I have a 2008 Mercury 150XL EFI and I can not find out what water pump it takes. My problem is when I start motor I wait a good 30 sec. to over a minute to see water coming out of the pee hole. I had complained about it once under warranty and the dealer put a different one in and then I got water out with in 5 seconds, but after the last check up they replaced it with what the motor had in it before and now I wait. They told me that the motor had a high volume pump and they put in a high pressure, and I am not sure I have that right it could be in resverse of what I said, but what ever it is I want to get the one that starts peeing with in 5 seconds. I use to have a old 1986 Mercury Black Max and it was instant but I do not think that pump would work in this motor.