If this is your first visit, please click the Sign Up now button to begin the process of creating your account so you can begin posting on our forums! The Sign Up process will only take up about a minute of two of your time.

Follow us on Facebook Follow us on Twitter
Results 1 to 10 of 10
  1. #1
    Registered Pure Energy's Avatar
    My Boats:
    2001 Superboat Y2K
    Join Date
    Oct 2000
    N. NJ, Eastern LI

    Turn knobs instead of switches for trim and tabs?

    My boat is very sensitive to weight/wind and balance. When I go to adjust a tab or the trim I always over compensate because there is little control over power to the pumps. Could a knob be used to adjust the amount of power to pumps? Do the joystick type controls do what I am asking or do they operate like the switchs?


  2. #2
    Gold Member Gold Member ziemer's Avatar
    My Boats:
    1995 Allison Grand Sport & 1990 30' Velocity
    Join Date
    Apr 2006
    St. Cloud, FL
    You might want to try the older style pumps which have the same motor but have a metal resevoir rather than the plastic tank. The mercruiser style pumps tend to "over-run" a little even after you let off the switch. I noticed it mostly when I switched from the old to the new style on my Allison. Made a difference.
    1995 Allison Grand Sport
    1998 Mercury Stock 2.5-260 SS

    1990 Velocity 30' - 502 MPI's

  3. #3
    Charter Member #232 Charter Member Audiofn's Avatar
    My Boats:
    1979 Formula 302, 99 Formula 353, 81 Donzi 18 2+3 with 454
    Join Date
    Oct 2000
    Carlisle, MA USA
    The wire that goes into the switch is for a relay at the pump. If you change the voltage going to the switches the only thing you will do is burn out your relays faster. You would have to lower the power at the pump but that also would probably lower the life span of the pump. As ziemer said you may want to try a different pump.
    Put your best foot forward!

  4. #4
    Gold Member Gold Member phragle's Avatar
    My Boats:
    22 Avanti, 25 Nova, 2 turtle doves and a partridge in a pear tree,SBYC
    Join Date
    Apr 2006
    Toledo Oh
    it could be done, not with stock parts, might be able to do it with a servo operated flow valve, but it could get complicated in a hurry....
    please read the fine print

  5. #5
    Forum Regulator VIP Member Sydwayz's Avatar
    My Boats:
    37' Active Thunder AVH; 17' Speedliner Cat OB
    Join Date
    May 2001
    How about a thicker oil? Then the pump will run a bit slower; tab will move a bit slower, and you will be able to fine tune a bit better.

  6. #6
    My Boats:
    Join Date
    Aug 2006
    Simsbury ct
    My tabs do the same thing it drives me crazy. one always stays moving slightly longer than the other after I let go of the button so they are never the same.

  7. #7
    Registered Jigsaw89's Avatar
    Join Date
    Apr 2004
    New Jersey


    I believe everyone that fine tunes their ride via trim and tab has experienced this same issue. When is the boating industry going to produce controls that are 100% precise? Does anyone build quality? After all, the average new boat price is far greater than the average automobile price, yet we have sub par to average quality controls to choose from. Why haven't automobile or aircraft quality controls made their way into the boating sector?

  8. #8
    Registered McGary911's Avatar
    My Boats:
    Donzi Criterion
    Join Date
    May 2002
    Jacksonville, FL
    How about something that does your tab adjustment off of your indicators? You can have a couple of 10 position knobs with some hefty detents. You're running at 3 and want 5? 2 clicks clockwise. It wouldn't matter if 1 pump was faster than the other, as the indicator would know when it hit the position, and stop the pump. If it had a little overrun on 1 tab, the indicator would know it, and move it back a hair till it's perfect. You can leave the rockers for fine tuning (5 1/2 position). You could also do it all manually with the rockers if you wanted with an override button of some sort.

    This could all be done electrically (not by me ) . You'd just have to ensure your indicators were adjusted properly.

  9. #9
    Join Date
    Sep 2007
    Nothing like a nice electronic feedback system to raise costs while drastically complicating what is an extremely simple system.

    I think thicker oil may be a better idea!

  10. #10
    Registered waterbum's Avatar
    My Boats:
    1986 Fountain 10 Meter
    Join Date
    Nov 2000
    Overland Park, KS
    Maybe smaller valving somewhere in the system. Most of the rams used in boats are built with stock internal hydraulic pieces. Restrict the flow to inflow and outflow of the rams. That would slow down the movement giving greater control. Might make the pumps work harder?

Similar Threads

  1. trim master trim tabs for 26 sonic
    By 26sonic in forum Sonic
    Replies: 8
    Last Post: 06-23-2009, 09:14 PM
  2. Adjusting drive trim (no trim tabs)
    By dloftis in forum Baja
    Replies: 8
    Last Post: 03-12-2009, 08:08 AM
  3. Trim Switches
    By Courtholl in forum Pantera
    Replies: 2
    Last Post: 04-06-2007, 01:40 PM
  4. Trim switches...
    By formula1 in forum Formula
    Replies: 1
    Last Post: 08-16-2006, 02:11 PM
  5. Trim switches
    By Cord in forum General Boating Discussion
    Replies: 41
    Last Post: 02-06-2002, 01:50 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
All times are GMT -5. The time now is 05:00 PM.
Powered by vBulletin® Version 4.2.0
Copyright © 2016 vBulletin Solutions, Inc. All rights reserved.
Search Engine Optimization by vBSEO 3.6.1
Original Poster In Postbit provided by Original Poster In Postbit v1.0.0 (Free) - vBulletin Mods & Addons Copyright © 2016 DragonByte Technologies Ltd. Runs best on HiVelocity Hosting.
Copyright 2011 OffShoreOnly. All rights reserved.