J
Jerry
Am seriously thinking about installing a R&D Flexible Shaft Coupling on the MD25 engine of my 1984 Catalina 30 to try to eliminate engine vibration at approx. 1100-2000 rpm (if my tach is accurate). New shaft bearing and PSS shaft seal have been installed and engine mounts removed and checked. The shaft alignment has been done (while boat is in the water). After consulting the Catalina Owner archives I don't recall finding much evidence that others have made a similar fix for this problem by installing a flexible coupling.I am wondering how many owners have had any luck solving a vibration problem in this way.