hi guys need some help .trying to remove my impeller .i beleive i have the threaded type as the impeller and nut is all one piece..problem is even useing my legs on a big wrench it wont break free im probl;ey running risk of bending my shaft ...any secrets on removing these should i be looking for a deep socket and impact gun?? my manual says its a reverse nut counter clockwise to remove..should i use heat ?? any help or advise would be great thanks in advane i have a 94 sportjet 90