"RB" wrote in message
...
What is a good GPH fuel consumption number for my 4 cyl 115hp Johnson o/b
for sizing a fuel/water separator? I have a choice of either 30 or 60. I
think the 30 should be more than adequate, but not certain. The good
news
is they're only $5 apart in price, so I'll probably get the big one just
to
have it if I ever need to put it on a bigger engine.



The 30GPH filter is more than enough.
Your 115 probably doesn't consume more than 15GPH at full throttle.