Folks, I may have mentioned this on here before, but I find that a great source for high quality O-rings is the Caterpillar dealer.  They have a tremendous selection and the quality is top notch.  If you can bring the old one in they always seem happy to find one that will fit.  Often, if I only want one, they will say just take it with you it isn't worth the paperwork. John Deere industrial dealers are also sometimes good, but Caterpillar is my go to source after having bad experiences with those I have gotten at hardware and autoparts stores. Enjoy the winter, but don't put off all your boat issues until the 2 weeks before Spring launch! Gary Hagstrom Crackerjack, a MaineCat P-47 hibernating comfortably in heated storage Iron River, Wisconsin