[geo46]

I have a Mantis 2 stroke ,when i prime it petrol is leaking from somewhere , not had chance to look for it.

[jezza]

Hello it could be a few problems the return pipe from the primer to the tank could be split the needle valve in the carburettor could be stuck a split diaphragm in the carb if your brave enough to strip the carb take it to bits and get it sonic cleaned that way it's had a deep clean  jezza

[Aidy]

I find 99 out of hundred one of the pipes has become brittle and leaks, I tend to change mine now every couple of years as it is cheap to replace.
Failing that as Jezza says..