Recent content by jakec

  1. jakec

    Speed Plateaus at 5200rpm

    Thank you, I finally decided to post my restoration pics here, if you want to see more. https://forums.iboats.com/threads/1959-dorsett-san-juan-restoration.770179/
  2. jakec

    1959 Dorsett San Juan Restoration

    Here are pics from my finished restoration from the winter of 2021-2022. I've been posting on here for prop stuff and posting pics of the boat here and there. So I thought I would share this album. I attached a pic here to get your attention. The extent of the restoration almost everything...
  3. jakec

    Speed Plateaus at 5200rpm

    Also I was looking at the specs for the boat to see what the length and beam was, and I see they rated it for max hp of 105. I have a 115, and it is prop rated now, compared to back then. so I am probably 20-30 hp over what they intended.
  4. jakec

    Speed Plateaus at 5200rpm

    I was reading an old post about extending a boat, no don't worry I am not interested in doing that in the slightest... but I found an interesting passage that I think applies. Even tho the boat in the original post is a skagit, my make is pretty similar in form. I did the math and my length/beam...
  5. jakec

    Speed Plateaus at 5200rpm

    Just found this passage in the manual. So I am probably just fine having my max speed achieved between 5,200-5,800 rpm. And yes, you’re correct nothing has changed except I stopped trimming it so much, when I first had the engine I was ventilating but now I’ve realized the speed increase stops...
  6. jakec

    Speed Plateaus at 5200rpm

    I got the simple mechanical throttle unit, so I am guessing it is cable. When I ride my motorcycle up a steep hill, I can open the throttle with no increase in rpm and we just call it lugging it. I would think this would be the same here.
  7. jakec

    Speed Plateaus at 5200rpm

    It is a 2022. I just pulled the manual out to flip thru later, and see if there is such a thing as a rev limiter. I don't think there would be tho, not at that rpm, as the stated max rpm is 6,200.
  8. jakec

    Speed Plateaus at 5200rpm

    I don't know if that's a feature, I'll need to look at the manual .I thought it may mean pitch was too high.
  9. jakec

    Speed Plateaus at 5200rpm

    We didn't get to take the boat out for a couple months and just had it out this weekend. I was messing around in the upper range again and found this. I pushed past 5,200rpm and maintained for a little longer. The speed peaked at 35mph at 5,800rpm. If I pushed throttle forward further, rpms...
  10. jakec

    Speed Plateaus at 5200rpm

    I was thinking maybe I can take the boat to the prop shop, that way they can look at the transom, hull shape, outboard mounting, current prop etc, take all that into consideration, and then make a suggestion.
  11. jakec

    Speed Plateaus at 5200rpm

    I don't think so. It was on a nice 4 bunk trailer when I got it, and I swapped it to another 4 bunk trailer. Anything Is possible I suppose but there's nothing I can see with the naked eye.
  12. jakec

    Speed Plateaus at 5200rpm

    Given the difficulty of moving the engine on the transom, I'm not going to experiment there right now. I would be fine with my current speed, rather than go to that length. I do have an AV plate whale tale that came on my previous outboard. I could put it on.. but not sure if I want to go...
  13. jakec

    Speed Plateaus at 5200rpm

    I believe if you zoom in on the dead on prop pic, you can see the hub, it is a light grey color, and it doesn't appear to have ever slipped. The edges are nice and sharp.
  14. jakec

    Speed Plateaus at 5200rpm

    So I actually previously had the Mercury 1150 mounted too low. I had the AV plate about 1.5" below the hull. This was because I just set the outboard on the top of the transom and bolted it down, and didn't think about where the AV plate aligned. But I also had a problem with the lip of the...
  15. jakec

    Speed Plateaus at 5200rpm

    Here are the requested pics. I’m uploading from my phone so hope they turn out ok. Took one extra photo to show how the plate lines up with the transom pretty spot on.
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