While most spin out is caused by rider error or a poorly rigged sail, you
might try a couple of things.
First, take some #400 grit sand paper and go over the whole fin,
especially the leading edge, and any lovely painted graphics, until
you can't feel any surface irregularity.
If that doesn't help I'd recommend a new fin, get one from a known
name, True Ames, and Curtis, are my current faves, but there are lots of
aftermarket fin makers out there.
Riding on a fin that came with
the board is like riding on the factory tires that came with your Chevy
econocar, they work ok, until you're at the limit. Put a nice set of P8s
on your econo car and it quickly changes the cars manners (it's certainly
harder to spin the car out ;*) )
Some fins compensate nicely for rider error, usually, they are thicker,
more swept, have a lower aspect ration, and are very slow. There are
still a few fins manufactured with slots, which can also compensate for
a lot of unbalanced rigging or rider error, but I've always disliked the
of slotted fins, and I don't recommend them.
For fin position, I tend to like the fins front edge right behind the back
edge of my foot while
in the strap.
If you're trying to ride a sail that's too big for the board, sometimes you
the COE behind the fin, this causes all kinds of strange imbalances, and can
cause you to spin out. You can try to get the COE farther forward in the
by tuning, or you can move the mast track farther forward (which might cause
other problems depending on where the planing flat is on your board).
The real solution though is not to run a sail that is too large for the
One last comment. In overpowered conditions, it's a lot easier to spin out.
>I need some tuning tips:
> I bought this board a while ago, with the original fin.
> I experience too much spinout
> (In my previous board the fin position was static...)
> In this case should I move the fin back or forward?
> And what about the mast position?