Well i replaced the starter motor with the Permax 280BB and the clutch is working perfectly.
I also used some silicone grease and did some black marks for visual aid as suggested and the
whole starter system is working very smooth, smoother than before.
I also made a homemade propane-butane gas valve that is working fine so
Sunday i will try to start it up again. That was fast dont you think?
Thank you all for your help and tips.
Chris