I have an old Genie Excelerator door opener with a screwdriver. It would open about a foot and then get stuck and stop. The original part that was replaced had broken teeth and was jammed in the screw drive. This has continued and is working as it should. Installation took about 10 minutes. With the door closed and the lever pulled to release the original part, I had to loosen the two screws at the end of the screwdriver on the garage door and pull the cotter pin out of the original part to unhook the linkage to the garage. Freed, I just took the old one off. Then I installed a new one and tightened the screws. I inserted the pin that attached the linkage to the door, installed the linkage, moved the lever up to the latch position and tested it. Worked great.
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