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  1. M

    73 850 mercury

    I have a 73 Mercury 850. It runs but the lower unit is bad. I found out that the lower unit can be interchanged with different years and horse powers. (up to 86 and up to 90hp) Are there any parts in the powerhead that I can interchange with simular models. Parts are getting scarce.
  2. M

    73 merc 850

    Is there a date range and horse power range of interchangeable powerhead parts? (Starter, Carburators, etc.) For my 73 Mercury 850
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