Bolt size 1998 sea rayder f16

[brandon t]

The last time I took my boat out for the season I lost both bolts holding on the black part at the back ( sorry not sure what its called) tried searching online to see what size thread the bolts are but cannot find it anywhere, can someone please point me in the right directions? thanks heres a pic of where I mean, the bolts are threaded only half way

 

[tdonoughue]

Don't have one of those, so don't know directly, but a couple of thoughts:
1) Are there any other bolts holding the thingy on? They are likely of the same threading--you can pull one of those and go to the hardware store for a match.
2) Failing that (and assuming you don't have billions of bolts in the garage like some of us), if you have a tap and die set, you can gently use the taps in the holes to see which one goes in and fits properly. Be careful you don't force anything--you will wind up recutting the threads and making a mess. But if you just use 2 fingers with the tap (not attached to the handle), you should be able to measure your holes.