Tough place to be but not impossible. Use a lot of patience and go slow. I would start by using an easy out to back it out. Do not use a lot of force as it could swell and make it tighter. I've never had good luck with them. I like to use a cold chisel and hammer to slowly tap it out making sure to not get into the motor casing. At times when they're really tight I've had to cut it from the inside with a hack saw towards the threads without touching the case threads, then using the cold chisel and fold it to the center starting at the cut. Work slowly and walk away when you half to take a break. Hope this works and let me know. Anyone else with any tricks?