Mp40 issues

phil bevilacqua · Mar 15, 2021

My MP 40 will just make a hopping or clacking sound and then fall off. Had them a long time no issues. I cleaned the west side and didn’t see any issues or problems with it and put it back on and it did the same thing about a week or two later. Any ideas??? Thanks

stacksoner · Mar 15, 2021

Improper spacer usage

stacksoner · Mar 15, 2021

Ecotech Marine MP40 Spacers

Ecotech Marine MP40 Thick and Thin Spacers

www.aquariumspecialty.com

ca1ore · Mar 15, 2021

How long is a long time? The wetside does wear out ..... perhaps it’s time for a new one. I typically get about 5 years out of mine.

phil bevilacqua · Mar 15, 2021

ca1ore said:
How long is a long time? The wetside does wear out ..... perhaps it’s time for a new one. I typically get about 5 years out of mine.

2.5 years

phil bevilacqua · Mar 15, 2021

slewrock1 said:
Ecotech Marine MP40 Spacers

Ecotech Marine MP40 Thick and Thin Spacers

www.aquariumspecialty.com

Been fine for 2.5 years

ca1ore · Mar 15, 2021

phil bevilacqua said:
2.5 years

Hmmn, not that old. Stillmay be a bad wetside.

phil bevilacqua · Mar 17, 2021

ca1ore said:
Hmmn, not that old. Stillmay be a bad wetside.

Even if when I clean it , it spins freely?

ca1ore · Mar 17, 2021

I had the same problem with a MP10. Wetside 'appeared' to be fine, yet it kept falling off. Got a new one and it's been fine. My guess is that wear causes some slight imbalance that is not immediately apparent by hand but enough to dislodge the wetside when powered.

phil bevilacqua · Mar 17, 2021

I hear ya. I would match ur last one.
But I don’t need the money and they do a pretty good job of holding their value because they’re the best.
I would even do 300 in my pocket and then you pay the shipping which is probably gonna be 20 bucks I guess I would show you receipt at time I ship ..

phil bevilacqua · Mar 17, 2021

Wrong thread. Lol

ScottB · Mar 17, 2021

When you cleaned it, you took apart the wet side fully, right? Unclipping the magnet housing and cleaning inside the wetside, right? I will go head and admit that I ran these for years before thinking to unclip and clean until I had one behaving as you describe.

phil bevilacqua · Mar 17, 2021

ScottB said:
When you cleaned it, you took apart the wet side fully, right? Unclipping the magnet housing and cleaning inside the wetside, right? I will go head and admit that I ran these for years before thinking to unclip and clean until I had one behaving as you describe.

Yes I did

ZachP · Mar 17, 2021

So I’ve had this happen a couple times with my slave mp40. Every now and then when I take it out of feed mode it’ll have trouble connecting to the master. When that happens sometimes it does a weird thing where the fan will just spin kind of jerky and weird and make it shake. Then as soon as it connects it’s fine and goes back to normal

ZachP · Mar 17, 2021

Also this is with a brand new MP40 with no issues. And it only happens when it’s a slave to the master pump.

Cwentz758 · Mar 17, 2021

ZachP said:
So I’ve had this happen a couple times with my slave mp40. Every now and then when I take it out of feed mode it’ll have trouble connecting to the master. When that happens sometimes it does a weird thing where the fan will just spin kind of jerky and weird and make it shake. Then as soon as it connects it’s fine and goes back to normal

Currently having this issue. Is it the not using the spacer? I feel using the spacer makes the magnet weaker.

ZachP · Mar 17, 2021

I believe mine has the smallest spacer, can’t remember for sure though. I just measured the glass and did whatever spacer was recommended

Cwentz758 · Mar 17, 2021

It did this to me the other day just randomly

timry2 · Mar 9, 2023

Have you used the thinner spacer? If you are using the thinnest, you might have to go with no spacer. My MP 10 did that on a 1/4 thick tank. I run with no spacers