I have a 6hp that has been out of service for a pretty good while. Serial 6602E-E08167. I posted about it awhile ago looking for a fuel pump and I got replies that a Sierra 18-7350 would work on it but I havent been able to find anyone that has it. Is there another that will work? In addition, I ordered the water pump kit for that year and hp and when I pulled it apart, the impellar that is in it is much smaller than the one in the kit. It measures about an 1.5" across and the one it the kit is about 2.75". Do I need a new housing as well? Any help would be very much appreciated.