I have a 1985 Johnson 115hp on a 1990 Bayliner Capri. I took off from from the dock I could only get 2100 rpm. I took the cowl off played w/ plug wires and switched a red switch on front of carbs on the starboard side.. it was pointing towards the back of boat and I switched it to port side. I bought the motor last year and still is under warranty, but everytime something goes wrong dealer says it fine. So I would like to know what this switch is. The VRO is disconnected if that matters for this question.