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  1. M

    1971 Mercury 7.5 Phase Maker Learnings

    I thought it would be useful to post a few of my learnings on the 1971 Mercury 7.5 Thunderbolt ignition system --known as the phase maker. I've learned a ton from this site over the years and am hopeful some info I gathered might be useful to others. Background: A few of years ago I bought a...
  2. M

    1971 Mercury 7.5 Ignition Issues

    A while ago I purchased an ancient Mercury 7.5 HP that had sat for years and years without running. The outboard looked really nice under the hood, and the price was right and so I didn't mind spending a little money on parts This is one odd little engine under the flywheel; it has a stator...
  3. M

    1976 Evinrude 15 HP Lower Unit Troubles

    Hey there, I'm really hopeful one of the OMC gurus can help me out. Last week I purchased an Evinrude 15 hp model 15604R that hadn't been run for a while. The exterior looked nice and it turned over so I took a gamble. The previous owner bought it from someone else but was never able to get...
  4. M

    Mercury 100 ELPTO trouble --won't run on 4

    Really need some help. My 1989 Mercury ELPTO refused to plane at the start of my annual spring walleye trip. Started fine but got only a strange popping sound at half throttle and above. Assumes this means the 2x2 system never kicked in and never jumped to 4 cylinders firing. I changed the...
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