how to clean out a gas tank ?

renovation · Post by **renovation** » Tue Jul 12, 2011 2:55 pm

this boat I have has a 5 gallon plastic fuel tank and it needs a good flushing. the cost of a new fuel tank is between $75 -$100 .
is there any ideas on how to flush this safely. only guessing but I'm thinking the problem is in the fuel gage -line connector area of the tank .already replaced the line and pump ball and both end connecters with brand new . the gas used in it is a 2cycle gas-oil mix .50/1
thinking of using 2 cans of carb and choke in the empty tank or mineral spirits or even brake clean .
my plan is to clean the tank and then add one in-line clear auto gas filter in the gas line after the tanks clean so no more problems.
not sure it the filter should be before the pump ball and the tank. or after between the pump ball and the motor.

normalicy · Post by **normalicy** » Tue Jul 12, 2011 4:10 pm

Well, I know on motorcycle tanks you throw acetone in & swish it around. But acetone reacts with plastic. For that matter, carb. cleaner & brake cleaner react with plastic too (because they are mostly acetone). However, I've heard of people doing it on plastic tanks with good results. I'd follow it up with a rinse of soap & water & thorough drying. I've also heard that radiator shops can do a good job.

EvilHorace · Post by **EvilHorace** » Tue Jul 12, 2011 6:33 pm

You could also ask a marine dealers service dept or post the question in a boating forum. Google the question?