Thanks to everyone for all the advice! Phil, our boat has been in the water close to a month now. We've not noticed any change in the vibration of the motor over past seasons (not any worse nor better) when we are actively motoring so far. Since you mentioned that the position of the motor on the mounts can affect shaft alignment I'm concerned about doing anything at all. Do you think it'd be safe for us to secure the lower nut (of the upper motor mount bolt) and tighten the upper nut finger tight plus a wrench turn and call it a day for now?
Thanks Phil and Everyone! David On Mon, May 31, 2010 at 3:16 PM, Phil Agur <[email protected]> wrote: > > > David, > > > > The motor mount is a resilient rubber to isolate vibration so it’s not > unexpected to see the vibrating side come loose. The problem when this > occurs is that the position of the top and bottom nut is your shaft > alignment. Now that it is loose there is really no way to know that the > bottom nut hasn’t also moved putting the shaft out of alignment. If you are > on the hard and it’s only the one that is loose then tighten it for now and > re-align the shaft after the hull has been floating for a week or so. > > > > When you re-align and/or tighten be sure to use two wrenches. The resilient > rubber holding the treaded stud is not intended to withstand torque and the > second wrench is used to keep the torque off the rubber. > > > > *Phil Agur* *s/v** Wing > Tip*<http://www.catalina27.org/public_pages/profile270.htm> > C270 LE #184 MMSI 366901790 > > > > *From:* [email protected] [mailto:[email protected]] *On Behalf Of > *David Savlin > *Sent:* Monday, May 31, 2010 11:40 AM > > *To:* [email protected] > *Subject:* Re: [IC27A] motor mounts > > > > > > Sorry, to be clear, I meant the nut on the top bolt was loose. > > > > David > > On Mon, May 31, 2010 at 1:34 PM, David Savlin <[email protected]> wrote: > > > > *[Attachment(s) <#128f002ad8b80a0b_128efa5af38d9bd1_TopText> from David > Savlin included below]* > > Recently I was troubleshooting my shiver-happy fuel gauge and noticed that > the top bolt of one of the motor mounts was completely loose. See attached > pic. the starboard side one was finger-loose too, haven't checked the aft > bolts yet. > > > > Link to a photo is below. In case the attachment doesn't work. > > http://picasaweb.google.com/lh/photo/gi6nkOsOEB9bvo4pII6W6Q?feat=directlink > > > > How tight should these be? I figured they should be somewhat more than > finger tight since the top bolt secures it to the rubber motor mount shock > absorber, the bottom part of the motor mount appears to be quite secure. > > > > I paged through the manual but didn't find anything. Does anyone have > advice? > > > > Thanks! > > > > Happy Sailing, > > David > > Persephone, hull #6480, 1988 > > > > >
