Question: What side of the boat do you mount a transducer?
Answer: A transducer should be mounted on the side of the boat with the downstroke of the outboard propeller, which is usually on the starboard side. An easy way to check this for your boat is to observe the direction of rotation of your propeller. If it’s clockwise, then your transducer should be on the starboard side, but if it’s anti-clockwise, then the transducer should be on the port side.
The side of the transom with the downward stroke of the prop has less turbulence than the side with the upward stroke, which is why it is the best transducer mounting location.