---------------------------------------------------------- Yak-List Digest Archive --- Total Messages Posted Sun 08/06/17: 1 ---------------------------------------------------------- Today's Message Index: ---------------------- 1. 12:31 AM - Re: Re: Engine mount rubbers - YAK-50 (Jan Mevis) ________________________________ Message 1 _____________________________________ Time: 12:31:04 AM PST US Subject: Re: Yak-List: Re: Engine mount rubbers - YAK-50 From: Jan Mevis Thanks George, Actually we never had any problems with the original mounts either, not even with an M14R bolted on the plane. Good website! Jan On 05/08/2017, 18:29, "George S. Coy" wrote: > >Hey Guys, I am not sure where the problem is with the good old rubber >mounts. Worked pretty well for the last 60 years or so. >I suspect many or the problems are caused by self-induced. > >First, rubber has a shelf life as well as a use life. If you are >installing >"New" rubber mounts that were produced in 1994, then you will have >problems. > > >Second, the M14P instillation calls for 14 of 506400-05 mounts and 2 of >the 5064000-35 mount. (the -35 parts go behind the magnetos and have a >slightly smaller metal bonded face to prevent interference with the >magnetos). It also calls for a specific washer (50640002) by the mount >face >that must be installed with the curved face to the mount. There is a >second >oblong washer (506400-03) under other end of the mount assembly. > >Third, there is a specific dimension (34.6 mm) between the face of the >motor mount and the top of the -35 washer under the nut end of the >assembly. >The nuts are tightened to a dimension , not a specific torque. Over >tightening and or under tightening will cause problems as well. > >We offer new rubber mounts made within the last year, as wells the proper >washers. These mount sets are priced competitively. > >I am not a big fan of the DRE ( Direct Rectal Extraction) engineering >method, so tend to stick with the original system that has worked well. > >You can find an instillation diagram with all the part numbers on our >website. > > >George Coy >MotorstarNA >714 Airport Rd. >Swanton VT 05488 >802-868-5633 off >802-363-5782 cell >802-868-6632 Fax >george.coy@gmail.com >http://motorstarna.com/ >SKYPE george.coy > > >-----Original Message----- >From: owner-yak-list-server@matronics.com >[mailto:owner-yak-list-server@matronics.com] On Behalf Of JL2A >Sent: Saturday, August 05, 2017 7:42 AM >To: yak-list@matronics.com >Subject: Yak-List: Re: Engine mount rubbers - YAK-50 > > >We have experienced poor longevity from the rubber mounts even in the CJ6. >We installed a set that was made from a type of urethane that is still >soft >enough yet does not perish when constantly soaked in oil. > >Since then we have installed 5-6 sets of the red urethane mounts, the >first >set are still fine, something like 1000 hours and 4-5 years later. > >I'm just waiting on the spec sheet of the material to send to Doug Sapp. A >set made here in Australia is about $300 or thereabouts > > >Read this topic online here: > >http://forums.matronics.com/viewtopic.php?p=471514#471514 > > ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message yak-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Yak-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/yak-list Browse Digests http://www.matronics.com/digest/yak-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.