I have a 2007 XLV with the Indmar 340 5.7L ETX/CAT engine. I have not been able to find any information on the impeller. I have been through both the Moomba and Indmar manual but they do not I.D. the impeller by a part number or model number. I think its a Johnson Pump with either the 09-1028B or 09-1027B impeller but it would sure be nice to know before I open up the pump. Thanks Richard