The 17 gooseneck should be fixed in position.

You are right, if you pin right to the gooseneck the boom could not rotate vertically.

You need the hinge vertex and the connecting bolts etc.

The vertex bolts to the boom pin. The vertex inner "U" then pins to the gooseneck allowing full universal motion.

See page 53 of the 2006-07 parts catalog Lower left corner.

Vertex # 50772031
Bolt # 8040021
Nut # 8050111

Clevis # 8020401
Ring # 20860000


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Matt Miller
Hobie Cat Company