Feature 1Fits Yamaha 40 50hp 2-stroke outboard motors 1984-1994 2This water pump kit replaces OE# is 6H4-W0078-00-00 3Comes with complete impeller, wear plate, insert cup, gaskets, mounting bolts etc. Easy and convenient to use 4Made of metal and plastic, it is durable and lightweight 5These impellers are developed for top performance, which is weatherproof, and it is in good condition even in salt water. Come and try Specification Features: Fits Yamaha 40 50 HP 2-stroke outboard motors 1984-1994. This water pump kit replaces OE# is 6H4-W0078-00-00. Comes with complete impeller, wear plate, insert cup, gaskets, mounting bolts etc. Easy and convenient to use. Made of metal and plastic, it is durable and lightweight. These impellers are developed for top performance, which is weatherproof, and it is in good condition even in salt water. Come and try it. Specifications: Material: Metal, Plastic Color: As the picture shows Cross reference number: 18-3429 Replaces part: 6H4-W0078-00-00 Impeller Size: 5.7 x 1.9cm/2.2\" x 0.7\" Water Pipe Adapter Size: 1.1 x 1.3cm/0.4\" x 0.5\" Insert Cup Size: 4.8 x 2cm/1.8\" x 0.8\" Wear Plate Size: 7.7 x 8cm/3\" x 3.1\" Bolts Length: 5cm/1.9\", 6cm/2.3\" Package Weight: approx. 210g Fitment: For Yamaha 40 HP 2-Stroke 1984-1994 For Yamaha 50 HP 2-Stroke 1984-1994 For Yamaha 50 HP 2-Stroke (Pro Series 50) 1987-1993 Package Includes: 1 x Water Pump Impeller 1 x Impeller Wedge 1 x Housing Insert Cup 1 x Impeller Wear Plate 3 x Gaskets 4 x Bolts with Washers 1 x Water Pipe Adapter Note: Please compare all specifications and pictures before purchasing, to ensure this is the correct part for your model!