Boat manuals generally have information on boat construction, commissioning, operation, maintenance, running and standing rigging, plumbing, electrical with associated diagrams BUT do not have documentation on sails, engine, electronics, and equipment (head, refrigeration, valves, batteries, bilge pump(s), etc.). Recommend buying the manual for reference and making a list of your boat equipment with manufacturer, model, serial number (if possible) and download their manuals. Below is a link to the owner's manual for an O'Day 34. Hope that helps.