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Thread: Fuel level gauge

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    PBN User lchauvin88's Avatar
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    Fuel level gauge

    How accurate is the analog fuel level gauge? Mines reading above half, sitting in water, engine off Key on.

    Is there a way to "stick" the tank to check level in inches compared to the height of the tank?

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    d4l
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    The analog one is NOT to be trusted! Depending on how the boat sits in the water, in plane, stsnding still etc


    I like turning money into noise!
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    PBN Charter Member hook'em's Avatar
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    It can be "trusted" but you need to pay attention as the new owner and get a sense of how it works. I find mine is most accurate on plane and on the trailer. And the readings are very different than sitting at rest floating. Minium reserve should be 10%. Pay close attention until you learn how your rig is.

    Edit: or you could roll with the Kefurr plan and just be sure your tow boat membership is paid up.
    Last edited by hook'em; 07-25-2017 at 10:10 PM.
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    PBN User lchauvin88's Avatar
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    Seatow would be a good thing to have. I am just cautious with my fuel level. Im taking the boat to grand Isle Saturday about 60miles round trip and next Saturday to the islands, Going to have Kefur show us around out there. Ill probably just go fill up the fuel before i leave Saturday morning.
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    d4l
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    Sounds like a good ide! Wish I could come


    I like turning money into noise!

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    PBN User lchauvin88's Avatar
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    Now that Im getting comfortable operating it. I want to start venturing around and seeing different waters with it.

    Our usual Lake is only a 20 min car ride to the launch and a 15 min boat ride from the launch.

    The Tarpon Rodeo is This weekend and i havent been since 2006. I just want to ride down there and check out the tent, the catches and maybe get a T shirt. Spent alot of my childhood down there fishing.

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    PBN Charter Member BajaDan's Avatar
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    My gauge does not start reading below full until I have about a half tank left. This is with the boat in a normal running attitude. The sender is at the back of the tank so nose high running keeps that part full. The tank is not rectangular. The bottom of the tank is a Vee (well trapezoid really but you get the idea). There is much less fuel in the bottom half of the tank than the top half. The result is the gauge is highly nonlinear.

    If you want to you can calibrate the gauge. If you ever empty the tank (which I recommend you do, see fuel thread in technical discussion) then put 10 gallons in and mark the gauge, 20 gallons and mark the gauge. Continue until the gauge reads full. Fuel beyond that does not matter (to the gauge).
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    PBN User lchauvin88's Avatar
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    Sounds like a good winter project Dan. I appreciate your insight. I Decided that ill just keep putting fuel in it when it reaches half a tank, until Im Ready to Mark the gauge like you said.

    I was expecting the tank to have the V shaped Bottom but didnt expect the sensor to be at the rear of it. Odd I suppose, but an engineer put it there for a reason.

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    PBN Charter Member BajaDan's Avatar
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    That is where the fuel pickup is also. Which makes sense as that allows you to draw the most (but certainly not all) the fuel out of the tank.

    And of course the fuel tanks are long and skinny which compounds the problem.

    A more convenient way is to just look at the gauge reading when you get off the water. Lets say it is showing 3/4 or just starting to bounce off full, anything that is convenient to remember. Then go fill up. See how much it takes. Then you know what you've used at that gauge reading. If you want to get really fancy you can look up the tank capacity, assume that you wont be able to draw the last 5 gallons out, and then have an estimate of how much you have left at that same gauge reading.

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    PBN Charter Member Kefurr's Avatar
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    Fuel level gauge

    Grand Isle by boat or car?

    Fuel procedure, at least in my world!


    1 Buy seatow membership
    2 Fill boat with gas
    3 Enjoy boating until run out of gas
    4 Call seatow to bring gas
    Go to nearest marina and repeat steps 2-4
    Last edited by Kefurr; 07-26-2017 at 11:09 AM.
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    PBN User lchauvin88's Avatar
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    Quote Originally Posted by Kefurr View Post
    Grand Isle by boat or car?

    Fuel procedure, at least in my world!


    1 Buy seatow membership
    2 Fill boat with gas
    3 Enjoy boating until run out of gas
    4 Call seatow to bring gas
    Go to nearest marina and repeat steps 3-4
    By boat. If i launch at C&M Marina in Lafitte, LA its only 30ish miles each way.

    What's a Seatow membership cost?

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    PBN Charter Member Kefurr's Avatar
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    Seatow is $179 a year if you trailer you can add trailer coverage for 10-15 more.

    I think your boat has an 80 gal tank if so you can use this as a guide
    You probably get around 2.5 mpg
    80 x 2.5 = 200 mile - 20% (safety) = 160 miles without worrying
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    PBN User lchauvin88's Avatar
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    Quote Originally Posted by Kefurr View Post
    Seatow is $179 a year if you trailer you can add trailer coverage for 10-15 more.

    I think your boat has an 80 gal tank if so you can use this as a guide
    You probably get around 2.5 mpg
    80 x 2.5 = 200 mile - 20% (safety) = 160 miles without worrying
    102g tank. I'll check into it. Good price considering what a tow cost without coverage.

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    PBN Charter Member Kefurr's Avatar
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    Fuel level gauge

    Quote Originally Posted by lchauvin88 View Post
    102g tank. I'll check into it. Good price considering what a tow cost without coverage.
    Damn that's a big tank!
    Do you run regular gas or non-ethanol?
    You can pickup the seatow info at the marina when you're in Biloxi

    One gas delivery without out seatow is more than the yearly membership

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    PBN User lchauvin88's Avatar
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    Quote Originally Posted by Kefurr View Post
    Damn that's a big tank!
    Do you run regular gas or non-ethanol?
    You can pickup the seatow info at the marina when you're in Biloxi

    One gas delivery without out seatow is more than the yearly membership
    Regular. I do add the sta-bil for ethanol gas. None of the local pumps have non ethanol.

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    PBN Charter Member 642mx's Avatar
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    My gauge is accurate as long as the boat is on smooth water or idling. If it's choppy out, the needle bounces around a bit.

    I hold 60 gallons and top it off every trip out. The extra weight of a full tank is nice in a Hammer when the water gets rough.

    If you're using the boat every weekend or every other weekend, I would save the money on the Stabil. I run 87 octane, 10% ethanol in mine and have no issues. As a matter of fact, it soots the transom up worse with non ethanol. I use a stabilizer over winter, but stopped using additives during the season. It didn't see any gains in economy or performance with it and I never had fuel related issues without it.
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    PBN Charter Member Kefurr's Avatar
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    My gauge is most accurate at two points
    Full and empty!!!

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    PBN User 4 Good Times's Avatar
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    I replaced mine with a universal float of same length. Not that big of a deal - however - it still isn't accurate. 90 gal tank - after gauge reads half I start looking for fuel. I tracked my recent trip to LOTO and did 438 miles by water for $550. Tubing, skiing, and cruising. I was good with that and moved on. I still need a bigger, newer, and more tech equipped boat. Good Luck!

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    PBN User lchauvin88's Avatar
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    I'm going to fill up and report back Sat morning. I believe I have 8 hrs of run time since I filled the tank but it may be 12. I can't recall the hour meter honestly.

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    PBN Charter Member Kefurr's Avatar
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    Quote Originally Posted by lchauvin88 View Post
    I'm going to fill up and report back Sat morning. I believe I have 8 hrs of run time since I filled the tank but it may be 12. I can't recall the hour meter honestly.
    Do you have a gps on the boat ?

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