Inaccurate gas gauge

Information and questions on GL1500 Goldwings (1988-2000)
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Inaccurate gas gauge

Post by 5str48 »

1988 GL1500 - gas gauge goes from full to empty after 3 gallons. What would be the most likely culprit - faulty sender unit or the gauge itself. Could I try bending the float arm if it is the sender unit?

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Andy Cote
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Re: Inaccurate gas gauge

Post by Andy Cote »

Not uncommon on a GL1500. There are several posts on this topic, most of which are resolved by bending the float arm.
2015 Goldwing, basic black

Previously: GL1200 standard, GL1200 Interstate, GL1500 Goldwing, GL1500 Valkyrie Standard, 2000 Valkyrie Interstate, many other Hondas
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Re: Inaccurate gas gauge

Post by AZgl1800 »

Pull the fuel pump.

empty the tank, then pour in exactly 3.0 gallons of gas.

key on, OFF/ON/OFF switch to OFF.

Bend the float arm until the gauge reads exactly 1/2 tank.

the result is:
the 1st 100 miles it still shows full.

from the 1/2 mark, it is almost accurate to the 1/2 gallon of gas as it goes down.

at Empty, there is about 1/2 gallon or less of fuel...

To me, it made life a hell of a lot easier to know exactly how much gas is LEFT in the tank, not how many miles are on the Trip Meter.....

Varying terrain, and a heavy throttle has a lot of effect on MPG.

the gauge will be accurate for you, no matter how many miles down hill you coasted off that mountain.

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Re: Inaccurate gas gauge

Post by Rambozo »

5str48 wrote: Thu Mar 04, 2021 5:51 am What would be the most likely culprit
Honda ;)

While the gauge is about useless, I find the low fuel light is very predictable.
Last edited by Rambozo on Thu Mar 04, 2021 2:34 pm, edited 1 time in total.
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Re: Inaccurate gas gauge

Post by offcenter »

I use the trip odometer.
My bike gets a fairly consistent 42 miles to the gallon.
So when the trip odo reads 200 miles, it's time to start
looking for gas. With 200 miles showing, it's nice to know
that there is still about a gallon of gas left.
George in Jersey.
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Re: Inaccurate gas gauge

Post by Solo So Long »

There is no law or regulation regarding gas gauge accuracy for motor vehicles. In fact, the only such law that I know of is regarding airplanes, and it merely says that the gauge must show empty when the tank is empty.

On vehicles that I know have a working fuel gauge, my poilicy is to never pass a gas pump if the needle is at or below 1/4.

On vehicles that I DON'T trust the gauge, I figure out nominal miles per tank, and top it off when it gets to half of that number.

About 15 years ago, I rented a brand new U-Haul truck. It ran out of gas with 1/3 showing on the gauge.

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