650 coupler change out

[Beef stew]

so im was trying to change out a 650 coupler to a 550 coupler. when trying to take the 650 coupler off the threads i believe stripped and now just spins on the crankshaft freely and wont spin off at all. any suggestions to how i can get this off now?? not sure a puller is the right move since it will probably mess the threads up more. thanks

 

[wanderer1]

Cut it

 

[Beef stew]

With a torch? Or a dremel what. It’s a really tight fit to get in there.

 

[Pro-pulsion]

3 jaw puller...no wait lol...cut it Dremel might not be big enough. Sawzall but be careful not to go too deep. When you get close to the crank shaft stop and try to pry it open.