Abstract: A hydronic catalyst device produces hydrogen as a positive catalyst for an internal combustion engine. The hydronic catalyst device employs an electrolysis unit and a current source. The electrolysis unit includes a water container includes a hydrogen/oxygen separator for defining an oxygen chamber and a hydrogen chamber within the water container, a hydrogen outlet for connecting the hydrogen chamber to the internal combustion engine and an oxygen vent for venting the oxygen chamber to atmosphere. The electrolysis unit further includes a water electrolysis conductor within the water container to electrolysis any water in response to a flow of current through the water electrolysis conductor.