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  1. J

    Lower Unit Replacement

    Got a early 1990's (92', I think...) 75 HP Mercury Outboard and the lower unit will need be replaced. Not sure exactly what is broken (lower unit grease leaked out, all of it) but my buddy is now in the market for a replacement lower unit. He's not a tech savy person so I'm helping him out and...
  2. J

    1989 Johnson GT150 Filling Trim/Tilt Reservoir Process

    Good afternoon, is it best to leave the Trim/Tilt reservoir plug (screw) "in'" or "out" when filing it up. I've seen videos where folks say to do both ways. I see that leaving it out and cycling the motor up/down where fluid runs out, but that guy says it helps air escape and then once you stop...
  3. J

    1989 Johnson GT150 - Warning Horn

    Good evening, I have a 1989 Johnson GT150 (J150STLCEM) and I noticed my warning horn is sounding. On for about 3 seconds and then off, repeats. Thought it was low oil, as I've had that before, but that's short bursts of the horn. Oil reservoir is full. Horn stops when I turn engine off. I'll let...
  4. J

    1989 Johnson GT150 - Tachometer Issues

    I have noticed lately that my tachometer won't respond, well...responds intermittently. All of my fuses are good and seated and from what I can see all my wiring connections to the tach look okay. Now, I'm not an electrician and I may missing something easy for someone who 'knows' what to look...
  5. J

    1989 Johnson GT150 - Power Trim & Tilt

    I'm new here and could use some help. What should I inspect first when I 'trim out' (not under power) my motor and it make an intermittent scratchy/squeaky sound instead of the normal constant sound of the cylinder trimming my motor out. It's like it lost power to raise the motor. It'll "catch"...
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