Re: Steering Bracket
Take F_R's advice. This is not something to fool with. I had a swivel bracket shear at the tilt pin bosses about a month ago. The motor only stayed on the transom because it is old enough not to have a tilt tube, and I have an adapter bracket that is bolted to the transom.
When I hit a submerged object, the bracket sheared and the motor turned to starboard. The boat was about 270 degrees through a 360+ degree spin, before I was able to pull the power off. I barely managed to stay in the boat and get a hand on the throttle.
You might try
www.sea-way.com for a replacement. They are a very large regional warehouse for BRP, and they have a lot of NOS OMC parts. They are also really great people to deal with. I originally bought a NOS replacement brracket from them, but it turned out to be for a 15" shaft motor. As it turned out, they didn't have the one I needed (my motor is a 1972) and they took the first one back. While I paid the return freight, there was no hassle in doing this.
I have no connection to Sea-Way, but have been really impressed with the way they do business, so I strongly recommend them.