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Picture 2 of 7 from Album Searunner 31 Centerboard
Here's the centerboard pin receiver for minimizing the amount of water that goes in the bilge when changing the centerboard pin with the boat afloat.  It's about 9" of 3/4" pvc extension with an adapter on one end and a cap on the other.  I removed one centerboard gland end cap (3/4" PVC per plans) and quickly swapped in the gizmo. Caulk in the gland kept water flow to a mimimum. Then I removed the other side gland cap and tapped the pin through gently with a drift, replacing the end cap as soon as the pin was recessed. 
When the board is in place, the dowell in the end cap on the receiver tube lets you (in theory) push the pin through without getting any water.  IN practice I had to loosen the tube and push it through with fingers, but I like the idea...
Here's the centerboard pin receiver for minimizing the amount of water that goes in the bilge when changing the centerboard pin with the boat afloat. It's about 9" of 3/4" pvc extension with an adapter on one end and a cap on the other. I removed one centerboard gland end cap (3/4" PVC per plans) and quickly swapped in the gizmo. Caulk in the gland kept water flow to a mimimum. Then I removed the other side gland cap and tapped the pin through gently with a drift, replacing the end cap as soon as the pin was recessed.
When the board is in place, the dowell in the end cap on the receiver tube lets you (in theory) push the pin through without getting any water. IN practice I had to loosen the tube and push it through with fingers, but I like the idea...
Picture Added 17-09-2017 22:22
Added by md7a


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