Originally Posted by Srah 1953
Not quite sure which is the appropriate forum for this. I have a Jeanneau 409. It has 2 plastic water tanks and a plastic fuel tank. The water tanks have inspection hatches but the fuel one doesn't – a no no in many circles. What would be involved in cutting an opening into the fuel tank? Can it done without getting a lot of crud mixed into the fuel?
All thoughts much appreciated
We had to do that on my boat because there was already crud mixed into the fuel.
We pumped the fuel out and then used a blade saw to cut out a disk. A friend (what a friend!) did all this AND cleaned out the tank by wiping it with pieces of "engine diaper." Meanwhile I took the piece he had cut out to a fabrication shop. They made a steel
plate and a diesel-resistant gasket
to seal the tank again. I had an extra gasket
made "just in case" I have to go through this again some day.
My tank is small -- 18 gal. -- and the price
of having the tank cleaned and the fuel polished, around $300, didn't seem justified for such a small, accessible tank. It ended my fuel problems, so i guess it worked.