Originally Posted by
piper_chuck
Thanks. The fuel is in a sealed jug and the color looks good. I've had it in my workshop, which is part of the house, all these years. Not so with the half full jug thats on my flight box. It is a really nasty looking dark color. I'll throw out the nasty stuff and give the fuel in the sealed jug a try at home.
The props are brand new and have also been in the shop. I'll check them over and replace the one that's on the plane.
Yeah, if the fuel is starting to turn brown the oil has probably started to polymerize. Given enough time and exposure to oxygen almost any oil will turn to varnish. As for props the ones you mainly have to be careful with are the old fashioned white nylon props. They dry out and get brittle. Back in the day people used to boil them to restore their proper moisture content but by now I wouldn't use one for anything but display. I would say the same goes for novelty props such as clear plastic.