We have a nasty clatter in a new ZF 25 transmission on new 4 cylinder Beta (Kubota block) engine
Betamarine recommend a Centaflex CF-M 160 coupling

Its specs look good, but I am wondering about its connection to the prop shaft.
It relies on a tapered bushing gripping the shaft, with no key.
Does anyone have any experience with the coupling and/or any coupling gripping the shaft with a taper bush?

http://www.tnorrismarine.co.uk/images/Centaspec..jpg