What happens when the pump is dead heading when the bowl is closed? Maybe Ken's idea for a return line?Jaysen wrote: ↑Fri Aug 12, 2022 11:08 am cross poseted with OQ...
There really is only one spot for the tank. I'd have to go to a standard tank laying in the cockpit floor to make the motor "work as designed". The solution is the same one us old car people have to use when we move to e15 based fuel lines... positive pressure in the system. It's basically the same thing you do with a primer bulb. All the pump will do is ensure there is always pressure to the float (like if you were constantly squeezing the bulb like I have to do to get back on the dock)
pump pulls from tank (neg pressure)
pump pushes to carb (pos pressure)
float closes bowl input (pos pressure)
Bowl feeds jet (neg pressure)
Jet feeds cylinder (neg pressure)
A $30 fuel pump is much closer to the budget than a $4k 4smoke motor. Especially since we are still in the "do we really want to keep this boat" stage with the Boss. I do have a motor in mind but it actually needs a pump by design. At least that's what the tech told me. Granted that's and EFI motor so....
Also, on motor tanks tend to be problematic. Biggest issues are the fuel selectors corroding as well as water getting in them when you refill off the dock (which will happen given that I'm pushing 4k displacement with a larger wind profile). I have seen one persons that replumbed the "external tank" input to fill the on-motor tank via a pump from the in-hull tank. Not sure I'd want to invalidate the warranty on a brand new motor....
The headaches pumping seem bigger than making a tank platform for a one gallon tank.