Complete fresh install, no plugins. Add full fuel to Cessna Skyhawk either by typing or using sliders, metric or imperial, engines switched off.
![](https://questions.x-plane.com/?qa=blob&qa_blobid=16306757428156657020)
On the runway, prep electrical systems, fuel resets to default value.
![](https://questions.x-plane.com/?qa=blob&qa_blobid=16654059746825657797)
Again add full fuel via config screen, fuel shows up on fuel gauges,
![](https://questions.x-plane.com/?qa=blob&qa_blobid=14448077821678557143)
start engine, fuel defaults again ![crying crying](https://questions.x-plane.com/qa-plugin/wysiwyg-editor/ckeditor/plugins/smiley/images/cry_smile.png)
So this is the Steam XPlane 11.10 on Mac, completely fresh install, no plugins.
All help appreciated!
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Update:
Started plane using manual procedure i.e. not using the menu option to prep the electrics and start the engine and it kept the fuel value correct. So it looks like a problem with the menu option.