[bsmith0404]

Fill the tank to prevent condensation and use Sta-bil. Your other option is to drain the tank, if there isn't a drain, pull the fuel line and drain. For the generator, you can go either route. With either, shut the fuel feed off to the carb and run the engine until it dies or drain the float bowl. The biggest concern is varnish in the carb from old fuel. Sta-bil will help, but getting the gas out of the carb is the best way to prevent it.