more fuel problems

[rambler]

boat was running funny for months, ie, it would run fine leaving the dock but if i stopped for a few minutes and tried to get back on plane, it wouldn't get any RPM and would finally bog itself down and die. if i'd sit for ~20 minutes or more, it would crank right up and run like like it was new.

i run through a gamut of tests that my mechanic says to try but no luck. i brought it into the shop and seems that one of my hoses was deteriorated to such a point that it was sending small flakes of hose into the fuel system and fuel pump and clogging it...so new hoses and a cleaning of my fuel pump and fuel system and supposed to all good BUT...

go out today and it was a repeat of everything i went through before...

do i need to do something drastic like drain my fuel?

oh and i've been filling up at a stattion that advertises "no ethanol" in their gas.

any suggestions/recomendations are appreciated,
rambler