Originally Posted by John S.
Is it possible that a 1/2 mm smaller connector can make you lose about 500 watts ?
Could have been a colder solder joint or a defective connector. I had a motor that ran great for years. Started to run erratic and hot. Traced it to a cold solder joint. Don't know how it could have "just turned" into a cold solder joint, but found it by the wiggle test, and hit the joint with a hot soldering iron. Motor runs great once again.