Feature:1. Replacing OEM numbers for reference: 47850893, 478508910, 478508920.2. 6 blades water pump impeller, perfectly fit for Mariner 4stroke 2stroke engines.3. Premium neoprene material, brass hub, tough and durable, which can withstand harsh marine environment.4. Simple installation, no need of complex operations. Direct replace the old water pump impeller.5. Strictly follow the manufacturing standard to make sure excellent performance.Specification:Item Type: Water Pump ImpellerMaterial: Neoprene with Brass HubOEM Part Number: 47-850893 / 47-85089-3 / 47-85089-10 / 47-8508920 / 47-8M0027792 / 47-850891 / 47-85089 / 47-8M0024502.Replaces:Fit for Sierra: 18-3057Fit for GLM: 89640Fit for Mallory: 9-45303 9-45303-10Number of Blades: 6External Impeller Overall Diameter: Approx. 73.15mm/2.9inInternal Shaft Insert Diameter: Approx. 16.03mm/0.6inFitment:Fit for Mariner 4-stroke engines:Fit for 9.9 HP 4-stroke Bigfoot 0G760300 - UpFit for 15 HP 4-stroke Bigfoot 0G590000 - UpFit for 25 HP 4-stroke carb 0G590000 - 1B344298Fit for 30 HP 4-stroke carb.std. 0G760300 - UpFit for 30 HP 4-stroke EFI 0T409000 - 1B226999Fit for 40 HP 4-stroke carb.std. 0G760300 - UpFit for 40 HP 4-stroke EFI std. 0T409000 - 1B226999Fit for 40 HP 4-stroke EFI short shaft 1B227000 - 1B344398Fit for 45 HP 4-stroke Bodensee 0G231123 - 0T178499Fit for 50 HP 4-stroke standard 0G231123 - 0T178499 Fit for Mariner 2-stroke engines:Fit for 18 HP 18XD 5837437 - UpFit for 20 HP 20XD 6443973 - 0T800749Fit for 25 HP 25XD 5705532 - UpFit for 25 HP SeaPro 0B238464 - UpFit for 25 HP 3 Cyl. 0E268781 - UpFit for 30 HP 2 Cyl. (644cc) 0G053314 - 0T598999Fit for 30 JET 0G590000 - UpFit for 40 HP 2 Cyl. (644cc) 0G053314 - UpFit for 40 HP 3 Cyl. 0G531301 - UpFit for 50 HP 3 Cyl. 0G590000 - UpFit for Chrysler/Force Outboard models:Fit for 25hp (1996-98) serial# E127700-E344999Fit for 40/50hp (1995-99) serial# E093700-E369299Fit for 75hp (1999) serial# E345000-up.Package List:1 x Water Pump ImpellerNote:Please double check the part number of your item, matching information is for reference only. If you are unsure of the item, please contact us before buying to avoid unnecessary return, thanks!