Globe Marine DriveSaver Model 424Y Marine Drive Coupling for Yanmar & Kanzaki Transmissions

I hv a similar R&D made plastic shaft coupling. But I notice the tightening of the screws and misalignment before tightening the screws can caused the shaft to go out of alignment. Up to about 0.5mm. Maybe it is because it is made of plastic. Such misalignment can cause the shaft to vibrate. I had to knock the dics into alignment using a gauge before tightening the screws.I wonder if this Global design have a similar problem. The plastic seems thicker and not so easily warped. If it is better I will consider changing mine.Also notice the mating face is a cone and cup for self alignment, so make sure it is the correct way round.19-5-2015 just received the item. I read the manual and it seem that knocking the shaft to minimize run out is needed. That means you have to loosen the screws and knock the shaft with a mallet. The shaft runout, I.e. concentricity alignment, can be measured using a runout gauge. Can get one from ebay. The one I got from west marine is less rugged and also no manual. So vibration caused by runout is normal.

Great quality. Build is very solid. Installed on a Yanmar 2QM15. Needs atleast 1.2" of clearance between transmission flange and prop shaft.