Some fuel tanks *do* have a screen over the pickup and some do not. Also, depending on your boat, you may or may not have an anti-siphon valve located where the fuel line connects to the tank. The anti-siphon valve is very small and looks pretty much any other hose barb, but inside would have a spring-loaded check ball. In addition to a clogged pickup screen, anti-siphon valves can also cause fuel delivery problems by sticking or becoming clogged with debris.
I have never heard or seen any boat with a fuel pump of any kind inside the tank.
Ken
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