I became quite familiar with the fuel tank, fuel lines, and diesel bug from a couple long deliveries to the NA's years ago. After breaking down in Oyster Bay, City Island and the Hunts Point Trash depot across from LaGuardia airport, we ended up intermittently sailing and pumping fuel from a teakettle while traversing the rushing currents of Hell Gate and commercial traffic of the East River in NYC. I'd take a length of hose and portable fuel tank if I ever went on a long delivery again.
Our boat is a late model #481. There are no baffles in the fuel tank. You may need a hammer and screwdriver to open the inspection plate the first time. After that reseal only hand tight and you won't need one again. I routinely open ours to check the fuel level since the gauge quit years ago.
Be careful not to spill diesel below. It stains the floorboards and it takes ages for the diesel smell to dissipate. Once you pump or scoop the fuel out, you can get your arm in the tank up to your elbow to wipe it out. Leftover fuel can go into someone's oil tank to heat their house this winter or your local recycling center.
Once you have had this problem you will get a Racor filter and never fill up again without using a diesel additive.