The Cape Dory Board

Thanks Phil, it is good to know that it is not a systemic problem with the CD31. What do you have for an engine, gear reduction and prop pitch? What rpm range do you run? With my old M25 I had the same as Dana, a 2:1 gear reduction with a 13 X 13 prop and had vibration with that as well. Thanks for ...

Skip, I find it interesting that you are the only CD31 owner to respond so far and you have a vibration as well and don't run above 2200 rpm. Do you supose there is something inherernt in the CD31 that is causing the vibration? I also never ran above 2200 rpm with my M25 and did have vibration altho...

Thanks Lee, but wouldn't I also get the vibration in reverse if it was an alignment problem? My plan is to have a longer shaft made up over the winter so the alignment can be done in the water. I am also contimplating having the shaft slightly over sized at the cutlass bearing to take out the .006 c...

I am looking for help in resolving a vibration problem with my CD31. I repowered last winter with a 3 cylinder Beta 25, with a 2:1 gear ratio, new shaft and cutlass bearing. I am getting a vibration or rumble that becomes noticeable around 2,000 rpm and gets increasingly worse as rpm is increased. T...