Originally Posted by willk
He's just pulled an outdrive out of it - maybe he wants to bolt into original transom with a safety margin??
Yup, you hit it spot on. We were recommended to do some reinforcement of some kind by zodiac and a few other "experts" as they transom of this particular build wasn't designed to handle the load of an outboard (the inboard would have transferred the load directly down to the stringers). Also, we were looking to not have the armstrong bracket directly put force onto the repair job, as is the bottom of the bracket lined up perfectly with the seem of the plug, the plate will disperse this load to the old transom (in theory).
We have a friend who was able to source us the plates pretty cheap so it was an easy decision. We have also thought of having some sort of strut from the inside plate down to the stringers (at the same attachment point as the inboard), but given the "beefyness" of the transom, we feel okay with it (but might change our minds).
Any input would be appreciated, we are no experts by any means, just two avid sailors who are very very comfortable with fiberglass, gelcoat, boats, etc. We are re-attaching the tubes today, splashing tonight or tomorrow for some light "sea" trails (okay, flat water lake trials). Lots of little things left to do, like hook up "extra" electronics (bilge pump, nav lights, etc etc), but we want to see how she floats at this point.