Tony,
Don't even bother. Throw it away before it kills you. Never use aluminum for
a fuel tank. It is far too reactive. Use polypropylene, it doesn't corrode.
It is stable. It resists vibration. and it doesn't generate static
electricity.
Steve
"Tony Abbott" wrote in message
om...
How does one check for a fuel tank leak? The boat is a 1974 33' Silverton
with an alumimun(?) gas tank under the cabin floor, 250 gallons. It is a
gasoline based boat.

Thanks for any and all responses.