Tim sez..
"Don I think your 3.0 is EFI. Or throttle body. Not sure. I think carbs are all a thing of the past now. Â*

Is yours raw water cooled or have a separate cooling system?"

I have the TKS version (turn key) and remember the salesman saying the carburetor was a good thing on the 3.0 motor.
It also has seawater cooling. Good on lakes...maybe not so great in salt water.
I flush and rinse down the boat and motor everytime out on salt water.