Hello Martin,
It is hard to tell if the unit needs replacing without seeing it. You might want to take the cowl off and check the security of the screws holding the starter mount to the front of the turbine.
You will void your warranty of you do this so it is your choice. Call Max at JetCat in Germany, he is very helpful or if you are in a pinch I encourage you to contact Bob Wilcox directly.
Call him at:
805-226-8700
Email at:
[email protected]
Regards,
Matt