Evinrude/Johnson Hydrus Propeller Exhaust Ring (5006512)

Improves midrange engine operation and performance on Evinrude E-TEC 40, 50, 60, 75, and 90 HP engines. The Hydrus propeller exhaust ring should be used on gearcases fitted with Hydrus propellers, part numbers 177201, 177202, and 177203. If there are any questions refer to parts and accessories bulletin 2005-01 (P)