Solas 8513-138-21 Aluminum Rear Propeller 13.75" x 21" 4-Blade for Volvo Penta Duo Prop

Solas

<h3>About Solas Science &amp; Engineering</h3><p><strong>Solas Science &amp; Engineering Co., Ltd.</strong> was founded in 1986 by Dr. Solas Y.J. Lin and has since grown into one of the most respected names in marine propulsion worldwide. Headquartered in Taichung, Taiwan, the company combines world-class research and development, highly skilled manufacturing, and rigorous quality control to deliver propellers and impellers that boaters and marine technicians genuinely depend on. What started as a focused engineering venture has become a globally trusted brand built on a single guiding principle: every product that leaves the factory must meet the highest standard of performance and durability.</p><h3>A Heritage of Precision Engineering</h3><p>Solas built its reputation first and foremost in the world of marine propellers. Their catalog spans stainless steel, aluminum, and specialty propeller designs engineered for outboard and stern drive engines across a vast range of boat models. Solas aluminum propellers are manufactured using an advanced squeeze-casting process and subjected to over 500 hours of performance testing — a process that simulates more than six months of real-world use. Each aluminum prop also receives multiple layers of anti-corrosion paint, far exceeding industry norms. On the stainless steel side, Solas uses high-grade alloys with elevated molybdenum, nickel, and chrome content, giving their props exceptional resistance to saltwater corrosion and physical impact. Well-known product series including the Titan, Rubex, Lexor, and Saturn lines reflect decades of iterative design refinement.</p><p>Complementing their propeller lineup, Solas also offers a broad selection of <a href="/5584-solas-propeller-parts-accessories-200817">propeller parts and accessories</a> — including interchangeable Rubex hub kits, hardware, and related components that make installation, tuning, and replacement straightforward for both professional technicians and DIY boaters.</p><h3>PWC &amp; Jet Boat Impeller Leadership</h3><p>Beyond propellers, Solas has earned equal recognition in the personal watercraft and jet boat space with their industry-leading <a href="/5584-solas-impellers-200573">impellers</a>. Engineered from ultra-high-strength stainless steel and cast in one-piece molds for precise pitch geometry, Solas impellers are designed to reduce cavitation, improve pump hookup, and deliver measurable gains in acceleration and top-end speed. Their impeller lineup spans multiple series — including the Super Camber, Concord, Dynafly, and X-Prop — each tuned for different pump types and performance goals. Solas impellers fit popular PWC platforms from Sea-Doo, Yamaha, Kawasaki, Polaris, Honda AquaTrax, and more. The brand&apos;s deep involvement in professional PWC racing — sponsoring world-class competitors across multiple racing disciplines — has driven continuous real-world development feedback that filters directly into their consumer products.</p><h3>Complete Pump System Solutions</h3><p>Solas understands that peak performance comes from the entire propulsion system working in harmony. That&apos;s why the brand also produces <a href="/200345-drive-gearcase-parts-solas-5584">drive and gearcase parts</a> and <a href="/20995-engine-water-pump-impeller-solas-5584">engine water pump impellers</a> engineered to integrate seamlessly with their broader propulsion components. These supporting parts are held to the same manufacturing and materials standards as Solas&apos; flagship propeller and impeller lines, ensuring durability and consistency throughout the drivetrain.</p><h3>Why Boaters Choose Solas</h3><ul style="list-style:disc"><li>Decades of dedicated marine propulsion engineering since 1986</li><li>Stainless steel and aluminum options for outboard, stern drive, PWC, and jet boat applications</li><li>Advanced casting techniques and extensive pre-production testing protocols</li><li>Extensive fitment coverage for leading engine and watercraft brands</li><li>Proven performance validated by professional PWC racing champions worldwide</li></ul>