I brought 1937 johnson model 110 back to life a couple of years back. I believe it is 1.7hp. I used a Mercury float to replace the cork float and it worked great. Sierra P/N 18-7208. It is a foam float so it is ethanol resistant. Slight modification and it was good to go.

Year is a youtube video of it running.

https://m.youtube.com/watch?v=0kBRf4oopPk

Cheers,

Cajun