NeoBC 0 Posted July 25, 2017 Howdy folks, I picked up a Sea & Sea Motormarine III recently, and feel like I should install a new o-ring before using it underwater. The only problem is, everywhere I've checked does not have the o-rings, and they can't order them. What do y'all recommend in this situation? Determine the size of the o-ring and buy a generic one? Share this post Link to post Share on other sites