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  1. #1
    Join Date
    May 2003
    Location
    south east michigan
    Posts
    264

    Default 4 blade prop vibration?

    Last fall I banged up my 13 by 13 3 blade prop so I bought a 4 blade to replace it.It is a 13 by 12 brass prop.It seems to have a slight vibration but you can't really feel it,it's like you can hear it.Anyone ever have this problem.The boat seems to have a better hole shot.I gained 200 rpm and lost 3 mph top speed.
    jy

  2. #2
    Join Date
    Jun 2007
    Location
    Sugar Land, TX
    Posts
    459

    Default

    I dinged mine (13 x 13) and had it repaired. In the meantime I replaced it with a 13 x 12 as well, but a 3 blade. I know exactly what you mean. When pulling up a boarder I hear more of a rattling noise, like it's coming from under the steering wheel. It lasts 3 - 5 seconds and then it's normal. I guess it just creates that much more torque that it vibrates the entire steering column? I do have better holeshot, and I too lost about 3 mph on top end.

  3. #3
    Join Date
    Jun 2008
    Location
    Ottawa, Ontario
    Posts
    929

    Default

    OJ props are known to vibrate so get an ACME.
    2008 Outback V - gravity III ballasts, perfect pass star gazer, hydraulic wake plate, depth finder, water stainer, rad-a-cage tower, board racks, tower mirror, bimini top, audio package d, graphics package e, appearance package, cockpit & tonneau cover, mooring cover, black stainless rubrail, docking lights, OJ 14.25x14.0 prop.

    Toys: Ronix Viva 136 with Kai bindings, Phase5 Drew Danielo Pro, Straight Line Sumo Sac 750lb, 450lb, 125lb ballast.

  4. #4
    Join Date
    Jun 2009
    Location
    Chester, SC
    Posts
    169

    Default

    4 blade props cause vibration. 3 blade props cause vibration. 5 blade props cause vibration.

    On the other hand, 4 blade props don't cause vibration, 3 blade props dont cause vibration, and 5 blade props dont cause vibration.

    The thing is, all props respond to being spun. If your boat would have came with a 4 blade prop, and you dinged it and went to a 3 blade prop, you would notice some vibration. Simply because it is "different" vibration.

  5. #5
    Join Date
    Jan 2008
    Location
    Tallahassee, FL
    Posts
    14,066

    Default

    Well said. It's kind of like ceiling fans.
    My Mom said I'm not allowed to get wet!
    2008 LSV (sold)
    2000 Outback LS (sold)
    LLTR!!!!!!!!



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