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  1. I

    Mariner Key Switch 54211 vs MP41000

    I was informed that the MP41000 and the OEM 54211 are compatible. I am trying to track down an electrical problem and am running into this wall. - The original key switch (54211 or 54211T) has five terminals labeled F, D, A, E, B (See pic) - The New key switch (Sierra MP41000) has M, B, M, I...
  2. I

    1979 80HP Mariner - won't shut off. Electrical quandary

    Thanks @timguy. I was hoping it made some sense. First time owning a Mariner/Merc and these are a bit different from my J-Rudes in the past. Mechanically simpler... I think :-) Definitely glad I found this forum. I have a feeling I'll find my way back here often enough. I can turn...
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    1979 80HP Mariner - won't shut off. Electrical quandary

    I have a '79 Mariner 80HP SR# 5385386038. I used the Mariner 800 parts manual for all part numbers that I replaced. No cheap Chinese parts, either. I replaced the internal wiring harness (414-3369) and it was a perfect match for the original harness that was all rotten. (See pics of the two) I...
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