Originally Posted by Orion
For tuna runs I add a 28gallon fuel tank to the floor of my dory ahead of the center console. I have a quick connect plumbed to a ball valve which provides switching between the main tank and the tuna tank. I usually run for a short time on the main, then switch to the auxiliary tank. I run it down to about half to 1/4 remaining and switch back to the main. I try to keep enough in each tank to get home just in case a tank gets compromised in some way. One valve for two tanks....easy.
I have a similar set up. Don’t ever forget to switch the valve from the auxiliary tank back to the main tank after you remove the auxiliary tank and then try to launch in big surf. There is likely only enough fuel left in the auxiliary fuel line to warm up the motor. Don’t ask me how I know this.