"I have a 2002 25hp mercury outboard, serial number ot434558. The switch box(sn 855713-A2) needs to be replaced. The part was supposed to only been made for two years. When I search for info on the motor online, I only find serial numbers 855713-A3 or 855713-A4 for the switch box. The A3 is commercial and the A4 is non commercial. I heard that the A2 was superseded by the A4 and was really hoping to confirm that before I purchase the A4. Any info would be greatly appreciated!
Thank you!"
Thank you!"
