I have a You Can Do airplane that’s almost complete. I decided to put another engine in the mount that already has the holes drill. They are overlapping each other that will make the hold much bigger the normal. Is there a fix for this or do I have to by another mount?

Thanks,

a typical nylon mount is about 5$ for a YCD its a cheap replacement part

drilling over sized holes in the nylon mounts weaken them quite a bit save your self the agony of a broken mount and just get a new one

I think Tim is correct...I'd get a new mount

Then if the new mount's firewall hole position differs from the original mount, remove or drill out the existing blind nuts, and epoxy in a "plug" made from a standard wood dowel.

Make sure the plug sits level with the firewall back and front... I normally make the front a bit longer and work the plug into position so it sits flush with the back of the firewall.
Once the epoxy dries I'll use a Dremel sanding wheel to make the front of the plug even with the firewall.... once done you can drill new holes as needed.

The plane came with a GP Adjustable mount. There are 5 different sizes.
http://www3.omnimodels.com/cgi-bin/W...SM&C=GMH&V=GPM
The dimensions are listed in the tech notes. If you buy the same size that came with the plane you will not need to redrill the firewall.

Didn't know that they were so cheap so it make since to just get another on. Thanks to all for your quick responds.