As funny as it sounds... I've done this before on an offload car. Now it wasn't exposed to marine elements but it will work I'm sure since its a marine product.

Full the holes with marine Tex and put in the hardware again. Make sure you clamp it so that it is tight to your bracketing. Worked awesome for me and is still holding on tight on my Sandrail.

Your other option is going up a size with the hardware if you really don't want to put new holes. Filling the holes with any kind of wood glue or other more common wood filler won't hold up in a constantly wet environment.

I'm sure you'll get plenty of other suggestions... one will likely be better than mine. But it worked for me and it's an option.

My Teak swim step or something like that, came off the back of the boat on fathers day at elsinor. Lucky i was able to recover it. It seems the screws are striped. How to repair it with out drilling into. any ideas.

Did the brackets detach from the transom or the step come lose from the bracket?  Teak is dense wood.  If the step came lose from the bracket, re-drill to fresh wood and go over size on the stainless wood screws with sealant.  If the brackets came lose from the transom, through bolt with backing plates and use the appropriate size stainless machine screws.

I hope it works out for you.
HD