Width 1-1/4" (31.5mm) . Diameter 2-1/4" (57mm) . 5/8 shaft 12 spline Package Include：1 *12 Blade Spline Drive Impeller；2 * O-ring；4 * Gaskets The exterior of the practical pump replacement impeller is made of high-quality rubber, which is sturdy and durable, not easy to break or deform, and can be used for a long time Replaces: Volvo-Penta 825940, 860203, 3855546, 3858256, 3862281, 21213660, 876243, 3862567, 3856039 , 877400, 3862567 , 875811-2, 3856029, 21951346. Johnson 09-1027B, 09-1027B-1. Sierra 18-3081. Yanmar 129470-42530. GLM 89540 If you are unsure, please provide your engine serial number. Impeller for Johnson and Evinrude outboard motors, compatible with 2-stroke and 4-stroke engines in 40HP, 50HP, 60HP, 70HP ranges, including Johnson 40HP (1995-2006), 50HP (1995-2005), 60HP (1980-2006), 70HP (1980-2001), Evinrude E40, E50, E60, E70. Made of neoprene, impeller measures 57.1mm outer diameter, 25.4mm width, 10 blades, fits water pump housing for cooling system function. Used in fishing boats for lake operation, skiffs for coastal tasks, sport boats for deep sea use, leisure boats for weekend runs, utility vessels for daily maintenance. Installation requires water pump disassembly, aligns with Johnson/Evinrude service specs (e.g., 6 Nm torque). Replaces OEM numbers Johnson 09-1027B-1, Johnson 09-1027B, Johnson 0433831, Johnson 0777801, Johnson 5001593, Evinrude 0433831, Evinrude 0777801, Evinrude 5001593, and aftermarket Sierra 18-3057, GLM 89680, Mallory 9-45208, RecMar REC09-1027B-1. For fishing boats, fits Johnson 50HP (serial 0E138600+) in lake conditions. For skiffs, supports Evinrude E60 (1980+) in coastal use. For sport boats, services Johnson 70HP (pre-2001) in deep sea tasks. For leisure boats, rebuilds E50 pumps for weekend operation. For utility vessels, maintains 40HP engines in daily tasks. Component weighs 0.1 lbs, shipped individually or in kits. Neoprene material resists wear in saltwater, freshwater environments. Cross-references apply to Johnson 2-stroke (1980-2006), 4-stroke (1998-2006) outboards with serial prefixes 0E, 0R, G. Verify fitment with engine serial number prior to installation. Sierra 18-3057 matches OEM specs for 40-70HP range. Used in water pump systems with brass key, rubber seals. Installation kit may require additional gaskets (not included).