What's up with fuel gauge on 7XX series???
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Thread: What's up with fuel gauge on 7XX series???

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    Firewood Bandit's Avatar
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    What's up with fuel gauge on 7XX series???

    Thursday I bought a gently used 2018 X758 with 42.9 hours on it. I have put 2.3 hours on it so far, very nice BTW. The fuel tank was pretty full when I checked an it seemed to be going down at a rate I would expect. It was a tick off full. After putting the above hours on it it was in 3/4- 1/2 range. As I was mowing in the orchard which has a fair slope I look down and see an orange icon on the dash lit and also see the fuel display virtually empty and it was flashing. As I was turning it would then jump back up to the 1/4 range and the flashing would stop. Once I got back down to level ground it was reading 1/2.

    I take it this is fairly normal?
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    Zebrafive's Avatar
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    Hills make my x485 fuel gauge read low compared to level ground, especially when "sidehilling" with down hill side to the right.

    I also notice the last 1/2 of the tank goes a lot faster than the first 1/2, it's not linear at all. But at least I have fuel gauge, compared to my former JD 285.

    I would be glad to test it for you all summer , I'll even meet you1/2 way to pick it up
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    coaltrain's Avatar
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    This has been mentioned in various threads about the fuel gauge on the larger x series. Seems to be just the way they are.
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    etcallhome's Avatar
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    NORMAL shouldn't be but it is.

    When Harley owned the 4x4 x590 it was the same way, but his new x738 gas gauge is terrible. I finally quit looking at the gauge till I have maybe a hr of mowing left.

    I then go and fill the tank, sometime it takes maybe 3 - 3 1/2 gallons.
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    Quote Originally Posted by coaltrain View Post
    This has been mentioned in various threads about the fuel gauge on the larger x series. Seems to be just the way they are.
    It's a similar situation on the smaller X-series as well. Sometimes getting an accurate fuel level reading is as difficult as getting an accurate hydraulic level on the larger tractors.

    It's no wonder they just go with translucent fuel tanks on the big box store models.
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    Quote Originally Posted by jgayman View Post
    It's a similar situation on the smaller X-series as well. Sometimes getting an accurate fuel level reading is as difficult as getting an accurate hydraulic level on the larger tractors.

    It's no wonder they just go with translucent fuel tanks on the big box store models.
    No more translucent tanks on basic units. Starting with the D series the tanks are black. They use a weight activated POS fuel level indicator. My '15 X310 has a translucent tank that is viewed from rear of machine.

    Sent from my LGL52VL using Tapatalk
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    Firewood Bandit's Avatar
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    Figures, what should one expect for $14K.
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    Zebrafive's Avatar
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    Still better than the float that sunk on my JD 285 and kept the low fuel light ON.
    I replaced it the first time and the parts guy said the gas eats the glue of the float halves and then the float sinks.
    When that one died, I just "tried" to fill after every use, but I ran out a few times

    When I had to get a used transaxle, the Craigslist seller had the gas tank from the parts tractor on his scrap pile. I asked it the fuel sender worked. He told me "no idea, take the whole tank if you want". So I did. I swapped it into my tank and it worked.

    It was still working when the tractor was stolen.
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    This happened on everything I have ever owned that used liquid fuel & and had a fuel gauge. Trucks, tractors, cars. Or maybe I believe it is normal because I have always lived on sloping property.
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    Pretty normal unfortunately, I agree that on a 15k mower it should be accurate. By the time I get done cutting after 3 hours my gauge is flashing at me, but it only takes 3gal of fuel, with 2 still remaining in the tank.

    Rick
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