fuel tank size

[hugo]

that depends on how far you plan on going!

factory was 40 with a 70 option i beleive, so 10 more would put you at an extra 80lbs full.

i run an old 200 mercury carbed (thirsty) and have only 40 gallon tank, i fish all day no problem.

[jorgeinmiami]

If you have a bigger tank you don't always have to fill it uo but if you have a smaller tank you can't put more than what it holds

Bigger is better

[mrobertson]

on my 89 20 SF i pulled a 70 gallon tank and replaced it with a 50 gallon tank. Moved the tank about 16 - 18 inches forward for self bailing. I'm going to be running a 115 2 stroke so i dont think fuel will be a problem.

I'd say it depends on the application, how much you use the boat, and how far you usually fish. I wouldn't want an 80 gallon tank on a boat that has a 140 4 stroke that i only use once every 2 weeks. That just means ill have fuel sitting all the time....not good.

If you fish every day, have to run 20 miles to fish, and that 150 is a thirsty engine..........80 is not too much.