Just to show fuel is not a problem with the yalta 555.
last year at the tannum hookup i took my 555 fitted
with a 115 4/s yamaha out past herron island and was
approx 100k plus offshore.
At 5000rpm it took me 2 hrs each way on 2 seperate
days and on both days used 120 lts of fuel. This
still left me 30 lts in the tank. I had an extra 40 lts
in 2 jerry cans just in case.
As for the 615 with a bigger motor i would be ordering
it with a bigger fuel tank.
So is fuel a problem, i do not think so.
Graeme