Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
David, I replaced those machine screws years ago but I didn't record the length. I want to say they are between 2 1/2" and 3" long and 1/4" diameter. I would drill holes then try some cheap screws of different length to find the right size. Then order some good SS fasteners from somewhere likehttp://www.boltdepot.com/ Order extra of whatever you get to add to your parts bag. There is a cavity between the interior liner and the cabin top you may want to fill with thickened epoxy before bolting down the winch. Good luck,Craig.
It was frustrating because the deck has one angle, and the liner is another angle so the bolt length varies from the middle of the boat going out. I think I just went with 2 1/2 in bolts and then cut them off with a dremmel tool. Using a wide washer, lock washer, nuts, and then acorn nuts.
My deck and liner width where I cut out the solar vent is:
3/4 inch on one side 7/8 inch on the wide side.
I determined that in the future if I had to do the job again ( especially working alone ) that the longer bolt worked well in that I could grab the end with a pair of small locking pliers and this would allow me to hold the bolt as I tightened the nut, then cut off the end before adding the acorn nut.
Sorry... I did not measure the deck width at the winches.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.