I believe this is the motor that the Investigator was designed to use in a well inside the port side cockpit locker.
Seen on facebook, Archimedes Penta 4hp air cooled outboard motor for sale, $150, Melbourne:
https://www.facebook.com/marketplace/it ... 174676304/
I've also posted this on TSP and copied the photos there:
https://www.trailersailerplace.com.au/p ... 37#p213337
Archimedes Penta 4hp air cooled outboard motor
Archimedes Penta 4hp air cooled outboard motor
Potential convert to Investigating.