How did you guys fix the engine mounting rails on your Phenoms? I'm thinking about casting them up to square with a silica-epoxy mixture or something. Not quite sure yet.

Or did you just leave it like it came, bolted the engine on and hoped for the best? I just can't see the engine staying put in the long term.

What kind of material is in those engine mounts? Are they strong enough for sheet metal screws, so I don't have to drill all the way through?

Hmm... I am hoping for the best, and I drilled all the way through- You might try Russ at Oakdale as far as materials are concerned

Rudeboy, if the mounts aren't true you might try this idea. Put a light coat of heavy grease on the bottom of your engine and mix up a stiff batch of epoxy, [like JB WELD]. Goop the epoxy onto the mount beams and lay the engine down onto the mounts. Once the glue is dry, I would try to run a #6 sheetmetal screw in and cinch it down tight with a hand held driver. If you can't strip the threads with a reasonable amount of man power, they should hold OK against 2 horse power.

CP,

That's the first thing that crossed my mind... but on second thought I'm a bit wary about glueing my engine in Perhaps if I degreased it properly, it would stay put all together

The axle grease idea came from the way a lot of modelers make slop free aileron torque rod bearings.......grease the rods and bury them in puddles of epoxy.

The bottom is hollow under the beams so if you drill through and enlarge the holes on the bottom the nuts will be inside up against the bottom of the rails. I just stuck a piece of trim sheet over the holes to cover them. The engine on mine was still tight when I pulled it off.