Outboard size for 23ft sailboat
For small boats, engine power is related to boat displacement. A sailboat outboard should be a small as possible (low engine weight and correct proppellor pitch) The last one is mostly forgotten.
The formula is roughly, 4 hp per 2200lb
Then go to the internet to find a propellor calculator to determine your propellor size.
Petrol engines are mostly lighter than diesel (Tohatsu)
Good luck!!
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