The picture below shows the collar(check arrow point) that I am talking about, it should have pin through the shaft and when you turn it, it adjust the tension on the spring.
The correct adjustment on the clutch is usually about 1/2" (picture shown below) of play before it starts to disengage (play at top of the handle).
Regards,
Bruce
Please do not PM me asking for support. Post on the forums as it helps all members not just the individual.