Big-Autoparts Fit for Mercury 3.5HP 3.6HP 4HP Outboard Motor Quicksilver Water Pump Impeller 47-89980/47-68988/18-3054#10302022-IMP1027 1. Warranty: 2 years;No. Blades: 6; Depth /Height/width :14.49mm; Outer /External impeller overall Diameter: 31.75mm; Internal shaft insert /Hub Diameter : 11.15mm; Net Weight: 12g; Material: Impeller(CR), Shaft Sleeve (Brass). 2. This aftermarket Impeller replace Mercury P/N: 47-89980 / 47-68988, marine 18-3054.OEM part for references only . 3. Replace Mercury 3.5HP 3.6HP 4HP Outboard Motor Quicksilver Water Pump Impeller 47-89980 /47-68988/18-3054. 4. They are similar in design to stock OEM units and require only simple hand tools for installation. 5. OE level quality and durability.100% compatible with OE parts.TS16949 certified manufacturer.