Recent content by jlrosine

  1. J

    Slow plane at high altitude 5.0L MPI, please help

    I'm not sure what RPMs I'm at, the tach while I'm on water never says anything above 3000, but my ear tells me it's probably higher than that, though I could be wrong. I purchased the RPM laser tool, I'll try to get an accurate reading to see how far off the tach is if any. I can't imagine...
  2. J

    Slow plane at high altitude 5.0L MPI, please help

    I figured I'd close this thread up with what feels like a successful change. As stated before, I don't care too much about my top speed so I ended up dropping down to a very low pitched prop. I called a local shop here (Jim's prop shop) in Denver, gave him the specs of my drive ratio/engine...
  3. J

    Slow plane at high altitude 5.0L MPI, please help

    Thanks all I appreciate the help. I'll try to get ahold of a 17 for a test.
  4. J

    Slow plane at high altitude 5.0L MPI, please help

    Oh gotchya. Yeah I don't think I should have anywhere near a 20p at this elevation. I've only had 3 blades in the past so the 4-5 blade trend is pretty new to me. I'll try to find a 3 blade to test local, it's definitely the "cheap" thing for me to test at this point. I've got one boat dealer...
  5. J

    Slow plane at high altitude 5.0L MPI, please help

    Do you think the 3 blade props are better than the 4/5 blade for hole shot, or just an experiment at elevation? I'll take off the foil today and test it, then try to get a 3 blade at some point. My last boat had a 3 blade, I think a black max and it was great for hole shots but it also had the...
  6. J

    Slow plane at high altitude 5.0L MPI, please help

    Thanks for the reply Scott. Since changing the sterndrive ratio is quite costly, do you think that lowering my prop pitch might help? If so, what might you suggest there? If I'm having hole shot issues, do you think removing the foil will help that, or just to experiment?
  7. J

    Slow plane at high altitude 5.0L MPI, please help

    Hi everyone. I just purchased a new to me boat, I've owned boats before and probably should have done more due diligence on this one (more on that later), but here's the story. Boat details 2004 Tahoe 204 WT Deck Boat, basically a bowrider, 20' 4" long Drive: 5.0L Mercruiser MPI V8 / Alpha 1...
  8. J

    Mercury 20hp only getting 21mph normal?

    Thanks for the suggestion. I'll try to do that over the next few days. I'd probably be fine with 21mph if it gets on plane faster, hopefully the hyrdofoil will help with that (from what I've read it does).
  9. J

    Mercury 20hp only getting 21mph normal?

    Hi all, I have some questions and hopefully I'll get some suggestions on what to do next. Problem (or so I think). I can only peak at about 21mph, and getting on plane takes a long time (struggles without weight in front). I have a 14' Tracker V Guide boat, no console so it's pretty light by...
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