Page 1 of 2 12 LastLast
Results 1 to 10 of 11
  1. #1
    Join Date
    Aug 2019
    Posts
    9

    Default More accurate Fuel Sender for Mobius?

    Is a more accurate Fuel Sender available for the Mobius?

    The gauge fluxuates by 1/4 tank the whole time we're riding, and the gauge is reading at least a 1/4 tank lower than it actually is at all times. So the gauge reads between 1/4 and 1/2 tank lower than it actually is at all times (except the first 15 minutes of riding when it reads Full).

    I read where a lot of drivers just estimate based on how far off it is, but I imagine there should be a more accurate sender than this.

  2. #2
    Join Date
    Oct 2013
    Location
    Ft. Collins, CO
    Posts
    685

    Default

    It's a float sensor so the fundamental problem is that the fuel is moving around due to the boat's roll and pitch; a more accurate sensor doesn't change that. Mine moves as much as a 1/4 when in an aggressive nose-up attitude/pitch like surfing. I think you just get used to it and only take an "accurate" reading when sitting flat, still and calm. Possible solutions would be to measure the tank in multiple locations or to measure roll/pitch and then calculate fuel volume but that is much more complicated than a single float sensor and a disclaimer that it's only accurate when the boat is level.
    2007 Mobius LSV
    1989 Sanger Skier DX - sold

  3. #3
    Join Date
    Feb 2019
    Location
    Tulsa
    Posts
    109

    Default

    Quote Originally Posted by gregski View Post
    It's a float sensor so the fundamental problem is that the fuel is moving around due to the boat's roll and pitch; a more accurate sensor doesn't change that. Mine moves as much as a 1/4 when in an aggressive nose-up attitude/pitch like surfing. I think you just get used to it and only take an "accurate" reading when sitting flat, still and calm. Possible solutions would be to measure the tank in multiple locations or to measure roll/pitch and then calculate fuel volume but that is much more complicated than a single float sensor and a disclaimer that it's only accurate when the boat is level.
    While I do agree you'll get fluctuation when the boat is level vs surfing, what I cannot accept is the fact that these boats read EMPTY when there is still 10 gallons in the tank (25% capacity).
    '06 Gravity XLV
    Wetsounds stuff

  4. #4
    Join Date
    May 2010
    Location
    Salt Lake City, Utah
    Posts
    1,050

    Default

    My LSV seems to register about 1/4-1/8 below what i actually have but i've just learned to deal with it. No biggie for me. My 2017 Tundra does the exact same thing. The gas warning light will come on and i will drive it until the computer says 0 miles till empty and i can only put in 30 gallons and it holds 38 gallons. Go figure.
    Scott
    2007 Mobius LSV with a lot of great upgrades and mods

  5. #5
    Join Date
    Jun 2007
    Location
    Vancouver, WA
    Posts
    5,158

    Default

    Mine is both top heavy and bottom heavy. When it's full it doesn't bounce. 3/4 down to 1/4ish it tends to bounce. Then from 1/4 down it's pretty stable again. I think I have a 40 gal tank but I've never been daring enough to run it that low. I'm pretty sure the most I've ever put in is 32 gal.

    And 38 gallons in a Tundra? Chit man, that's more than my long bed gas guzzling v-10 F350 used to hold...
    The years have been kind, it's the weekends that have done the damage.

    2001 MobiusV - Loaded with Ballast, Exile, Blood, Sweat & Beers

  6. #6
    Join Date
    Feb 2019
    Location
    Tulsa
    Posts
    109

    Default

    Quote Originally Posted by bergermaister View Post

    And 38 gallons in a Tundra? Chit man, that's more than my long bed gas guzzling v-10 F350 used to hold...
    No doubt! Had an '07 Tundra that held like 24 gallons and would get 10 mpg towing. Couldn't pass a gas station. Major benefit of the F150s w 36gal tank option.
    '06 Gravity XLV
    Wetsounds stuff

  7. #7
    Join Date
    May 2010
    Location
    Salt Lake City, Utah
    Posts
    1,050

    Default

    yea they up'd it to 38 gal in either '16 or '17. It's still a gas guzzler though, i only get about 10 mpg towing so the big tank is great.
    Scott
    2007 Mobius LSV with a lot of great upgrades and mods

  8. #8
    Join Date
    May 2013
    Location
    Vancouver WA
    Posts
    4,860

    Default

    I agree it'd be nice to have more accuracy on the bottom end of the tank. I have one gas receipt where I put in 35.74 gallons of gas into the tank. that means I had just over 4 gallons!?!?! That's kinda scary. And I went through all that in one day. :-O
    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

  9. #9
    Join Date
    May 2010
    Location
    Salt Lake City, Utah
    Posts
    1,050

    Default

    I tend to run both my cars and boat a lot lower in fuel than i probably should. It drives my wife crazy when the fuel light comes on and i tell her there's no need for gas, i have plenty left A couple of years ago we were on Lake Powell for the entire day and i kept a close eye on the fuel gauge. I knew we were getting really low and we were a long way from the marina as it started getting dark. I really started to get worried as we were cruising back thinking we were going to run out. As we got within about 200 yards of the marina the boat sputtered a few times and died! Luckily my buddy who was following us back in towed us the rest of the way haha.
    Scott
    2007 Mobius LSV with a lot of great upgrades and mods

  10. #10
    Join Date
    Jun 2007
    Location
    Vancouver, WA
    Posts
    5,158

    Default

    And guess who got no nookie that night...
    The years have been kind, it's the weekends that have done the damage.

    2001 MobiusV - Loaded with Ballast, Exile, Blood, Sweat & Beers

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •