I just torqued Grenadine's keel bolts last week. She's a 30-1, hull #7. Her forward-most bolt is 3/4" diameter with a 1&1/8" nut. The other five are 1" bolts with 1&1/2" nuts. I torqued them to the specs listed here: http://www.cncphotoalbum.com/doityourself/torquebolts/torquebolts.htm - 250 ft/lbs for the forward bolt, 350 ft/lbs for the rest. I did back them off first, but did not lube them. On advice from Dennis and an old salt at West Marine, I backed off then re-torqued one bolt at a time, forward to aft. I found them all to be just a little bit loose - it took two or three times more swings of the wrench to torque them back up to spec as it did to back them off a bit (given the limited wrench swing room in the cabin, we're talking about backing them off maybe a quarter-turn, and tightening them back up maybe a half to three-quarter turn). I do believe doing that may have tightened up Grenadine's tiny "C&C smile" a little bit. A local equipment rental place had a 600 ft/lb torque wrench with about a five-foot handle on it, and a long extension for the sockets (which was necessary).
Cheers, Randy Stafford S/V Grenadine C&C 30-1 #7 Ken Caryl, CO ----- Original Message ----- From: "Ron Ricci via CnC-List" <cnc-list@cnc-list.com> To: "cnc-list" <cnc-list@cnc-list.com> Cc: "Ron Ricci" <ron.ri...@1968.usna.com> Sent: Wednesday, April 26, 2017 6:50:21 AM Subject: Stus-List C&C 37+ Keel Bolt Torqueing & Rust Stains A few months ago, there was a discussion of rust stains and weeps of water appearing on the keel. My first thought had been that water from the bilge leaked around the keel bolts when the boat is on the hard. I had the boatyard do some exploration. They found a void in the keel that apparently filled with water. The void appeared threaded and may have been used to lift the keel. This all can be seen at: https://1drv.ms/f/s!AhpB-lul9d5YpQkMDs5DeOkS73p2 . Continued inspection found that there was no water leaking down from the bilge. While my boat is out of the water with the mast out, I’m going to torque the keel bolts. The C&C website lists torque values for ½” (80 ft-lbs), ¾” (250 ft-lbs) and 1” (350 ft-lbs). The 37+ may have another larger size bolt. I don’t know where these came from but found something similar attributed to an employee of Mars Metal (keel manufacturer?). Can any other owners confirm a few things? 1. What are the torque values that you’ve used? 2. Did you back off the nuts and lubricate? 3. If so, what did you use for lubrication? Regards, Ron Ron Ricci S/V Patriot C&C 37+ Bristol, RI ron.ri...@1968.usna.com _______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
_______________________________________________ This list is supported by the generous donations of our members. If you wish to make a contribution to offset our costs, please go to: https://www.paypal.me/stumurray All Contributions are greatly appreciated!
