If turning it upside down is a bit of a problem due to all your friends being away on holiday, then maybe try this:
Get a vacuum cleaner that has a "blow" mode and modify the end piece of the blow tube so that it has a hole in it where you can attach a small diameter PVC tube or similar.
If you do it right, it will create a venturi effect and you can use the other end of the small diameter PVC tube to suck out all the fuel in the crankcase.
Just make sure you don't spray petrol everywhere.
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[color=#808080][size=9]Yes,.. I too know how to waste Time and Money,...