Centerboard Sabre Owners: Sheave Box Inspections

By Rich

I had a new owner reach out to me with the following question regarding inspection of the centerboard pendant sheave boxes on his Sabre 42:

Is it possible to check condition of sheave box pendants with the boat in the water?

I thought it might be helpful to post my answer here, and also to post a link to my prior article on the vulnerability these sheave boxes pose and why they should be carefully inspected. Here is my answer to the new Sabre 42 owner in case it might be helpful to others:

All of the sheave boxes can be examined while you are in the water.  You’re looking for corrosion at the welds in these boxes and any signs that pin hole leaks have developed. But far more vital will be the very short lengths of coupler hoses that connect each box to the metal conduit through which the cable travels – look for signs of cracking or delamination (which you can usually see at the edge of the hose). Be sure the hose clamps are secure and not corroded. My hoses and clamps were in very poor condition. The first sheave box is under the engine – be careful to degrease it so you get a good look. There’s another one under the cabin sole in the aft head, and of course the one in the lazarette under the winch itself. Unless you have documentation that the coupler hoses and clamps have been replaced, on your next haul out I would recommend you replace them all as a precaution.

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