this is a small sail drive based on a honda 2 cyl petrol outboard engine mounted thgrough the bottom of the boat
it is very quiet unit but normally only had hand start
the main problems were the exhaust boxes tend to corode and the impeller is fitted right in the middle of the unit
although OMC did a similar unit nothing else is sold that i know of to replace it
Mariner power in Norfolk are the experts and can still supply parts