I have a new easy star and a cheap chinese brushless outrunner that is supposedly a perfect replacement for a speed 400 direct drive motor. Problem is I don't see a good way to mount the motor. It is the type with a 4-hole firewall mount. Any pictures that might be of help to me???

Thanks in advance!

I don't have an Easy Star, but here's an idea that might stir up something better.

Looking at pictures, it looks like the motor is friction fit into the pod. You could put a balsa plug in there and mount the motor to the plug (I'd consider gluing a thin piece of ply onto the face of the plug to give something for the screws to hang on to).

This might move the CG back a bit. It would also move where the thrust is being produced. Is it possible to make a shorter plug so that the motor mounts fits a bit inside the pod area? If you cut the shaft and make sure the prop adaptor fits as close to the motor case as possible, you may be able to minimize both of these changes.

Something else: the Easy Star is direct drive, turning a 5" prop. What kind of prop does the outrunner require and will it clear the rear fuse?

Thanks, I had generally thought of the balsa plug idea, but was concerned about CG changes as you mentioned. CG will already shift aft since I will be using lipo instead of NiMH batteries.
The brushless will not fit in the existing hole, I could probably do some carving, but mounting would have to be very rigid to avoid any flexure that would cause the outrunner to drag inside the hole.
The Prop for the brushless is 5.5" dia and will fit OK without modifications.
I saw one picture where the plug idea was used to provide a mount that actually raised the motor above the current housing. That was done mostly for a different brushless to swing a larger prop.

I am new to electrics, and just searching for ideas. Thanks again for the post.

I have an E Star with a geared inrunner brushless motor that weights the same as the Speed 400 stock motor, it is mounted in the same hole, and I have to use the biggest, with the most weight lipo 2200 3 cell, all the way to the nose to get the cg right. You may want to check out the cg before attaching the motor. Good luck

Himeros

You can always get some lead weight stick ons most hobby shops carry them. Or go with heaver NIMH packs.