This is a little tough to do in the water, unless you can really see that your shaft is absolutely centered in the shaft log. I did this at least two times, and I located the shaft from the outside with wedges so it was dead centered in the log. Then you adjust your engine with wedges so it is perfectly mated where you bolt the flanges together.(with feeler gauges) Then, with the motor mounts attached to your engine, you can see where your base has to be. In my case the last time, all this amounted to was welding some 3/8" X 2" aluminum plates onto the heavy Aluminum angles that were there, as the new engine mounts were narrower and higher. It seems complicated before you do it, but when you have your engine sitting where it needs to be, you can usually decide what you have to do to make the engine mount adapt to it. I will send you some pix.
Bill Coleman C&C 39 -----Original Message----- From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Curtis Sent: Tuesday, July 30, 2013 8:39 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Is it time to replace motor mounts? I'm in the process of replacing my 32 year old 2GM yanmar with the newer "used" 2GM 20F. The engines have the same foot print, "so I'm told" my old engine mounts are the aluminum type, kind of round with a rubber core. The newer engine has a bonded rubber center with a steal top separated with rubber and a steal bottom. The later ones seam the best mounts. The ones in the boat work but there old? My question is how hard will it be to realign the engine if I go to a complete new mount? The mounts in the boat could receive the new engine with very little if any adjustment to the mount heights? I have never aligned an engine in a boat? I am doing the engine swap with the boat in the water not on the hard. Check out the link and you can see a photo of both mounts. Any advise I will thank you in advance. I want to do it right. http://www.sailnet.com/forums/diesel-engine-forum/101423-engine-swap-will-wo rk-2.html#post1064563 On 7/29/13, Andrew Burton <a.burton.sai...@gmail.com> wrote: > I'm in the same boat( so to speak) and have arrived at the same conclusion: > replace the engine mounts. > Andy > C&C 40 > Peregrine (currently sailing at 6.8 with the kite up and the breeze just aft > of the beam and Provincetown 12 miles ahead) > > Andrew Burton > 61 W Narragansett > Newport, RI > USA 02840 > > http://sites.google.com/site/andrewburtonyachtservices/ > +401 965-5260 > > On Jul 29, 2013, at 12:46, TOM VINCENT <tvince...@msn.com> wrote: > >> The vibration of the Yanmar 30 is annoying and I am thinking of having >> the motor mounts replaced. Is there any way to determine if the motor >> mounts are causing the vibration? >> >> Tom Vincent >> Frolic II 36' cb >> Chesapeake City, MD >> _______________________________________________ >> This List is provided by the C&C Photo Album >> http://www.cncphotoalbum.com >> CnC-List@cnc-list.com > -- "The pessimist complains about the wind; the optimist expects it to change; the realist adjusts the sails." _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com _______________________________________________ This List is provided by the C&C Photo Album http://www.cncphotoalbum.com CnC-List@cnc-list.com
