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  1. K

    Merc 3.0 Timing Question

    Hi all, Trying to set the timing on a friends merc 3.0LX (1997 alpha) with EST. We had to replace the timing cover and the new one does NOT having the tab with the timing marks on it. Is there any kind of a mark on the block to go by or do I need to find TDC and make my own mark? Thanks!!
  2. K

    Pressed trim button, entire eletrical system died

    Hi, OK, here we go with another weird one. Still tinkering with my friends merc 3.0 was running it on the hose today and pressed the button to lift the drive up a little bit so I could spin the wheel back and forth... Well, when I did that, the engine died and the dash went dark...
  3. K

    Looking for an opinion -- I-6 or V-6?

    Hi all.. Not sure if this is the correct place for this -- mods, please move it if I guessed wrong :) thanks! Well, I am working on restoring my '74 Thompson runabout (18'). It had a 120hp OMC electric stringer. Despite the bad rep it seems to have on this and other boards, I like both the...
  4. K

    Weird issue merc 3.0

    Hi, Got another strange issue for ya'll. Got a merc 3.0 that seems to be "working against itself" When you crank this one, it will act like it almost can't push past a certain point in it's rotation -- and if you release the key, it will blow back through the carb. Compression is 120 120...
  5. K

    Which is better? Pourable transoms

    Hi all, I have been reading a lot about the pourable transom epoxy mixes being used on this and other boards and I think it will be the way I go about replacing the transom on my '74 Thompson.... There seem to be 3 major brands out there: Sea-Cast, Nida-Bond, and Arjay 6011 Does anybody...
  6. K

    mercruiser 3.0 idle help needed

    Hi all, I've got a brain scratcher going on here and hope someone will chime in and help me out. I'm helping a friend get his boat running again after several years of storage.... 1997 mercruiser 3.0l Engine runs GREAT above 1200 RPM. Engine runs ROUGH between 800 and 1200 RPM Engine runs...
  7. K

    compression question

    Hi, Looking at a friends boat. early 90's searay 16.5 with merc 3.0 alpha1 It has been sitting in his driveway (uncovered!!) for a few years. He Said it wouldn't start, so he rebuilt the carb, and after the carb rebuild, it ran rough and would not idle. So, I checked the carb -- float...
  8. K

    OMC stringer drive I/O upper unit -- whines + constant milky oil HELP!! :o)

    Hi,<br /><br />I have a 1974 Thompson with a 120hp OMC stringer drive I/O in it. The engine runs like a top (MUCH less to be said for the dorky carburetor, though), the electric shift works everytime (now that I fixed that infamous and ALMOST ALWAYS misdiagnosed problem -- which can be fixed...
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