Recent content by sm26890

  1. S

    78 Mercury Dead Cylinder

    Hello I have a 78 merc 800. It idles a little rough, and likes to die when I put it in gear. I have pulled the plug wires while it's idling and it seems the #4 cylinder is dead. Has 120 psi compression. When I pull the plug wire off, it has tons of spark. I have checked the resistance on the...
  2. S

    Lower Unit Interchange

    I have a 78 Mercury 800. Can anybody tell me if a lower unit from a 76 85 HP Mercury will interchange?
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