{"product_id":"mercury-proxs-300-hp-p300-xl-cxl-v8-cms-4-zamanli-yuksek-performans-extra-uzun-saft-distan-takma-deniz-motoru","title":"Mercury 300 HP ProXS V8 Electric Start Steering Trim Tilt Extra Long Shaft Outboard Motor","description":"\u003cp\u003eThe Mercury \u003cstrong\u003e300 XL ProXS V8\u003c\/strong\u003e is a 4-stroke outboard marine engine designed for sport fishing boats requiring an extra-long shaft, speed-focused fiberglass boats, and performance-oriented users. It features a 300 HP \/ 224 kW and 4600 cc V8 (8 Cylinder) engine. The ProXS series is Mercury's lineup that offers optimized high-performance configurations compared to standard FourStroke engines. It is developed for boat use prioritizing speed and responsiveness, with a high RPM range and performance-focused fine-tuning.\u003c\/p\u003e\n\n\u003ch2\u003e300 XL ProXS V8 Series Features and Technology Advantages\u003c\/h2\u003e\n\u003cp\u003eProXS models operate in a higher RPM range compared to their standard FourStroke counterparts. Performance-oriented ECU calibration shifts the power band to higher RPMs, increasing responsiveness and top speed.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eV8 (8 Cylinder) Engine (4600 cc):\u003c\/strong\u003e ProXS models operate in a higher RPM range compared to their standard FourStroke counterparts.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExtra-Long Shaft (572 mm (22.5\")):\u003c\/strong\u003e Propeller operates at optimum depth with correct transom height.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProXS Performance Configuration:\u003c\/strong\u003e Enhanced responsiveness and maximum speed with a high RPM range and optimized ECU calibration.\u003c\/li\u003e\n\n\u003cli\u003e\n\u003cstrong\u003eElectric Start:\u003c\/strong\u003e Instant activation with key or button — comfortable and quick starting.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower Trim \u0026amp; Tilt:\u003c\/strong\u003e Adjust trim angle with a button while cruising — optimizes fuel efficiency; fully raise the engine with tilt.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExternal Floating Fuel System:\u003c\/strong\u003e Connection for large-capacity external tank — range determined by user needs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eExtra-Long Shaft — Which Boat Type Is It Suitable For?\u003c\/h2\u003e\n\u003cp\u003eAn extra-long shaft (572 mm (22.5\")) allows the propeller to operate at the correct water depth on large, high-sided fiberglass and aluminum boats. It is 64 mm longer than the standard long shaft (508 mm).\u003c\/p\u003e\n\n\u003ch2\u003eTechnical Specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 HP \/ 224 kW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplacement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4600 cc\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCylinder Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eV8 (8 Cylinder)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eEngine Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4-stroke, High-Performance V8, DOHC, 32 valve, EFI electronic fuel injection\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShaft Length\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExtra-Long Shaft \/ 572 mm (22.5\")\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eGear System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eF – N – R (Forward \/ Neutral \/ Reverse)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStarting System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eElectric\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTrim System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower Trim \u0026amp; Tilt\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eFuel System\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal floating system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight (Dry)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e232 KG\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eControl Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTiller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel Code\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e300 XL ProXS V8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\n\u003ch2\u003eWho Is This Engine For?\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eSport fishing boats:\u003c\/strong\u003e fast planning and quick positioning with a high RPM range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance-oriented fiberglass boats:\u003c\/strong\u003e increased responsiveness and speed with ProXS calibration.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTournament fishing:\u003c\/strong\u003e fast relocation and efficient fuel use.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBoat owners who want speed and performance:\u003c\/strong\u003e a superior performance tier compared to standard FourStroke.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eMaintenance and Longevity\u003c\/h2\u003e\n\u003cp\u003e4-stroke Mercury engines operate smoothly for many years with regular oil changes and end-of-season maintenance protocols. The impeller of the water-cooled system should be checked every 100 hours or every two seasons. In saltwater use, fresh water rinsing is mandatory after each use.\u003c\/p\u003e\n\u003cp\u003eRelated maintenance categories: \u003ca href=\"\/en-eu\/collections\/bakim-kiti\"\u003eMaintenance Kit\u003c\/a\u003e | \u003ca href=\"\/en-eu\/collections\/motor-yagi\"\u003eEngine Oil\u003c\/a\u003e | \u003ca href=\"\/en-eu\/collections\/impeller\"\u003eImpeller\u003c\/a\u003e | \u003ca href=\"\/en-eu\/collections\/mercury-yedek-parca\"\u003eMercury Spare Parts\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\n\n\u003ch3\u003eWhat is the difference between ProXS and standard FourStroke 300 HP?\u003c\/h3\u003e\n\u003cp\u003eProXS models offer the same engine block with a higher RPM range and performance-oriented ECU calibration. Compared to the standard model, it provides a higher maximum RPM, increased responsiveness, and superior top speed performance. Fuel consumption might be slightly higher at wide-open throttle.\u003c\/p\u003e\n\n\u003ch3\u003eWhich propeller works best with a ProXS engine?\u003c\/h3\u003e\n\u003cp\u003eSince ProXS models are optimized for a high RPM range, a propeller with a lower pitch is generally preferred. Propeller selection should be determined by a Mercury service technician based on boat type, weight, and the desired balance of speed and acceleration.\u003c\/p\u003e\n\n\u003ch3\u003eAre ProXS maintenance requirements different from standard FourStroke?\u003c\/h3\u003e\n\u003cp\u003eBasic maintenance requirements are similar: regular oil changes, impeller checks, and end-of-season maintenance. However, due to high RPM use, more attention to oil quality is recommended. Service intervals should be followed according to manufacturer recommendations.\u003c\/p\u003e\n\n\u003ch3\u003eWhich boat and hull brands are compatible with the 300 XL ProXS V8?\u003c\/h3\u003e\n\u003cp\u003eMercury outboard motors are compatible with many fiberglass, aluminum, and inflatable boat models thanks to their universal transom clamp or transom mounting system. The only criteria are your boat's 572 mm (22.5\") transom height and the maximum engine power approved by the manufacturer. You can get compatibility confirmation from Clever Marin by sharing your boat model.\u003c\/p\u003e\n\n\u003ch2\u003eRelated Products and Categories\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/mercury-distan-takma-motorlar\"\u003eMercury Outboard Motors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/mercury-urunleri\"\u003eMercury Marine Products\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/mercury-yedek-parca\"\u003eMercury Spare Parts\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/proxs-115-150hp-motorlar\"\u003eMercury ProXS 115–150 HP\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/fourstroke-175-300-hp\"\u003eMercury 175–300 HP FourStroke\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/distan-takma-motorlar\"\u003eOutboard Motors\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/tekne-motorlari\"\u003eBoat Engines\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/bakim-kiti\"\u003eMaintenance Kit\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/impeller\"\u003eImpeller\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/en-eu\/collections\/anot\"\u003eAnode\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch2\u003eIs This the Right Configuration for Your Boat?\u003c\/h2\u003e\n\u003cp\u003eShare your boat model, transom height, and intended use — let's verify together if the Mercury \u003cstrong\u003e300 XL ProXS V8\u003c\/strong\u003e engine is suitable for your boat and ensure the correct shaft selection.\u003c\/p\u003e","brand":"Mercury","offers":[{"title":"Default Title","offer_id":45476761338053,"sku":null,"price":1692999.99,"currency_code":"TRY","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0748\/9332\/8581\/files\/mercury-proxs-p300-xl-cxl-v8-cms-extra-uzun-saft-distan-takma-deniz-motoru-p300proxs.jpg?v=1765271621","url":"https:\/\/clevermarin.com\/en-eu\/products\/mercury-proxs-300-hp-p300-xl-cxl-v8-cms-4-zamanli-yuksek-performans-extra-uzun-saft-distan-takma-deniz-motoru","provider":"CLEVER MARIN","version":"1.0","type":"link"}