I have a board that can't seem to hold the mast base in a fixed position. Even if tightened to the limits of my strength it isn't guaranteed to stay where I set it, but it's also a bit random, sometimes staying put despite multiple crashes during a session on the water, sometimes sliding forward to the front of the track after only a couple.
It happens with either of my mast bases, but both bases stay fixed on my other boards.
Someone at the beach suggested that the deck needs regripping, but I don't think so. The area around the mast track is as rough as sandpaper.
I'm wondering if it might be a deck flex issue, so the loss of traction isn't on the deck itself, but between the nut and the track inside the board.
Any suggestions for a way to fix it?

Does board have alot of dome.

Mark _australia said..
Try getting the surface of the t-nut that contacts the track and hit it with a centrepunch a few times. Now its rough.

If that works, there are foil t-nuts that are rough and have a larger surface area.

If it still slips I'd be surprised but at least then you can investigate other causes like it slowly undoing (?) but putting goop on the bolt to stop that might be a big hassle

Are you saying there are nuts that are longer along the mast track to provide more friction? Where do I get one?
That said, I just looked at the nuts on my foil mast. They are larger, but they are a different bolt size

The bolts are fine, about 2mm internal clearance.
1 base is NP, the other is Severne. Both are happy to stay seated in Starboard and Naish boards, but not this JP Magic Ride

You could also try the Chinook two bolt mast base.

The latest base from Severne has neoprene on the disc towards the board, this works much better than the traditional hard plastic disc only.

Mr Milk said..
Are you saying there are nuts that are longer along the mast track to provide more friction? Where do I get one?
That said, I just looked at the nuts on my foil mast. They are larger, but they are a different bolt size

Yes there is and they have grooves across them for more grip ... I'll have to see if M6 or M8 ..... prob the latter

In reality, the cratering caused by a centrepunch would have more bite than the ridges on the t-nuts.