Recently purchased 1990 Maxum 21' BR with 5.0LX Mercruiser I/O, Alpha One, Thunderbolt Ignition.
Replaced shift cable, and worked fine with muffs on. First time on the water yesterday, and it would not go back to neutral unless turned off engine from both forward and reverse. Researched this when I got back in, and seems like the shift interrupter switch is bad, so I go out to look at it, and find it's been removed by previous owner. My questions are: was this engine designed with a switch. Where is does the switch wires connect to? and is it better to purchase the #864363A1 Shift Plate Kit, or ok to replace with the original switch if I can find? Thanks in advance.
Replaced shift cable, and worked fine with muffs on. First time on the water yesterday, and it would not go back to neutral unless turned off engine from both forward and reverse. Researched this when I got back in, and seems like the shift interrupter switch is bad, so I go out to look at it, and find it's been removed by previous owner. My questions are: was this engine designed with a switch. Where is does the switch wires connect to? and is it better to purchase the #864363A1 Shift Plate Kit, or ok to replace with the original switch if I can find? Thanks in advance.
Last edited: