Silver Sailor

Hi, Sorry I have been too busy and just saw your message. In the cold Northeast where you only have a few months each year when you can use your boat, 20 hours annual is possible. The average usage of recreational vessels in the USA is 97 hours, so ...? While the Volvo MD11D is a good engine it is 30 years old and parts are difficult. The last Volvo parts I had to get came from family in the Netherlands, so I do not work on the "Green Griefs" anymore. If the boat price is right, it is a good boat IMHO, go for it and replace the engine with a Beta sometime in the future.
Power depends on where you are, where you are going and how fast you want to motor.
Tom