Ok, several answers in one reply - firstly well done Obie - neat job. Do let us know how the drive feels after greasing and how long the rubbers last.
I don't think that a silicone spray would be sufficient but I have not tried it so maybe? silicone grease is my choice because it does not attack the rubber and it withstands high temperatures and centrifugal forces.
Morgan/Centa have identified the undersized shaft in the crank case seal and rectified it but no better finish to the surface.
I have recently had a new Centa unit with splines that are almost a good fit on the crankshaft so that is an improvement.
I do not know if there are any other changes on the later cars but none that I have noticed.
I believe that the friction between the scalloped faces of inner / outer rotors and the rubbers is the main problem, causing some shearing action in the rubbers. certainly the silicone grease produces a smoother ride and may prolong the life of the rubbers but no data yet. The coupling manufacturer, Centa, are not allowed to discuss the Morgan application.
I don't know about Centa's other products but they are a well established company with a good reputation. I can not see them making a coupling which could not be repaired quickly, at sea, in bad weather.
Morgan did not just choose the Centa coupling but did considerable work prototyping it - I have seen the prototype. Morgan are also a company with a long and well respected track record and they deserve to be congratulated on producing such a fine vehicle in the M3W. The fact that there are things which the individual wants to improve just highlights its place as an enthusiasts choice and not some mass produced fodder for the lowest common denominator of the motoring world. I hope that everyone sees my work as being supportive of the machines and their owners and not as some attempt to pick holes in what is a splendid piece of work.
