Originally Posted by Bodge
Thanks for the great info and the part number.
The "rubber" piece on my GR MK2 is quite noticeable, the one on the C5 is almost nonexistent. I have not disassembled anything yet as I am away working and need to drag the boat home when done here. Is it possible that the C5 may not have one?
The engineer behind the boat may have decided to omit it as a cost savings to keep the product price lower.
If you are using the boat with a moderate size older 2-stroke, you probably have nothing to fear.
The piece serves to reduce the forces on the transom-to-tube material connection. By reducing the angle to a slow progression, it maximizes the the gluing strength so the glue is only tensioned at its "strongest" positions. Glue is weak from a "peeling" motion, but is strongest when present with forces that pull directly "upward" from the base substrate.
By having a sharp angle, there is a possibility of it peeling from the center then outward.
Of course, by upgrading to CSM/Neo fabric, you may eliminate this possibility.
If there is no "rubber" piece, I would simply use some heavy duty black fabric. You should be able to source from black Pennel & Flipo Orca 866 or similar? It has a heavier polyester base fabric to it.
When you are templating the old cuts, I would extend them outwards an additional 1-2" or so...more gluing overlap can only help. Also, be sure to pay attention to the crosshatching bias of the fabric (if you look close, you can see a "#" shaped weave). It stretches easier with an angle against the "grain" of the weave. If you try to stretch against the weave, it will not stretch.