Selling a Chamberlain 1/2 Horsepower chain drive opener, model 41A5021-1S. Does not include the chain, rail, brackets or safety sensors. Works perfectly.
This was installed in my garage and failed, so I bought a new unit to use while I determined whether I could fix this one. I found that the nylon gear inside was stripped and replaced it. I cleaned, lubricated, and checked the unit out after I replaced the gear and it works perfectly on the bench.
I'm only hoping to get back what I have spent for parts to fix it - $50 OBO