gas guage question
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gas guage question

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    Senior Member Delemorte's Avatar
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    Default gas guage question

    So i have two tanks. however when i filled up my passenger side tank my fuel level showed full on my guage, even before i filled the driver side. Is this normal that the guage only reflects one tank?

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    Glendale Arizona Squirtcha?'s Avatar
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    I'd think it would depend on how they've wired it up. I'm not sure they can even wire two senders to one gauge without using some sort of toggle switch to read each one individually. Most the ones I've seen will have a separate gauge for each tank, or the switch you can throw to read one or the other. Typically with two side tanks they will empty out evenly if both are filled. This being the case you really wouldn't need a read on both tanks, unless you didn't top em both off to start with.

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    Senior Member jetboatperformance's Avatar
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    Shawn ,my current big boat for example ,has two tank senders and one dash guage but is equipt with a double input single output switch .When "jogged" side to side it reads R or L ,I run one tank to a low level (not out) and then the other. Althought lots of dual tank setups will feed at nearly the same rate just like Squirtha said ,some also wont as well .I've always advocated running one tank at a time. my theory is that if one tank runs out or low before the other the system will start to draw air from the "out" side We use manual brass tank switching valve but there are also Electric switching devices that will handle tanks, senders and even returns $$ Tom

    (on my Flatty I use my ski flag handle as a "dipstick" )

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    Cantard 71hallett's Avatar
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    Dont know if this helps but full means bad ground and empty means bad power if you are getting bad readings.

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    Senior Member H20MOFO's Avatar
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    I don't know if it's what you have going on, but the tanks in my tahiti would " self level" if both valves were on.
    Another Hot Boat refugee

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    Senior Member Futs's Avatar
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    Quote Originally Posted by Squirtcha? View Post
    I'd think it would depend on how they've wired it up. I'm not sure they can even wire two senders to one gauge without using some sort of toggle switch to read each one individually. Most the ones I've seen will have a separate gauge for each tank, or the switch you can throw to read one or the other. Typically with two side tanks they will empty out evenly if both are filled. This being the case you really wouldn't need a read on both tanks, unless you didn't top em both off to start with.
    Damn Dan you are on a roll. I will leave all the answers to you. Every thread i have looked at this morning you were on it.


    What he said........

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    Senior Member Delemorte's Avatar
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    Ill add this. i have a brass lever in the back that only allows one tank to run at a time. However i do have some toggles on my dash that are not marked that i had no idea what they did....

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    Glendale Arizona Squirtcha?'s Avatar
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    Quote Originally Posted by Futs View Post
    Damn Dan you are on a roll. I will leave all the answers to you. Every thread i have looked at this morning you were on it.


    What he said........
    I don't know squat. Just guessing.

    That's why my favorite board words are........I think, it seems like, maybe, I wonder if, is it possible, I've heard, I've seen......etc. etc.
    Last edited by Squirtcha?; 04-16-2008 at 08:43 AM.

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    Senior Member NiceGuyEddie's Avatar
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    Quote Originally Posted by Delemorte View Post
    Ill add this. i have a brass lever in the back that only allows one tank to run at a time. However i do have some toggles on my dash that are not marked that i had no idea what they did....
    Take the lever off and throw it in the spare parts box.

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    Senior Member Delemorte's Avatar
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    Quote Originally Posted by rIVERtRASH View Post
    Take the lever off and throw it in the spare parts box.

    the book i have says not to remove that other wise one tank will syphen off the other.. not sure how thats bad but i did not know.

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    Senior Member Robert Jonsson's Avatar
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    Quote Originally Posted by H20MOFO View Post
    I don't know if it's what you have going on, but the tanks in my tahiti would " self level" if both valves were on.
    gravity will cause both tanks to self level if the line connecting the 2 tanks does not go higher than the fuel level. if those lines are above the fuel level then they will not self level.......... doesnt anyone remember science class?

    as far as the switch thing. i think it comes to preference. i was told that if you're gonna draw off 2 tanks at the same time then the 2 lines need to be the same exact length and diameter up to the "T" . otherwise you will draw off one tank faster than the other

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    Senior Member Widetrack's Avatar
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    Quote Originally Posted by jet4fun View Post
    gravity will cause both tanks to self level if the line connecting the 2 tanks does not go higher than the fuel level. if those lines are above the fuel level then they will not self level.......... doesnt anyone remember science class?

    as far as the switch thing. i think it comes to preference. i was told that if you're gonna draw off 2 tanks at the same time then the 2 lines need to be the same exact length and diameter up to the "T" . otherwise you will draw off one tank faster than the other
    On my old flatty the tank lines came off the bottom of the tanks, on my new boat they pull out the top and go down in the tank! This goes out to a tee one tank to the other across the back of the transom then to the pump. so you are saying it will pull from one tank and not both on the new boat without a valve in line ???

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    SR
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    Cajun Member SR's Avatar
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    Quote Originally Posted by Widetrack View Post
    On my old flatty the tank lines came off the bottom of the tanks, on my new boat they pull out the top and go down in the tank! This goes out to a tee one tank to the other across the back of the transom then to the pump. so you are saying it will pull from one tank and not both on the new boat without a valve in line ???
    Even though I have equal length hose from tanks to T, I have ran one tank dry before the other and started to pull air from the empty tank.(tanks fed from top)I will damn sure rig the new boat like Tom suggests.

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    Senior Member Widetrack's Avatar
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    What about weight side to side? Just have to keep the tanks even!

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