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  1. #1
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    19 Reaction Porpoising

    I just got finished rebuilding a 19 Reaction. I finally got to take it out the other day, it all went good but the boat was plagued by porpoising in the 30-40 mph range. It was porpoising so bad even with two people at the bow that I didn't want to risk trying to push through that mph range. The current setup on the boat is a Johnson 200 v6 looper 20" mid with a lwp, mounted on a 10in hydraulic jackplate with a closed transom. I'm currently running a 24 pitch chopper prop. What do you guys think I should do? I was thinking a cleaver prop? Mount the motor lower (jack plate is at its lowest setting)? I would like to avoid trim tabs for the time being. Any help is appreciated thank you!

  2. #2
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    Put a 3 blade thru hub on it, they give more stern lift than a over the blade chopper. Should settle it down some.

    83 V-King, Mercury 3.0 back on the transom
    Let's Go Brandon, Let's Go Brandon.. Yell it till their heads x-splode.
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  3. #3
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    If that doesn't work, go to a 4 blade prop. What area of FL are you in? You shouldn't be running a cleaver or chopper on that boat with only a 200hp on it.....unless the only thing you're concerned about is WOT. You need a normal hub prop......I have a 21" pitch Mercury Tempest + 3 blade that I'm thinking of selling it.

  4. #4
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    So 2 posts and gone. No response. Seems to be a pattern lately.

    83 V-King, Mercury 3.0 back on the transom
    Let's Go Brandon, Let's Go Brandon.. Yell it till their heads x-splode.
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  5. #5
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    Quote Originally Posted by XstreamVking View Post
    So 2 posts and gone. No response. Seems to be a pattern lately.
    He's probably out of Miami. Everyone puts choppers on boats like that because they look cool at the sandbar. He got answers that he doesn't want to hear, that a chopper is the totally wrong type of prop for that boat, or at least what he's using it for 30-40mph (because the chop in the bay 85% of the time will beat you up going any faster).

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  7. #6
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    Chopper would be ok if his bottom didn't have a rocker....Telling part was the "just rebuilt" and now acts like a rodeo bull....It's effed up.

    83 V-King, Mercury 3.0 back on the transom
    Let's Go Brandon, Let's Go Brandon.. Yell it till their heads x-splode.
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  8. #7
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    I only used the chopper because I had it left over from a previous boat. Don't know why you are trying to insult me or my boat.

  9. #8
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    What kind of low water pickup? A Bob's cone? 10 inches of setback might be too much. And that boat won't ever go fast enough to need a cone.

    Ive seen those type of hulls run good with some choppers. I loaned a 26 long rake big cup chopper to a friend with a paramount. He loved it. Got it close to 70.
    ANTI40​It's just an idea.

  10. #9
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    Quote Originally Posted by Whaaaaat View Post
    What kind of low water pickup? A Bob's cone? 10 inches of setback might be too much. And that boat won't ever go fast enough to need a cone.

    Ive seen those type of hulls run good with some choppers. I loaned a 26 long rake big cup chopper to a friend with a paramount. He loved it. Got it close to 70.
    I honestly don't know what type of low water pickup it is, I bought the motor with it. I know I don't need a LWP but the motor was a good deal. The reason I have 10 inches of setback is I closed in the transom so I needed room to tilt the motor.

  11. #10
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    Figured you might post up after a few smart azz remarks. But seriously, check the bottom of the boat and see what you have got....Sounds like it's rockered. Little rocker is good. Too much and it will bounce.

    83 V-King, Mercury 3.0 back on the transom
    Let's Go Brandon, Let's Go Brandon.. Yell it till their heads x-splode.
    Rebuild thread:
    http://www.screamandfly.com/showthre...-it&highlight=
    http://www.screamandfly.com/showthre...cs.&highlight=
    Videos

  12. #11
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    If you mean if the bottom is straight, it pretty straight. The boat is has its original stringers as they were in perfect shape so I assume the hull is still straight.

  13. #12
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    What is your prop shaft height all the way down?

    If hull bottom is straight and prop shaft isn't too high, you might need to lose that chopper and get a full barrel prop with some cup.
    ANTI40​It's just an idea.

  14. #13
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    Reaction has a pad or no?
    ANTI40​It's just an idea.

  15. #14
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    Yes the boat has a pad. The motor all the way down the prop shaft is around 3-4 inches below the pad.

  16. #15
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    Did you try to lift motor with the plate to see if it settled down?

    Extreme might be on to something, you need to check hull bottom for straightness and flex. Lay under the boat and push up on the hull around the pad and the pad itself. See if there's any flex. And put a straight edge on it.

    Even with all the setback and a chopper it shouldn't bounce so bad you can't drive thru it.
    ANTI40​It's just an idea.

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