Engine bracket on older 912 bed style mount

Did an oil change last weekend, when I started the engine to warm the oil I heard the familiar sound of a brocken engine bracket (912ULS 451 on the hobbs). Pulled the cowling off and sure enough the right engine bracket had cracked completely off AGAIN! by the front engine bolt (3rd time). Changed my oil/filter and pulled the bracket off. I fabricated a new bracket out of 4130 and made a doubler for the frount 2 inches and tig welded it in place, I also fully gusseted the front of the bracket so that it is boxed. It will not break there again, I just hope I did not transfer the problem to somewhere else.
I have seen and heard of this bracket cracking on other Zenith airplanes (exact same failure mode) with the older style engine mount and the 912/912S engines, so it is definitely an area to keep an eye on.

Views: 295

Comment

You need to be a member of Zenith Aircraft Builders and Flyers to add comments!

Join Zenith Aircraft Builders and Flyers

Comment by Bob McDonald on May 1, 2012 at 11:43am

Post some pictures... they say a picture is worth a thousand words, and that makes me a speed reader :>)  I have an older bed style Rotax 912 mount on my CH601HD. Do you have the BullyHawk soft start module and slipper clutch on the gear box?

New from Zenith:

Zenith Planes For Sale 
 

Classified listing for buying or selling your Zenith building or flying related stuff...

                                                     

Weather Maps


Custom Instrument Panels
for your Zenith
:

Custom instrument panels are now available directly from Zenith Aircraft Company exclusively for Zenith builders and owners. Pre-cut panel, power distribution panel, Approach Fast Stack harnesses, Dynon and Garmin avionics, and more.


Custom Upholstery Kits for your Zenith Aircraft:

Zenith Vinyl Upholstery Kits


Zenith Apparel from EAA:


Zenair Floats


Flying On Your Own Wings:
A Complete Guide to Understanding Light Airplane Design, by Chris Heintz


Builder & Pilot Supplies:

How to videos from HomebuiltHELP.com

Developed specifically for Zenith builders (by a builder) these videos on DVD are a great help in building your own kit plane by providing practical hands-on construction information. Visit HomebuiltHelp.com for the latest DVD titles.

 

West Coast USA:

Transition Training:

Wheels & Wings

Pro Builder Assistance


 

Aircraft Spruce & Specialty for all your building and pilot supplies!

© 2019   Created by Zenith.Aero.   Powered by

Badges  |  Report an Issue  |  Terms of Service