optimized cylinder head, dual valves, high-durability springs, and a full rocker arm system with built-in rollers and adjusters.\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003ePrecision Engineering:\u003c\/strong\u003e Crafted from premium metal materials designed to withstand elevated temperature and pressure, ensuring smooth mechanical motion and extended engine lifespan.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003c!-- PACKING LIST TABLE (V2 to V3 Upgrade Kit) --\u003e\n\u003cdiv class=\"packing-list\"\u003e\n  \u003ch2\u003e📦 Package Includes (V2 → V3 Performance Kit)\u003c\/h2\u003e\n  \u003ctable border=\"1\" cellpadding=\"8\" cellspacing=\"0\" style=\"border-collapse: collapse; width: 100%;\"\u003e\n    \u003cthead\u003e\n      \u003ctr style=\"background-color: #f2f2f2;\"\u003e\n        \u003cth style=\"text-align: left;\"\u003eComponent Name\u003c\/th\u003e\n        \u003cth style=\"text-align: center;\"\u003eQty\u003c\/th\u003e\n      \u003c\/tr\u003e\n    \u003c\/thead\u003e\n    \u003ctbody\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCylinder Head\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFuel Injector Main Body\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInjector Needle\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInjector Spring\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNeedle Spring Pressure Cap\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eNeedle Screw\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eInjector Connector\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFuel Line Compression Fittings\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFuel Line Fitting Screws\/Nuts\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eFuel Line Hose\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eValves\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eValve Springs\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eSpring Retainers\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e4 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eValve Retainer Clips \/ Keepers\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eO-Ring Seal\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRocker Arms\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRocker Arm Rollers\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRoller Pins\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRocker Arm Pin\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 pc\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eRocker Arm Adjusters\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e2 pcs\u003c\/td\u003e\n\u003c\/tr\u003e\n      \u003ctr\u003e\n\u003ctd\u003eCamshaft Bracket Set\u003c\/td\u003e\n\u003ctd style=\"text-align: center;\"\u003e1 set\u003c\/td\u003e\n\u003c\/tr\u003e\n    \u003c\/tbody\u003e\n  \u003c\/table\u003e\n\u003c\/div\u003e\n\n\u003chr\u003e\n\n\u003c!-- SPECIFICATIONS --\u003e\n\u003cdiv class=\"specifications\"\u003e\n  \u003ch2\u003e⚙️ Specifications\u003c\/h2\u003e\n  \u003cul\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCompatible Engine:\u003c\/strong\u003e Retrol D16 Horizontal 4-Stroke Diesel Stationary Engine\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e Premium Metal (Brass, Alloy Steel, Aluminum) \/ Rubber (O-Ring)\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e 100% Brand New\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNet Weight:\u003c\/strong\u003e Approx. 220g\u003c\/li\u003e\n    \u003cli\u003e\n\u003cstrong\u003eShipping Weight:\u003c\/strong\u003e Approx. 0.35 kg (350g)\u003c\/li\u003e\n  \u003c\/ul\u003e\n\u003c\/div\u003e","brand":"Stirlingkit","offers":[{"title":"V1 to V2 Upgrade Kit","offer_id":54376127201493,"sku":null,"price":69.99,"currency_code":"USD","in_stock":true},{"title":"V2 to V3 Performance Kit","offer_id":54376127234261,"sku":null,"price":179.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0134\/7446\/3808\/files\/stirlingkit-retrol-d16-horizontal-diesel-engine-2nd-gen-upgrade-kit.jpg?v=1785306725","url":"https:\/\/www.stirlingkit.com\/sv\/products\/retrol-d16-horizontal-diesel-engine-upgrade-kit","provider":"Stirlingkit","version":"1.0","type":"link"}