Globe Marine Run-Dry&reg; Impeller Model 125 for Jabsco 836-0001, Johnson 08-1029B-1, Sierra 18-3078, CEF 500105 & Volvo 807904 Made with Run-Dry-- Guaranteed to Run-Dry for Up to 15 Minutes. 3-3/4" Diameter x 2-1/2" Wide, 1" shaft diameter, 12 Pt. Spline Drive, 9 Blades Replaces Jabsco 836-0001,cJohnson 08-1029B, Oberdorfer C7054, Cummins 21601R, Volvo 21430184, 875736, 875660, 876602 Don't get stranded out on the water -- order a spare impeller too. Made in the USA. For water applicatons only. Impeller only- does not include gaskets or O-rings.