Oh cool, I forgot the FC470 had installed intercommunicating valves. If that's the case don't you just twist the outer ring to "fill" and pump them all at the same time? The valve adapters are only ~$12. I just used a PVC cap to block off the hose opening for my adapter, drilled a hole in it and expoxied in a BC nipple. Cost me <$5.
Originally Posted by prairie tuber
Interesting. I was going to ask why so little fuel if planning to travel to go to remote locations. I typically carry 4-5 x 5 gallon tanks on my trips which gives me a range of 100-125 miles (~ 5 mpg). That is with a 40 hp 2 stroke ran at WOT for 80-90% of the time which is considerably less fuel efficient a 60 hp 4 stroke would be.
Well WOT on a 2 stroke is not going to be very efficient... I almost never run mine WOT. My max loaded RPM is around 5300 RPM (6000 without scuba gear). So I normally cruise at 4300 which is about 20 knots. On a typical dive day I use between 2 and 4 gallons of fuel. I have a second 6 gallon tank I could use, but I've never needed it. Its heavy and takes up alot of floor space which is already in short supply with dive gear for 2 to 4 people aboard a 15.5' RIB.
The OP is in Oregon. When/if he decides to visit the north BC coast I'm sure he can add jerry cans or a second fuel tank. But day-to-day there's no way he's getting even 50 miles away from a fill-up.