Re: Prop is spinning freely
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There is usually not a simple answer to your question.
The most common issues for non-braking are mechanical within the caliper mechanism. Non-braking is usually caused by the following in order of probability:
The most common issue for not releasing is hydraulic in nature.
The quarter that Courtney refers to will usually solve the problem when the bushing is worn, or the brake pad is worn.
It is possible that the Italian-made Caliper you have is no longer made. If so, Amel will supply you with a new model that will work, but not necessarily fit without minor modification.
I believe that you can either leave the prop free spinning or place the transmission in gear to stop the spinning, however, I do not recommend either of those because I have not been able to verify the long-term issues, if any, in doing either.
On Sun, Jan 3, 2021 at 9:37 AM Chris Likins <likinsca@...> wrote:
We have A54 #133. Today when sailing I noticed that the prop was spinning freely(in reverse) each time a wave would pass under us. It’s easy to see that the shaft brake is not engaging when the engine is in neutral or shut down. Referencing Bill Rouses book p.305, it reads that the hydraulic shaft OPENS the calipers when pressurized by the transmission. Currently the shaft is retracted into the piston at all times allowing the calipers to remain open. I understand that the calipers are supposed to spring shut on the disk when transmission pressure is lost on the shaft. I am a bit confused by this as there is no mechanical connection between the hydraulic shaft and the outer caliper. It seems like the calipers should close when the shaft is extended.. So my questions are