Gas gauge

[Paul S]

Trying to get a gas gauge working in a 1989 Lund Pro V. I put power to the back of gauge and the needle jumps about 1/16 of an inch, otherwise it reads empty no matter how much gas is in tank...any ideas?

Thanks!!

[Valv]

There are 4 wires in back of your gauge.

Purple (+)

Black (-)

Pink (sending unit signal)

Blue (night lighting)

Try to jump the Black - wire with the Pink. Needle should go all the way to full.

Check connection on sending unit on top of gas tank (you might have to open floor access), and try to touch the Black wire with Pink wire on tank, if needle reads full your gauge is ok, if it doesn't it could be a faulty gauge or bad wire all the way to dash.

[united jigsticker]

I had a 1996 Lund that did the same darn thing.

If I shook the boat good and hard (or hit some hard waves, etc) the gauge would read the proper fuel level.

I do remember being a ways up the lake the first time it stuck on me, and thinking, "Holy Shananigans, I know (or at least I thought) I had more gas then that."

I opened up the access and could visually see there was about 2/3 of a tank in the resevoir...A couple big waves later and she was reading like a dandy.

[Craig_S]

Hey Jigster, how do you look at the access or into the tank? I've got a 2003 1700 fisherman and take it on some remote trips. Near as I can tell, when the gauge reads empty, I have about 4 gallons in the tank. I've never used the reserve switch, but am wondering how much reserve is in the reserve?

I can't think of any way to look at the tank or dip a stick. So I carry an extra 6'er every where I go in case I run out.

How do you look?

Craig

[united jigsticker]

In 2003 the tank is in the floor, right?

I have a 2004 now where the tank is in the floor. I can't see it either.

My other one was a 96 and the tank was mounted like an aquarium in the back near the transome, so you could open the battery access and visual the tank and its contents.

I don't have a reserve switch.

[bhs91]

I just went out today and had a similar problem...Does not read at all, but when I turm on my navigational lights, it goes all the way to full and I know I have about 1/2 a tank is all. When I turn the Nav lights off, I am empty again. I like the idea of hitting a few good waves . That may end up being what happens.

[Valv]

Fuel gauges are not ran by the positive of boat but from the negative. They measure voltage from sending unit which is a rheostat (just like a light dimmer). A float mounted on unit will move the rheostat and give "more or less" negative to the gauge, that's why if you touch the pink wire with a black (-) wire it will go to Full.

Are you sure your gauge is installed correctly ? If it max out when lights are on it might be wrongly connected.

[birdswacker]

I've got the same problem on 1996 lund pro sport 1700. I beleive my gas tank is in the front of the boat under raised deck?

[united jigsticker]

Wheres your fuel fill?

[Valv]

Your tank is in the floor, right in the middle, you might have to remove a large section of it to access.

Check Lund web site, they show fuel tank location on their diagrams.

[NAGORSKI]

I have a problem with my 99 starcraft super fisherman. The gauge falls to 6:00 position when off, and only goes up to E when I turn the key on. Any ideas? Thanks.

[SteveWilson]

Quote:

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Your tank is in the floor, right in the middle, you might have to remove a large section of it to access.

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. A question on that large section of floor. Is that screwed in with wood/sheetmetal screws or bolts? I'm wonding if I take off that deck section if I'll be able to put it back in

[united jigsticker]

It's screwed, and yes, you can put it back in.

[Valv]

Quote:

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A question on that large section of floor. Is that screwed in with wood/sheetmetal screws or bolts? I'm wonding if I take off that deck section if I'll be able to put it back in

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They use wood/metal screws but they are Stainless Steel so they won't rust, if you loose any replace it with same kind or it will get rusty in no time.

[bhs91]

I fixed my gauge problem...I had some wires going to the wrong battery. I had tried run some of my accesories off my deep cycle and just leave my starting battery just to start the motor. The problem is that my fuel gauge is linked to my ignition and apparently this needs to come from the same battery. I switched everything back and it is fine.