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  1. #11
    Join Date
    Dec 2018
    Location
    Phoenix AZ
    Posts
    177

    Default Gravity III upgrade

    If your adding large bags in the lockers I highly suggest you get one 800 pump for each bag. Once you get over drilling one hole in your boat the next ones easy.

    I’ll get pics underneath a little later.


    First pic is pump just in front of the v-drive starboard side.

    Second pic is the pump on the port side of the v-drive.





    Sent from my iPhone using Tapatalk

  2. #12
    Join Date
    Jun 2008
    Location
    Parkston, SD
    Posts
    118

    Default

    As long as you’re doing it, why not use an 1100 or 1200 instead of an 800??? Also, why not increase the hose from 3/4” to 1”??? My original rear drain pumps both burnt out in the last couple years and I put the Rule 1100’s in from Wakemakers. I had to increase the size fuse but otherwise it works really well, even with 3/4” drain hose. I’m hoping to increase my drain hose this year to 1” to decrease drain time even further.
    twkoehn
    2007 Mobius LSV
    1100s in rear lockers
    750 lb IBS
    Acme 1847

  3. #13
    Join Date
    Dec 2018
    Location
    Phoenix AZ
    Posts
    177

    Default

    Quote Originally Posted by twkoehn View Post
    As long as you’re doing it, why not use an 1100 or 1200 instead of an 800??? Also, why not increase the hose from 3/4” to 1”??? My original rear drain pumps both burnt out in the last couple years and I put the Rule 1100’s in from Wakemakers. I had to increase the size fuse but otherwise it works really well, even with 3/4” drain hose. I’m hoping to increase my drain hose this year to 1” to decrease drain time even further.
    The only reason I went with 800 is because it wasn’t worth the extra money to re-do all the hoses and such just to gain maybe a minute or two during the fill time.


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  4. #14
    Join Date
    Jun 2008
    Location
    Parkston, SD
    Posts
    118

    Default

    Quote Originally Posted by Turbinesurgeon View Post
    The only reason I went with 800 is because it wasn’t worth the extra money to re-do all the hoses and such just to gain maybe a minute or two during the fill time.


    Sent from my iPhone using Tapatalk
    I would think using a 1200 would cut times by more than a minute or 2. It should cut times by 1/3. If it takes 15 minutes with an 800, it should take 10 minutes with the 1200.
    twkoehn
    2007 Mobius LSV
    1100s in rear lockers
    750 lb IBS
    Acme 1847

  5. #15
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    5,019

    Default

    I'd like to know what your fill and drain times are. Keeping the slow pumps and keeping the 3/4 line would be painful with 1100 rears and 1180 gravity bag... I'm well under 10 minutes with the T1200s and the larger hose.
    2008 Moomba Mobius XLV. Monster Cargo Bimini, WS Rev 410's, Polk Cabins, 3 Infinity Subs, PPI amps, WS420, Exile BT, upgraded ballast pumps, up to 3,500+ pounds of ballast, Blue LED's...
    1992 Supra Sunsport. **SOLD** 2k pounds ballast, Surf System, Blue LED's everywhere, decent audio system.
    Tow Rig: 2013 F150 Ecoboost FX4 (wife's rig) Other money pits include:1998 BMW M3 Cabriolet, 2009 Audic A6 Avant 3.0T, 2005 Kawasaki ZX-6R 636.
    www.TraysonsToybox.com

  6. #16
    Join Date
    Dec 2018
    Location
    Phoenix AZ
    Posts
    177

    Default

    Quote Originally Posted by trayson View Post
    I'd like to know what your fill and drain times are. Keeping the slow pumps and keeping the 3/4 line would be painful with 1100 rears and 1180 gravity bag... I'm well under 10 minutes with the T1200s and the larger hose.
    Under 10 minutes is really good. The 800s do a pretty good job. 14 minutes to fill 2 1100s and a 1380. I have the fat sacs that have a 3/4 inlet. I figured this would choke off the 1200 pumps and you wouldn’t get the full capability out of the pump. For the money I spent I am satisfied.


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