On Thu, 20 Jul 2006 15:05:29 +0100, Al Deveron wrote:

Advice please... I need to stick a plastic fuel tap into the hole in
the bottom of a plastic 2-stroke fuel tank

Not a hope of gluing it, or of hot welding it.

Your best option is a screwed, flanged connector with a large flange on
each side and a wipe of petrol-proof elastic sealing compound on either
side (Oyltite is probably the best).

Or else replace it with a new tank, from a different engine if needs be.