Exactly. Mine failed after I had used the boom 50 times. A friend of mine
used to work at Sailboard Vacations, one of his jobs was to change those
twist locks. The "teeth" that go into the groove in the tail piece wear
off. You can fix it temporarily by wrapping duct tape around the piece that
is at the end of the boom arm so that the collar squeezes the "teeth"
tighter/deeper into the groove. It is very quick to replace them once you
have done it once. Cut the piece that is attached to the boom arm
longitudinally (hack saw or something), peel it off in one piece like
peeling an apple (with***driver for example), sand, mix and spread the
Kalex Urethane that comes with the replacement and push the new piece in.
The urethane expands when it dries up. Wipe it off from inside the arm
>This happened on all of my Fiberspar booms. It is the Twistlock piece on the end
>of the boom arm that is slipping. They can be easily replaced. Call your
>dealer. I think the cost is about $30 for a new pair. You carefullly cut off the
>old one and glue on the new one. It is that simple.
>The replacement pair is better-- it should not slip.
>> Hi there, I have an all carbon NP(by fiberspar) boom from '88. On a starboard
>> reach, the tail piece acts as if it is stripped & slips from an extension of
>> 18cm to 14cm. This doesn't happen on the other side therefore creating a
>> unbalanced rig-SUCKS.
>> The boom has only been thru 1.5 seasons, and structurely it is in good shape..
>> Anyone have this problem early in the life of this expensive boom. Is it a
>> problem with the locking device on the boom arm itself. Anyone with any help
>> or suggestion, please advise. Thanks, George