Gas Gauge

[SpreeFree]

On my 1986 Honda Spree, the gas gauge has always read Full since I bought it. Im trying to figure out the source of this problem, I recently took off the side panels and notices that coming off of the gas gauge wires, there are actually 3 wires. Two of the three are connected properly, but the third, which is blue is just hanging off and connected to nothing, is this the possible source?

[mousewheels]

The 1986 Spree needs a 3 wire sensor in the tank. 85 and below had 2 wire, and there's not a simple wiring change to make it work, the dash gauge side is different too. I think reading stuck 'Full' is consistent with others findings. There is a Spree service manual, which will have wiring diagrams on this site.

[Kenny_McCormic]

You can wire it to read half scale, buts its worthless that way. I just leave it unhooked, been meaning to apply 12 volts to the gauge and bring the needle to empty.

[Lunytune]

You can wire it to read half scale, buts its worthless that way. I just leave it unhooked, been meaning to apply 12 volts to the gauge and bring the needle to empty.

That means you have to either take a can with you, or fill the tank every 20 miles. Best to fix the gauge.

SpreeFree, hang with mousewheels. He'll get you fixed or die trying.

[JJ Joseph]

That means you have to either take a can with you, or fill the tank every 20 miles. Best to fix the gauge.

I just keep a small 6" stick under the seat, marked "E" & "F". You find "E" by running it out of gas (that's the hard part). It's about 1/2" above the bottom of the tank. I know that's a lazy solution, but it's how we always measure fuel in when flying homebuilt airplanes when not sure how much gas is really on board in the wing tanks.

[Lunytune]

Just bought be a new Spree last Friday. Former owner told me don't let it get below 1/4 tank or it would quit. This morning my biker babe and I took a short tour. Gauge read 3/4 tank when we started. It died before we got back to the campground, so she took my Elite and sent my son back with gas can. It took quite a bit although it was not empty. When filled, gauge still read 3/4 tank. So I guess it's time to do two things.
1. Fix the gauge. New battery is already in order, so consistent voltage might help that.
2. Pull the in-tank filter which is probably plugged in bottom part, and install in-line filter.