Hi

I just got given a small outboard with integral fuel tank. It hasn't
been running in a long time but is not siezed up or anything so I
thought I'd see if I can get it running.

It's gummed up inside the metal tank and there is some rust inside too.

I've removed the little tank and pet cock. Now I need to get it cleaned
out so that it doesn't release deposits into the carberator.

Any suggestions as to what chemicals can be sloshed around in there to
removed the varnish?

What about the surface rust inside?

Thanks folks.