dump some bio-bor in the tank and make sure you have more than a few filters on board.
also, never ever take the screen
off the fuel intake! remove the fuel line and blow in it. you should be able to do that with out to much strain. if its impossible to do you've got a clog and your itti bitty lift
pump is working way to hard.
FIX: remove strainer and clean and replace. get a electric pump
and hook it up to filter and bang hose around bottom of tank -return goes back in fill.
I like to have two racors and a pump and valve asembly so i can by pass a filter or clean out tank without hassel