I have two friends. Each have motors that look similar. They seem to both be Tohatsu M3.5A outboards. One is branded Mercury and is pretty new, about 2005. The other is a Nissan older perhaps 1998.
They both had leaking gas tanks which I replaced. They both started and ran, but would not drive...
Matra Murena
You might need to look for a Tohatsu M3.5A. A quick google search yields this:
https://www.tohatsu.co.jp/en/history/tabid/306/Default.aspx
There is One anode (number 13) at the bottom of the motor as show in this drawing:
This parts books can be found at...