So I was doing a little maintenance on the tank today and decided to remove the wet side assembly's of my MP20's and clean off the algae and gunk that were building up on the propellers and intake screens. I let them soak in some hot water and vinegar, scrubbed them with a tooth brush, rinsed them and put them back in the tank. They started up and then began to squeak and the props would stop and start-stop and start.
So I took the wet side back out and found that the magnets are scraping on the cover over the back of the wet-side assembly. The coating on the magnets is worn off in a section and the cover is all scraped up. What gives? They worked fine before I took them out. I have no idea what changed. I made no adjustments to the drive shaft nut and I know the wear was not there beforehand because I had looked at the magnets before I cleaned up up the wet-sides.
I've thought of every possible thing that could have affected them and all i can come up with is that the back sides of the wet-sides stuck together in the bucket I soaked them in and that buck was sitting in a steel sink. Not sure if that could be the cause of making things go wrong, but I'm at a total loss as to what could cause this.
So I took the wet side back out and found that the magnets are scraping on the cover over the back of the wet-side assembly. The coating on the magnets is worn off in a section and the cover is all scraped up. What gives? They worked fine before I took them out. I have no idea what changed. I made no adjustments to the drive shaft nut and I know the wear was not there beforehand because I had looked at the magnets before I cleaned up up the wet-sides.
I've thought of every possible thing that could have affected them and all i can come up with is that the back sides of the wet-sides stuck together in the bucket I soaked them in and that buck was sitting in a steel sink. Not sure if that could be the cause of making things go wrong, but I'm at a total loss as to what could cause this.