Welcome to the Bennett Trim Tab Vendor Forum

Discussion in 'Bennett Trim Tabs Vendor Forum' started by Tabman, Feb 1, 2011.

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  1. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    Bennett Trim Tabs are original equipment on many models of SeaRay boats. On this forum we will be posting Tips on how to use, maintain and troubleshoot your Trim Tabs.

    We will be delighted to answer any questions you may have about Trim Tabs.

    Tom McGow
    Bennett Marine
     
  2. 1956olds

    1956olds Active Member SILVER Sponsor

    Oct 31, 2009
    michigan,saginaw bay
    1992 370 ec
    twin cummins 6bta's 300 hp
    Rl80 pathfinder radar/chartplotter,SH 2150 matrix vhf w/ais
    quicksilver 8
    Hi tom ,ive never had automatic tabs ,do they tend to over adjust at slow speeds or in a chop?
     
  3. MonacoMike

    MonacoMike Well-Known Member SILVER Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    97 270 Sundancer
    85 Sea Ray Monaco 197
    8.2 Mercs,
    7.4 BII
    260hp Alpha 1
    Thanks, I'm sure I'll have questions soon as I've never had tabs and recently got a boat with them. I recall you had a great post back awhile that you may want to post here on tab operation.

    Thanks again, MM
     
  4. Ray 40

    Ray 40 New Member

    105
    May 11, 2009
    La Conner, WA
    1997 400 Sedan Bridge w/ lower helm
    3116 Cats
    3116 Cats.-
    8 kw Westerbeke
    Tom,

    Our boat is a 1997 Sedan Bridge w/ 350 Cats. I hang a Noverania dink on Nick Jackson davit on the stern - weght about 500 lbs + davit - ( additional 100#?).
    With the Gen. set and my potable water in the stern I am obviously stern heavy .
    Do you have a solution using tabs to raise the stern at lower rpms and planing at a more comfotable, lower speed. Now I am over 2000 rpm to get on the step - I would like to be able to be on the step at a lower rpm for a more comfortable, slower cruise. (I understand that the Cats. run best at 80% WOT- but I would at times like to cruise at 50% or so.)
    I've had different opinions given that : I should install fixed tabs over the prop pockets - I should increase the width of the (2) existing Bennett Tabs (looks like I could add 4-5" width on each tab - add to existing tab width by welding a 2-3" piece onto the traling (aft)edge of each tab.
    What in your professional opinion will help me the most (without eliminating the dink)
    Thanks,

    Bud
     
  5. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    MM,

    I just posted it! http://clubsearay.com/forum/showthread.php?t=39630

    Tom
    Bennett Marine
     
  6. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless

    1956olds,

    Good question!

    The Auto Tab Control (ATC) constantly adjusts how much and how often it adjusts the Trim Tabs. The system "looks" at how much the boat reacts when it moves Trim Tab to adjust the boat's attitude, then it either moves it more or less depending what is needed. This way the system compensates for both boat speed and sea conditions.

    Tom McGow
    Bennett Marine
     
  7. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    Bud,

    In order for me to give you advice on the best solution would it be possible to tell me the size of the Trim Tabs (Sea Ray does not tell us which ones we make for them are used on a particular model)? Also a photo of your transom would be really helpful.

    The best option may be a combination of the things you mentioned, and we may want to see if there is room between the propeller pockets to add a second set of Trim Tabs.

    Adding a second set of Trim Tabs is quite straight forward and if there is room can give the best results. The additional Trim Tab actuators (rams) are teed into the existing hydraulic lines and operate in tandem with the original ones .

    Here is a photo of a boat in Australia that I recently helped the owner fit a second set of Trim Tabs. While this one is an outdrive powered boat, the principle is the same. He is delighted with the results

    [​IMG]

    Tom
    Bennett Marine
     
    Last edited: Feb 1, 2011
  8. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    I am going to lock this thread and ask that you post your questions on a new thread for each question. It will be easier for people to see what threads may be of interest to them if they have the same question.

    Thank You,
    Tom McGow
    Bennett Marine
     
    Last edited: Feb 1, 2011
  9. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    ...
     
  10. Tabman

    Tabman Member

    676
    Jan 11, 2007
    The Tab Cave
    boatless
    boatless
    ...
     
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