Ok, so I have some fuel in it.

I cannot tighten or remove the blade carrier at all. It just turns over the motor, which in turn pumps oil out of the exhaust port.

I will have to find a way to tighten this blade plate, or lossen it so I can then retighten it to where it is supposed to go. Any tips for allowing the bolt to be undone/tightened? I have tried spraying wd40 on the bolt and washer to hopefully loosen it, but it is still seized shut. Is there a good way to stop the boss moving?