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  1. #1
    Join Date
    Nov 2008
    Location
    Boat (Southampton)
    Posts
    7,980

    Default Trim Tab label on boat - I don't understand

    sorry if this doesn't make sense as it may be I've misread the label or more likely, forgotten the exact wording but there's a label on the boat that suggests I should never trim from port to starboard or words to that effect.. I didn't understand why at the time and don't now.. I'll re-read the label when next down to the boat but does this ring any bells with anyone in the meantime?

    thanks Gary

  2. #2
    Join Date
    Nov 2009
    Location
    living in cheshire, boat in Anglesey
    Posts
    1,776

    Default

    Hydraulic trim tabs, one pump. Moving one tab down whilst simultaneously raising the other one?

    Graham

  3. #3
    Join Date
    Nov 2004
    Location
    fareham hampshire
    Posts
    910

    Default

    Quote Originally Posted by oGaryo View Post
    sorry if this doesn't make sense as it may be I've misread the label or more likely, forgotten the exact wording but there's a label on the boat that suggests I should never trim from port to starboard or words to that effect.. I didn't understand why at the time and don't now.. I'll re-read the label when next down to the boat but does this ring any bells with anyone in the meantime?

    thanks Gary
    On Benett trim tabs
    If you operate both switches in opposite directions at the same time it will blow the fuse

  4. #4
    Join Date
    Nov 2006
    Location
    essex
    Posts
    4,722

    Default

    Quote Originally Posted by stelican View Post
    On Benett trim tabs
    If you operate both switches in opposite directions at the same time it will blow the fuse
    That's ****. Cr*p is a naughty word, they use it on TV

  5. #5
    Join Date
    Jan 2009
    Location
    Stratford on Avon
    Posts
    8,359

    Default

    Gary, stab in the dark, but it might be due to a single large lump, lots of torque, when you open the throttle, you will not only get prop wash, but a turning moment, which may need some trimming out.

  6. #6
    Join Date
    Jan 2005
    Location
    Nomadic
    Posts
    9,135

    Default

    There is one pump.
    it runs forward and reverse.

    There are two solenoids, one for left one for right.

    you can move them both down together or both up together.

    Trying to move one up and one down at the same time is going to cause an issue and possible airlocks as the oil gets turned into whipped cream.
    .

  7. #7
    Join Date
    Oct 2002
    Location
    Essex Bradwell UK
    Posts
    2,784

    Default

    Too much information is a dangerous thing.

  8. #8
    Join Date
    Aug 2009
    Posts
    786

    Smile

    Quote Originally Posted by DAKA View Post
    There is one pump.
    it runs forward and reverse.

    There are two solenoids, one for left one for right.

    you can move them both down together or both up together.

    Trying to move one up and one down at the same time is going to cause an issue and possible airlocks as the oil gets turned into whipped cream.
    not sure that i follow....you can only move both tab's together?
    on my old benett tab's you can lower or raise them independently.
    their's just the one big pump..
    (obbviously you cannt lower one and raise one exactly at the same time..)
    Last edited by moonraker 36; 01-02-11 at 17:20.

  9. #9
    Join Date
    Nov 2004
    Location
    fareham hampshire
    Posts
    910

    Default

    Quote Originally Posted by rubberduck View Post
    That's ****. Cr*p is a naughty word, they use it on TV
    I really dont understand you strange comment
    What I stated is a fact as you will be powering the pump in opposite directions at the same time
    seen it done many times try it yourself if you have bennett tabs

  10. #10
    Join Date
    Nov 2006
    Location
    essex
    Posts
    4,722

    Default

    Quote Originally Posted by stelican View Post
    I really dont understand you strange comment
    What I stated is a fact as you will be powering the pump in opposite directions at the same time
    seen it done many times try it yourself if you have bennett tabs
    It would seem fortunate that my boat came supplied with a decent system which lets you adjust trim in any way you want. I didn't mean your post was cr*p, but the bennett system would appear to be.

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