Join Date: Jun 2003
Thanked 0 Times in 0 Posts
Rep Power: 0
Shaft Vibration in Forward but not reverse
Thanks for all your replies. I just had the boat hauled for the winter and sure enough the cutlass bearing is quite worn (despite what the surveryor said) to the point that the shaft will make a "clunk" sound when moved. Another interesting point is that the shaft is not centered in the shaft log, it is displaced to port. There is about a 1/4" of space on the starboard side. I assume this amount space is by design, especially since when I rotated the shaft by hand there is a very subtle "wobble" such that the shaft will brush the top of the shaft log causing the top part of the shaft to be clean of bottom paint. I may have a combination of problems here though. One tip of the prop appears to have some imperfections, the cutlass bearing is clearly worn and either the shaft is bent or the engine is out of alignment - or both. Plus there is a serious issue with the starbord rear engine mount. This mount is under the water pump which was allowed to drip causing severe corrosion. I suspect this mount may be the culprit. I haven''t seperated the shaft cupling from the output flange - it''s badly rusted and currently enjoying a soak in penetrating fluid. So I haven''t been able check deflection at that point. Although I''m not sure how reliable that will be considering the boat is not in the water.
Has anyone out there replaced mounts for an A-4 on a C&C 30? The other three are in remarkable condition, it is just this one that is so badly rusted, I''m not sure I will be able to get the adjusting stud out to replace it.
Any suggestions are most welcome!