1965 scout 80 fuel tank question

Discussion in 'General IH Tech' started by RonFrame83, Jun 21, 2015.


  1. RonFrame83

    RonFrame83 Farmall Cub

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    I have a 1965 scout 80. Right now it has a single fuel tank. I am planning on installing dual fuel tanks. My question is how does the fuel gauge work with both tanks? Is there a switch that changes from left to right tanks? I know there is a switchover valve for switching the fuel from one tank to another. But what about the fuel sending unit readings? Any help in this matter would be grateful. A wiring diagram would be nice too.
     
  2. gwinter1129

    gwinter1129 High Wheeler

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    image.jpg Ron, go to your auto store. In the electrical department you will find a three way toggle switch; ON - OFF - ON. The hot wire for one tank will go on the left and the other one on the right. The light line vendors (maybe scoutco.com) sells the label you put on it. See the one on my dash, says select L and R? Greg
     
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  3. scout2000

    scout2000 Dreams of Cub Cadets

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    Hello Ron,
    If you already have all your parts, i.e. pass side saddle tank, lines, sender, etc , already accumulated, please just pass over my post.

    OTOH, If you are going to go to the trouble of installing and plumbing a new fuel tank, you might want to consider installing a conventional fuel tank between the frame rails in the rear of your Scout. Better capacity, much easier to fill vs. the saddle tanks. Food for thought.

    Greg,
    your dash always looks great!
     
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  4. scout2000

    scout2000 Dreams of Cub Cadets

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    Ron,

    one more thing.
    Scout owners who install a conventional fuel tank, many times, will use the area previously used by the saddle tanks as a hidden storage area. I have seen installs where a hole in the top was cut out from the bed area of the Scout then hinged.
     
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  5. gwinter1129

    gwinter1129 High Wheeler

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    Great for hiding contraband when crossing the Texas boarder. Greg
     
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  6. gwinter1129

    gwinter1129 High Wheeler

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    Jerry is right. I went through the hassle of keeping both tanks in my first build. I am going with Jerry on my second build. Greg
     
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  7. RonFrame83

    RonFrame83 Farmall Cub

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    Thanks for the replies
     
  8. George Womack

    George Womack Y-Block King

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    You don't need an ON-OFF-ON switch, as there is no need for an OFF position. The switch should be a SPDT ON-ON switch which willl have three terminals. The center terminal goes to the gauge, and the other two terminals go to each of the two tank senders.
     
  9. gwinter1129

    gwinter1129 High Wheeler

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    Gee George, pick pick pick. Thanks for keeping us straight, greg
     
  10. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    You can also replace the manual valve and switch with an electric switch valve that swaps lines and senders all with the flip of the switch.
    They also make them in 6 port version to switch inlet and return lines to dual tanks for EFI!
     
  11. George Womack

    George Womack Y-Block King

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    Somebody's gotta do it! :)

    Never let up, do ya Bill? :hammer: ;)
     
  12. mcsmythe

    mcsmythe Farmall Cub

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    You could just run it like my '61 with the wonderful equalization tube. Only need one sender then.........however it takes a while for the sender to read the correct level. It's great to fill the driver tank(where the sender is) and the gauge reads F, then about 3 minutes later the gauge reads 1/2 as the gas has equalized between the two, you never really can top them off.
     
  13. Bill USN-1

    Bill USN-1 Moderator Staff Member Moderator

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    Not till every carb is retired and I have hugged every tree!
    Just doing my part! :sailor:
     
  14. Buckeye

    Buckeye Farmall Cub

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    Has anyone had any luck replacing the tank selector valve with a brass T fitting that would essentially tie the two tanks together so they act as one tank? Is this what mcsmythe is referring to in his post above?
     
  15. Champagne Scout

    Champagne Scout Farmall Cub

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    I've got the dual saddle tanks on my scout as well. I've attached a picture of the switch I've got for mine. Most of the time I just use the one tank as its a pain to fill up both tanks at the gas station. Let me know if you have questions and I can look at mine. I've also got a wiring diagram some place I'll try to find.
    - Champagne Scout
     

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    Last edited: Jun 25, 2015
  16. Tucson scout

    Tucson scout Farmall Cub

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  17. Dana Strong

    Dana Strong Dreams of Cub Cadets

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    If you do that and park or drive a while on a sideways-sloped road or hill with full tanks, fuel will run out of the lower one through the fill tube. Also, if driving on the side of a hill like that with one side lower, the system will start sucking air when the fuel in the lower tank drops below the level of the "T", even if the lower tank is still half full. Being on the opposite side of the vehicle, the right tank will be lower than the "T" with just a small angle difference.
    My selector valve has four inlet ports, one for each tank and two going to lines ending at quick-disconnect fittings into which I can plug auxiliary tanks.
    Contrary to advice above, my gauge switch isn't marked and has a center "Off" position, adding one extra hindrance to the average fool who might try to steal the Scout, get a few blocks away, stall in the middle of an intersection, look at the gauge and see "it's out of gas"...when the valve is just shut off.
     
  18. Champagne Scout

    Champagne Scout Farmall Cub

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  19. scout2000

    scout2000 Dreams of Cub Cadets

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    Davis said he was going to do this, or something very similar on his "Goldie" Scout 800 build.
    I wonder how that turned out for him?
     
  20. Dana Strong

    Dana Strong Dreams of Cub Cadets

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    IIRC, with the stock valve on my '61 turned to the area between tank settings, the two tanks were connected together...letting it behave as if it had just a "T". Since I used mine on logging roads and in the Sierras or Nevada desert, such behavior could cause problems. Maybe in town in flat country it wouldn't matter much, except when trying to fill both tanks to the top.
     
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