So I'm looking at buying this boat from my friend and his dad had a portable tank hooked up to the motor and ran great then hooked it up to the gas tank of the boat and it won't start if it does it'll go for a second but not long. Boat is nice and I was wondering what could be the problem. He told me the tank had 10 gal or so and it sat for roughly 8 months or longer. And we replaced the plugs, cleaned the carbs, new primer bubble as well. Could the oil settled and clogged the pipe in the tank and restrictling flow maybe?