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  1. #31

    Re: Outboard vibration through boat??

    In answer to the above - have removed all extra bits from the boat and will go for a lap before the first service in two weeks and let the dealer take a look.
    Unfortunately, at this early stage I think they will get a little suss if they get the motor in and I've been removing props and mucking around, so at least they will get to see it as I have found it initially. There's not a single flake of paint off the engine or prop as yet, so if anything, could only be a balance issue and I'd love them to see it that way. Still surprised that SOLAS tends to think that Suzi props are just mickey mouse and that they couldn't better. Good thing I guess!!

  2. #32

    Re: Outboard vibration through boat??

    looking forward to some answers for this problem seb as i just replaced my yam 60 with a second hand suzuki 80 and on the first trip was wondering why the motor wasn't as smooth as the yamaha and also seemed to have a bit of a howl to it as well as vibration ,the motor only has 12 hrs on it and like you was looking for the cause in the boat .
    a transom plate was added whereas the yamaha was bolted direct to the transom but thats the only change.

  3. #33

    Re: Outboard vibration through boat??

    So it's not just me eh?? No worries - will update when I find out more. I was enjoying the overall smoothness and worrying about run-in revs etc for a while before I actually noticed the buzzing and you know how it is...then you notice it more and more!! Anyhow, still a beautiful donk, but we'll see....

  4. #34

    Re: Outboard vibration through boat??

    might have to get on the Suzuki forum mate , as they talk mainly about Suzuki's

  5. #35

    Re: Outboard vibration through boat??

    Well, weather too crap for a test run, but engine apparently checked out all ok at first service. Will have to see exactly what RPM we are talking about, but needless to say was told of the inherent resonant vibes of 4 strokes when I picked it up.

    Anyhow, will investigate some more on the next run, bearing in mind motor has all of 6 hours on clock and was operated at limited RPM, so I suppose we'll see.
    Also was told about NZ product 'vibra-stop', apparently just for times like these???

  6. #36

    Re: Outboard vibration through boat??

    Quote Originally Posted by seb7701 View Post
    Well, weather too crap for a test run, but engine apparently checked out all ok at first service. Will have to see exactly what RPM we are talking about, but needless to say was told of the inherent resonant vibes of 4 strokes when I picked it up.

    Anyhow, will investigate some more on the next run, bearing in mind motor has all of 6 hours on clock and was operated at limited RPM, so I suppose we'll see.
    Also was told about NZ product 'vibra-stop', apparently just for times like these???
    Is this dealer speak for 'we have no bloody idea' as the harmonic balancer should alleviate it.

  7. #37

    Re: Outboard vibration through boat??

    Well, I did wonder...
    It is very early days in the engine run-in, so I guess will have to establish exactly what rev range seems to be the issue and then scour the boat whilst cruising to see what I can find.
    Just ironic for an old two stroke owner from way back like me.....I thought these four strokes were the buttery-smooth answer to everyone's prayers, only to be told what a 'common problem' 4 stroke resonance is???

  8. #38

    Re: Outboard vibration through boat??

    Seb, you can get a harmonic vibration but usually it is in very low revs say 1100 or so, if this is the case then at double the revs, 2200 revs it should cut in again before disappearing once you up it. If it is happening at only a spefic rev range only say 3300 as in your case then it is something else. Keep hammering the dealer as you didn't have it before.

  9. #39

    Re: Outboard vibration through boat??

    Have seen it with a Yammy 250. Bow rail was vibrating like a guitar string. Seemed to happen at around the point where the boat was on the plane but not by much - about 3000 - 3500 rpm. Have also had similar with my own 2 stroke ( E-Tec) when running a large bladed 3 blade at around the same revs. With my own rig I don't get it with other prop designs. The Yammy was running a 4 blade.
    "I soak the worms in rum. The fish love em and the worms die happy"
    "Alcohol is not the solution to your problems...................but then again, neither is milk"

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