She won't start... can anyone help!!!!!!

[Davebo]

Sorry to hijack, but ...after my Thou had been sitting for a while it coughed and spluttered into life but it ran OK. Only thing was if i cracked the throttle open it would stutter. Steady opening and it was fine. This was in the garage not under load.

Don't remember it doing that before. Any worries ?

Thanks.
DBo.