Cesar Posted October 18, 2018 Share Posted October 18, 2018 Hi to all! Where can I found the Long-EZ manuals? I’m looking for the P/N of the four bolts that attach a lycoming O 290 engine to the mount. Is a conical mount. Regards! Quote Link to comment Share on other sites More sharing options...
Kent Ashton Posted October 18, 2018 Share Posted October 18, 2018 (edited) 1 hour ago, Cesar said: Hi to all! Where can I found the Long-EZ manuals? I’m looking for the P/N of the four bolts that attach a lycoming O 290 engine to the mount. Is a conical mount. Regards! I am not sure the manuals show what you want (the bolts). It would be in Plans Section II but that did not show the engine, only the suggested firewall arrangement and the mount. Here is the engine parts manual https://www.lycoming.com/sites/default/files/O-290-D Parts Catalog PC-102-1_0.pdf but it shows the rubber bushings but not the bolts. They are standard AN 8 (1/2") cad-plated bolts with a drilled shank sold many places but you will need to measure the length. You will need the wide washers shown in the parts manual (a standard washer), castellated nuts and you might need some thick and thin washers and cotter pins. I saw your post on FB. What are you going to do with a kind-of Dynafocal engine mount and an engine that uses conical mounts? I don't see a good way to combine the two. https://www.aircraftspruce.com/catalog/hapages/an8.php Edited October 18, 2018 by Kent Ashton Quote -KentCozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold Link to comment Share on other sites More sharing options...
Cesar Posted October 18, 2018 Author Share Posted October 18, 2018 Don't worry, I'm going to replace the mount for the correct one. Quote Link to comment Share on other sites More sharing options...
Cesar Posted October 18, 2018 Author Share Posted October 18, 2018 hace 17 minutos, Kent Ashton dijo: I have a link for the EZ manual but will have to find it. The engine manual https://www.lycoming.com/sites/default/files/O-290-D Parts Catalog PC-102-1_0.pdf shows the rubber bushings but not the bolts. They are standard AN 8 (1/2") cad-plated bolts with a drilled shank sold many places but you will need to measure the length. You will need the wide washers shown in the parts manual (a standard washer), castellated nuts and you might need some thick and thin washers and cotter pins. I saw your post on FB. What are you going to do with a kind-of Dynafocal engine mount and an engine that uses conical mounts? I don't see a good way to combine the two. https://www.aircraftspruce.com/catalog/hapages/an8.php Don't worry, I'm going to replace the mount for the correct one Quote Link to comment Share on other sites More sharing options...
Kent Ashton Posted October 18, 2018 Share Posted October 18, 2018 Below, a generic conical mount. An EZ will be similar but the bolt length varies. Quote -KentCozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold Link to comment Share on other sites More sharing options...
mquinn6 Posted October 22, 2018 Share Posted October 22, 2018 I am always amazed at the torque on these bolts! 40 INCH-LBS... and the back out the nut to get to the hole for the cotter pin. Good detail, Kent, thank you! Quote Link to comment Share on other sites More sharing options...
Kent Ashton Posted October 22, 2018 Share Posted October 22, 2018 10 hours ago, mquinn6 said: I am always amazed at the torque on these bolts! 40 INCH-LBS... and the back out the nut to get to the hole for the cotter pin. Good detail, Kent, thank you! You're amazed because it's so low, right? Quote -KentCozy IV N13AM-750 hrs, Long-EZ-85 hrs and sold Link to comment Share on other sites More sharing options...
mquinn6 Posted October 23, 2018 Share Posted October 23, 2018 Normally AN8 1/2-20 is 480 - 500 in. lbs. for tension or 290 - 410 in. lbs. I am certain the rubber bushing will smoosh much sooner than the bolt stretches... but, yeah, 40 in. lbs. always seemed low... but I am also surprised how many wings are held on by just 2-3 AN6 bolts (in shear) - but that is 76k psi load... I follow what works (but always question it twice (and verify 3 times)). 1 Quote Link to comment Share on other sites More sharing options...
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