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Old 10-16-2010, 01:13 PM   #1
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Gas gauge problem on my boat

The gas gauge on my boat does not work. I got a new gauge thought that was the problem but no luck. When I read with the switch off from the input to the ground at the gauge I read 70 ohms. With the switch on I read 9.6 volts at the same place. I cannot reach the sending unit as it under the flooring. I think the console will have to come out and the tank slide toward the front to access the sending unit. I know it not a RV but they should be almost the same. Any ideas ?

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Old 10-16-2010, 02:31 PM   #2
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Originally Posted by diandtom View Post
I think the console will have to come out and the tank slide toward the front to access the sending unit. I know it not a RV but they should be almost the same. Any ideas ?
Tom, I'm thinking that you're right about RV and boat systems being similar. The first thing that needs to be ruled out is a good ground. I'm sure that corrosion on a boat may be more prone to occur so I would check that first. If you were to measure the voltage from the tank empty vs full is there any difference in the input to the gauge?

Perhaps we'll have to plan a trip up your way to check out the boat!

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Old 10-16-2010, 02:55 PM   #3
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It took a few minutes longer than bike storage, hot water tank tool, squeaky floor issues and air condition repair shops but this should get you all set up.

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Old 10-16-2010, 03:14 PM   #4
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Thanks Mike and Mike,
The ground seems to be good. I do need to do some more checking. The tank is almost full, but I am going out in it when I get back home. If the ohms don't change after running some maybe the sending unit bad. If it bad I can see noway to change it, with out doing more work than I want to do. By the way Mike, I still got the pop in the floor. I am getting use to it now.. lol
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