I have looked for a good lawnmower service shop several times. I had one, but got the feeling I was being over charged and asked at Rodelag where they would recommend. They directed me to Multiservicios Díaz, which is close to Rodelag.
I have used them now for two items and I like the people that run it. They are nice friendly people and my equipment came back running well. Here is a Google Map. Their number is on the photo. If you stop in, tell them that you learned about them on Chiriquí Chatter.