transom clamps removal ??

[Commando C2]

i am trying to remove the transom clamps from my 40hp mariner 1998 model.
i have undone the cups that spread out the pressure from tightening onto the transom and thought i could just unscrew the clamps straight out but when the bottom of the thread gets into the transom it gets tight and stops?

not sure how to get them out without putting more pressure undoing them but it feels like it will damage the threads??
any ideas?


thanks

[Erin]

I would check the threads carefully. It wouldn't suprise me to find that they have been purposely burred in the factory so that they can't be undone to far which would damage or force off the 'cup'.

[Commando C2]

thanks erin

the thread ends dont quite look like a normal bolt where the first thread starts.
anyway i can file the thread so it comes undone?