fuel in tank

[qkduk42]

I just got my first buggy today ofna 9.5 mbx. All the paper work i got with it says that I'm not supposed to have fuel in the tank when no in use. Is this true, and if so then why?

 

[robriguez]

gas tanks are not air tight. After a time sitting in the tank the fuel will absorb a bit of moisture. So you will get some water in the tank. This is not good for your engine and will make starting it the next time you go out almost impossible. My rule of thumb is that if I think its going to be more than a few days until my next run I empty the tank.

 

[qkduk42]

thanks for the info

 

[cbreaker]

Gas isn't so expensive that I worry about losing a little gas. I make sure the tank is empty and the engine has burned off all the remaining gas in the fuel lines and carb before I am done for the day. Then, I set the flywheel to BDC before it cools down.

If I'm not going to use the car for more then a few days, I also put in some after-run to help fend off corrosion.

Taking a little care of the engine can really extend it's life.

 

[militarymaxx]

Yup, nitro fuel is hygroscopic. Fancy word, I know. It means it has the ability to extract moisture right out of the air. If you left your fuel bottle open it wouldn't take long for moisture droplets to start to form in it. That's why it's also a good habit to squeeze any extra air out of the gallon (or quart) container before you cap it. That air inside the container has moisture in it. The compnents of nitro fuel will also separate over time. So shake up your container before you use it.