Ensure optimal cooling performance for your Yamaha 40 and 50hp 2-stroke outboard engines with this premium Water Pump Impeller Kit, designed specifically for models from 1984 to 1994. This comprehensive kit replaces the original equipment part number 6H4-W0078-00-00 and includes all essential components for a hassle-free installation, providing reliable and efficient water circulation to protect your engine from overheating. Key Features: · Perfect Fit for Yamaha 40 and 50hp 2-Stroke Outboard Engines: Compatible with Yamaha 40hp and 50hp 2-stroke models manufactured between 1984 and 1994, including the Pro Series 50 (1987-1993). · Complete Water Pump Kit: Contains a high-quality impeller, wear plate, housing insert cup, gaskets, impeller key, water tube adapter, and bolts with washers, ensuring a convenient, all-in-one replacement solution. · Durable Construction: Made from premium metal and plastic materials, this water pump kit offers excellent durability and lightweight design for long-lasting performance in various marine environments. · Weatherproof and Saltwater Resistant: Engineered to withstand harsh conditions, the impeller maintains its integrity and functionality even in saltwater applications, delivering top performance and reliability. · Easy Installation: All necessary components are included for a straightforward and efficient replacement process, saving time and effort during maintenance. Specifications: · Material: Metal and Plastic · Color: As Shown in Pictures · Cross Reference Number: 18-3429 · Replaces Part Number: 6H4-W0078-00-00 · Impeller Size: 5.7 x 1.9 cm (2.2" x 0.7") · Water Tube Adapter Size: 1.1 x 1.3 cm (0.4" x 0.5") · Insert Cup Size: 4.8 x 2 cm (1.8" x 0.8") · Wear Plate Size: 7.7 x 8 cm (3" x 3.1") · Bolts Length: 5 cm (1.9") and 6 cm (2.3") · Package Weight: Approx. 210g Package Includes: · 1 x Water Pump Impeller · 1 x Impeller Key · 1 x Housing Insert Cup · 1 x Impeller Wear Plate · 3 x Gaskets · 4 x Bolts with Washers · 1 x Water Tube Adapter This water pump impeller kit is an essential replacement part to maintain the efficient cooling system of your Yamaha 40 and 50hp 2-stroke outboard engines. Its robust design and complete component set ensure reliable operation and extended engine life, making it a smart investment for boat owners seeking dependable marine engine maintenance.