Two individuals were fishing in a vessel with a cloth top utilizing a propane heater.  The vessel's trolling motor was not operating, therefore the main propulsion was utilized.  The individuals were overcome with carbon monoxide gasses and hit a docked sail boat, later removed their vessel from the water and drove home.  The individuals did not remember the incident or subsequent actions.  One individual received medical attention the following day, placed on oxygen and received carboxyhemogoplbin examination.  Doctors impression: syncope.
Nordman                       