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I'm upgrading to the Cies senders and had a quick question.  How much fuel can be in the tank when swapping them?  I burned one tank dry, and have a little over 6 gallons in the other.

Is that low enough to remove a sender?

 

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Youd want them empty. Im getting them done on my plane right now and they removed all the fuel. Also 6 gallons is relatively easy to sump.

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32 minutes ago, Niko182 said:

Youd want them empty. Im getting them done on my plane right now and they removed all the fuel. Also 6 gallons is relatively easy to sump.

I was thinking of leaving some in for post install testing.  I know I have to drain it all for calibration, I was just trying to plan ahead a little.  

I need to drain it all eventually, I'm also going to be weighing the plane.  Just trying not to drain it 3 times lol

I'm installing an EDM900 and cleaning all the crap I can out of the plane.  I've already pulled 6lbs of old wiring for antennas and what not.  

 

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2 minutes ago, ragedracer1977 said:

I was thinking of leaving some in for post install testing.  I know I have to drain it all for calibration, I was just trying to plan ahead a little.  

I need to drain it all eventually, I'm also going to be weighing the plane.  Just trying not to drain it 3 times lol

I'm installing an EDM900 and cleaning all the crap I can out of the plane.  I've already pulled 6lbs of old wiring for antennas and what not.  

 

Id say drain the fuel now. If the airplane is getting weighed, get it done before you calibrate the tanks. The unusable part of the fuel doesnt matter in the calibration proccess. For the weighing, you want onky unusable fuel. Topping the tanks off and subtracting usually results in a loss of useful load.

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