Yep, 20 hp is a bit smaller that often fitted to such a boat. However, whether it is TOO small depends on how you anticipate using the engine. 20 bhp will certainly get the boat up to near hull speed
in calm conditions, but will be pretty slow against headwinds or adverse sea conditions. This situation is acceptable to some, and some view it with great alarm
. When you consider that some cruise
successfully without any engine at all, it looks ok. When you hear folks talking about dropping the sails
and motoring whenever things get tough, it indeed sounds inadequate!!
Seems that the PO has managed with it...
If coupled with a good prop I would not myself consider it a deal breaker.
If you are considering this boat as a long distance cruiser, some more info about the batteries would be useful, and the fuel
tankage (not including the jerry cans listed) is pretty slim. If the pix are current
, looks pretty well maintained.
Cheers and good luck with your search.