I have an older Nacra I20 and am having a problem with the holes in the mast for the rotator arm becoming slightly elongated. anyone done a repair with this?? I plan to rivet on a stainless steel plate onto the outside of the mast to reinforce this area and keep the holes from elongating more. thoughts??

Also, does anyone know what the bolt is for below the rotator arm?? someone once told me, but my memory is lapsing a bit... Thanks.

I don't have a I20, but one of the guys at our beach does. He had the same problem, and was able to get a retrofit plate (I beleive from Nacra) to fix the problem.

The bolts underneath are just to stop the spanner from drooping.
assuming that you have a carbon mast, fill the holes with epoxy filler [colloidal silica] and redrill. Actually by saying redrill, that would mean undoing the bolts - then they drop into the mast. just fill around the spanner bolts [tape up the threads to keep them clean].

paul

I believe the purpose of the lower bolts is to keep the rotator arm from hitting the boom. So in other words they are just there as a stop.

I've also heard of this problem. You might check with your dealer to see if they have a kit to fix. Otherwise your plan to put some stainless on the mast is a good one.

Mike Hill

I had the same problem with mine. The bolts are attached to a plate on each side to spread the load. It's really a crappy design. The plate from Performance Cat for fixing it is just a bandaid. The whole design should never be used on a carbon mast in the first place without a compression sleeve. I re-located the rotator arm to the base like the F18's and Tornados and had a grommet installed on the trampoline and have never been happier. If you do this, put some 5200 around the bolts and re-tighten them so your mast will stay sealed. Good luck. Lee