Re: Apparently I'm not meant to have a boat...
Sorry for your loss!
This just reinforces my observation that sailboat surveyors are surveying a sailboat and therefore ignore the mechanicals that aren't associated with rigging, steering and hull. Any sailboat that has an auxiliary engine really needs a surveyor to opine on the sailboat and a mechanic to opine on the condition of things mechanical.
Talk to a lawyer. You may have recourse against the seller, a broker or...who knows!