Modified LT30

Here is the tank and squeeze-bulb.
I believe it is an outboard motor (Mercruiser) tank adapted for the modified WoodMizer.
Sorry for the poor-quality pictures.

Picture of Fuel Tank
Tank and primer

This is the fuel filter. Replaced just a few gallons ago.
What is that about six inches above the filter? Is this the fuel pump???
How does it work?

Picture of Fuel Pump
Fuel Filter plus Pump???

Here is a Picture of Carb