Water pump - What kit for a 1988 40 hp Mariner (Yamaha?)

[kmtroupe]

I have a 1988 Bass Tracker with a 40hp Mariner. I think this is one of the Yamaha/Mariners based on the fuel pump. I cannot seem to locate what impeller kit I need to repair the water pump. The serial number keeps coming up as "not found". Anybody able to help me find out what motor this is? The motor cover says it is oil injected but it does not have a tank (I mix gas and oil)...so, that throws things in a search as well.

Here is the info on the motor:

40ELTO 6E9 L 501611

Any input??