Sure no problem. I posted all the details on the construction of the motor mount and motor in the Hobie thread The ultimate tandem island (viewtopic.php?f=69&t=33720
Here is a pic of the motor mount with 100ft of anchor line spooled onto it ( the anchor spool is a recent addition, (just a handy place to spool up the anchor line (up to 150ft of 3/8 nylon rope)).
here is a close up of the motor mounted to the mount
I bought the motor at a place in St Petersburg, Fl called Island hopper outboards. Here is the link (http://www.smalloutboardengines.com/20h ... flage.html
I have ran that motor on My TI's, an Oasis, and a Revo, with the standard 4 1/2 inch pitch propeller the motor propels all three boats to around 4mph (a factor of the prop pitch (not the size of the boat)). The motor takes the same prop as the Merc 2 1/2 horse and Tohatsu so I put on a 7 inch pitch prop on the motor to try and get more speed on the TI. Unfortunately because it's a large boat, the 7 inch pitch prop can't get to full RPM (horsepower limited) so the best I typically get is around 5mph (The Revo really scoots up to around 8mph). I also have it rigged to run off of those small camper propane bottles (extra hoses and valves). Basically you start the motor on gas then turn on the propane and shut the gas off (pretty simple). I get maybe an hour or two run time per bottle. I have the short shaft version. the motor in this mount is actually a little too shallow in the water, you can hear the prop sucking air once in a while on the video (from being too shallow), but this is more because the motor is off to the side of the hull and when the boat tips (from sailing), it pull the motor up just enough to start skipping, tacking the other side, and straight ahead it's fine.
The motor mount slides into the rod holders, It is 1 1/2 inch PVC tubing. I then took two 3/8 dia steel rods ( 1/2" alumininum would have worked better), and drilled two holes into the end of a pressure treated 2x4, then glued the rods in with marine epoxy. I roughed the rods up and filed a few notches into them so they don't come out of the wood. I then matched the angle of the motor mount with the desired angle of the motor (so the shaft points straight down while using the motor). You know you have it right when the motor mound board is close to vertical when installed. (Note: The rod holders are tilted both back and outward so you have to compensate for this when you drill your holes in the board). I then just drilled holes through the PVC tubing to get the rods throught it. I put a radiator hose clamp on the far tube to hold everything together. I then just filled the tubes with Bondo boddy putty in and around where the rods went thru the tubes (not the entire tube). This holds everything all together and very strong. I then put on a PVC frame that loops up and over, and have a clip on top to guide the sail control line so it stays on top of the bracket while sailing. This also give the rear passenger some clearance for their head from the sail control lines. The bend in the sail control lines doesn't seem to affect the performance of the sail too much.
On one of my older hulls I sprayed insulation foam around the rod holders to kind of give them more strength, on this latest 2012 TI I didn't bother, the tubes seem to be holding up fine.
When running the motor it develops a lot of torque (from the prop driving forward) I took a small length of spectra (rudder line) cord and ran from just below the motor mound (tied around the shaft), then clipped with a clip to the (now unused) bungy connector near the back of the boat (just behind the motor). This stops the motor from rocking forward and backward while throttling up or down, and keeps the rotational stess down on the motor mount and rod holders.
I also have a safety line so if the motor ever falls off in the water you can retrieve it. (I have lost several motors that way).
As I have mentioned I'm not as happy with this motor as I would like, I should have spent a little more and got the Honda motor. It all works ok and all, and I have quite a few miles on it over the last 2-3 yrs, but it is not really designed for salt water, or reliability like a Honda or Merc would be. This is the one I should have got ( http://m.marine.honda.com/#/outboards/motor-detail/BF2
). The Honda is only a couple hundred more (around $750), and only 7 lbs heavier than the Island hopper, It does only have a 75 deg tilt though, and the motor mount might need to be modified.