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Porpoising

Discussion in 'Members Zone: Props and Power' started by mbhenry1955, Jan 20, 2018.

  1. mbhenry1955

    mbhenry1955 Well-Known Member

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    I have a 2250 ESP with a Honda 250 mounted 1 hole up and turning a 14x21 Enertia prop. At WOT and trimmed up fairly high but still within my WOT RPM range my boat will porpoise.
    Will raising the engine up 1 more hole help control the porpoising?

    Thanks
    Mike
     
  2. cwag911

    cwag911 Moderator

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    Porpoising happens when you are over trimmed as far as I know. I don't think motor height will change it.
     
  3. Michiman

    Michiman Well-Known Member

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    I'm with Carl on that. If I over-trim I can get the same effect.
     
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  4. adkboater

    adkboater Well-Known Member

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    Ditto....... too much trim would be the issue, raising the motor another hole might help your rpm/top end but won’t stop the porpoising.
     
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  5. mattb

    mattb Well-Known Member

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    I trim up til that starts, then just bump it back down a bit til you find your happy spot. Funny thing is, it seems I can eek out a little more speed with just a little porpoise.
     
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  6. mbhenry1955

    mbhenry1955 Well-Known Member

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    I have found that out also!
     
    Vikingstaff likes this.
  7. JTaylor

    JTaylor Well-Known Member

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    Yep, me too. Then the "slow down" voice warning gets activated from the seat next to me.
     
  8. mattb

    mattb Well-Known Member

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    You missed the mute button option on the order form didn't you.
     
  9. royal4

    royal4 Well-Known Member

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    HA, never works.... I've found when you try and activate the mute function it just gets louder.
     
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  10. BigKahuna

    BigKahuna Well-Known Member

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    Even if you had the mute button option ........the built in Mute Over ride button will kick in!!!
     
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  11. Havasu

    Havasu Well-Known Member

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    That's pretty much what I did to find the "sweet spot." After extensive testing in all sorts of conditions, I've found if I just trim it 3 bars up from the bottom position I can leave it there all day. Works fine whether I'm cruising, WOT or pulling a skier/wakeboarder or tuber. I'll bring it up of course if I'm beaching in shallow water. I don't see a big difference in fuel economy and I don't have to keep messing with the trim all day. It's takes some experimentation and every boat is different so it will take a few outings until you easily see where you should run it. I think we've all gone through this transition.
     
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  12. lakeliving

    lakeliving Well-Known Member

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    My boat is very sensitive to trim in the sense I can trim it up quite a bit before blowout. I noticed this fall with a light load and really trimming up I was going over 6k rpm. I want to say 6200ish. Something I’ll look at again when I put it back in the water soon.
     
    Link and mbhenry1955 like this.
  13. Michiman

    Michiman Well-Known Member

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    Yeah, just rub it in. :)
     
  14. lakeliving

    lakeliving Well-Known Member

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    It won't be until March before it gets wet. Might as well still be in MI!
     
  15. BigKahuna

    BigKahuna Well-Known Member

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    Well you've got a lot of other things to take care of in the mean time.......Getting settled at your new job, preparing to move in to that beautiful home, tying up loose ends in Michigan, etc etc. You'll have plenty of time for boating later......
     
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  16. Link

    Link Moderator

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    Why? you want to be shoveling snow in March ;)
     
  17. lakeliving

    lakeliving Well-Known Member

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    The seasons don't bother me. I enjoyed snow, just not months and months of it. There is nothing like that first decent winter snow before Christmas. I'll miss that. Maybe that will change though!
     
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