{"product_id":"express-mach4-propeller-15-3x13-4-blade-stainless-lh-rotation","title":"Express Mach4 Propeller 15.3x13 – 4-Blade Stainless Steel, LH (Counter) Rotation","description":"\u003ch2\u003eExpress Mach4 15.3\" x 13\" 4-Blade Stainless Steel Propeller – Left Hand (Counter) Rotation\u003c\/h2\u003e\n\u003cp\u003eThe Express Mach4 is a race-proven stainless steel propeller engineered for high-performance applications where acceleration, stern lift, and rough-water handling matter most. The 4-blade design delivers faster hole shots, better load-carrying ability, and a smoother, more planted ride compared to 3-blade alternatives — all backed by proprietary TP17™ stainless steel and precision casting technology.\u003c\/p\u003e\n\u003cp\u003eThis 15.3\" x 13\" left-hand (counter) rotation version is designed for dual-engine setups and specific engine configurations that require counter-rotating props. Always verify rotation direction against your engine's requirements before ordering.\u003c\/p\u003e\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTP17™ Proprietary Stainless Steel\u003c\/strong\u003e – A custom alloy formulated for higher strength, superior corrosion resistance, and a mirror-quality finish that holds up in saltwater and freshwater alike.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-Blade Design\u003c\/strong\u003e – Delivers faster acceleration, better stern lift, improved handling in following seas and rough water, and maintains speed more effectively under load compared to 3-blade props.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePerformance-Tuned Geometry\u003c\/strong\u003e – Pitch, rake angles, and exhaust vents are precision-tuned for all-around performance gains across the RPM range.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaxSpeed™ Dyno Balance\u003c\/strong\u003e – Each prop is dynamically balanced to eliminate vibration and maximize smooth power delivery at high RPM.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeft Hand (Counter) Rotation\u003c\/strong\u003e – Engineered for counter-rotating twin-engine setups or specific single-engine applications requiring LH rotation. Confirm your engine's rotation requirement before purchasing.\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eCompatibility \u0026amp; Hub Kits\u003c\/h3\u003e\n\u003cp\u003eRequires a Series 500 or Series 700 hub installation kit (sold separately). Consult the application chart for your specific engine and required kit number. Compatible hub options include the \u003ca href=\"\/products\/11124729151524\"\u003eMasterGuard Hub Kit 500\u003c\/a\u003e, \u003ca href=\"\/products\/11124729282596\"\u003eHub Kit 501\u003c\/a\u003e, \u003ca href=\"\/products\/11124729675812\"\u003eHub Kit 502\u003c\/a\u003e, and the \u003ca href=\"\/products\/11124734689316\"\u003eMasterGuard 700 Series Hub Kit\u003c\/a\u003e. For sound-dampening applications, see the \u003ca href=\"\/products\/11124732559396\"\u003eMasterTorq 800F SDH Hub Kit\u003c\/a\u003e.\u003c\/p\u003e\n\n\u003ch3\u003e3-Blade vs. 4-Blade\u003c\/h3\u003e\n\u003cp\u003eThe 4-blade Mach4 excels in acceleration, load carrying, and rough-water stability. If your priority is maximum top-end speed on a lighter, performance-oriented hull, the \u003ca href=\"\/products\/11124732428324\"\u003eExpress Mach3 3-Blade Stainless (RH)\u003c\/a\u003e or \u003ca href=\"\/products\/11124732624932\"\u003eExpress Mach3 3-Blade Stainless (LH)\u003c\/a\u003e may be worth comparing.\u003c\/p\u003e\n\n\u003chr\u003e\n\u003ch3\u003eParts Desk Insights\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eBest Use Case:\u003c\/strong\u003e Dual-engine setups requiring counter-rotation on the port side, or single-engine applications specified for left-hand rotation. Also ideal for customers running high-HP engines (90–300+hp) who want improved acceleration, better performance in rough water, or are carrying heavy loads regularly.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eConfirm rotation direction first\u003c\/strong\u003e — LH (counter) rotation is not interchangeable with standard RH props. This is the most common ordering mistake on twin-engine boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHub kit is mandatory\u003c\/strong\u003e — do not sell without confirming the customer has a compatible Series 500 or 700 kit. See \u003ca href=\"\/products\/11124729151524\"\u003eHub Kit 500\u003c\/a\u003e, \u003ca href=\"\/products\/11124729282596\"\u003e501\u003c\/a\u003e, \u003ca href=\"\/products\/11124729675812\"\u003e502\u003c\/a\u003e, or \u003ca href=\"\/products\/11124734689316\"\u003e700 Series\u003c\/a\u003e.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e4-blade upsell story\u003c\/strong\u003e — customers upgrading from a 3-blade OEM prop will notice meaningful gains in hole shot, rough-water handling, and load performance. The 4-blade is the right recommendation for pontoons, tri-toons, and heavily loaded boats.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStainless vs. aluminum\u003c\/strong\u003e — customers comparing to the \u003ca href=\"\/products\/11124732493860\"\u003eHustler 4-Blade Aluminum LH\u003c\/a\u003e should know stainless holds pitch better under load, resists flex, and lasts significantly longer in abrasive or saltwater environments.\u003c\/li\u003e\n\u003cli\u003eVerify gearcase diameter and HP range against the application chart before confirming fitment.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"LNS","offers":[{"title":"Default Title","offer_id":51215128068132,"sku":"708-31501340","price":852.69,"currency_code":"CAD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0743\/5799\/7604\/files\/708-31501530_1b58a61d-dc4e-43be-b135-0433f77deb95.jpg?v=1786150358","url":"https:\/\/marisolmarine.com\/products\/express-mach4-propeller-15-3x13-4-blade-stainless-lh-rotation","provider":"Marisol Marine Company","version":"1.0","type":"link"}