Impeller Kit Replaces Volvo Penta 876120 Sierra 18-3287 New Impeller Kit contains impeller and gasket Replaces: Volvo Penta 876120 , 834794 , Sierra 18-3287 Models : 275, 280B, 290A, 290DP, 430A, 430B, 431A, 431B, 432A, 434A , 500B, 501B, BB231A, 570A, 571A, 572A, 740A, 740B, AQ200D, AQ200F, AQ205A, AQ225D, AQ225E, AQ225F, AQ255A, AQ255B, AQ260A, AQ260B, AQ271A, AQ271B, AQ271C, AQ271D, AS280A, AQ290A, AQ311A, AQ311B, BB225A, BB225AV, BB225B, BB225C, BB260A, BB260AV, BB260B, BB260C, BB261A, DP-A, DP-A1, DP-A2, DP-C, DP-C1, DP-D, DP-D1, SP-A, SP-A1, SP-A2, SP-C, SP-C1 Some models have more than one size pump available, this kit fits pumps 826456 , 855722 , 856513 , which has a 3" end cover with 6 bolts. ( The replacement pumps have a 4 bolt end cover)