Why is my MJ1200 with SureFlow mod doing this?

Delphinus · #1 05-25-2009, 05:18 PM

Clearly, she's plugged it in upsidedown. I'll refrain some making any blonde references now.

mike31154 · #2 05-25-2009, 05:23 PM

That's it, her stunning good looks are making the electrons run backwards.

Myka · #3 05-26-2009, 04:26 AM

Well, it was freakin difficult to get that propeller off the shaft and turn it around, so I'm assuming that no one took it off and put it back on backwards, so that makes me think that the propeller is spinning in the opposite way that is was intended. If you look at the propeller from the front it is spinning counter-clockwise. It spins the same way every time I plug it in.

Oh, and the frickin thing is going to be banned to salt mixing as soon as I find a replacement. It is obnoxiously loud. Grr.

fkshiu · #4 05-26-2009, 05:18 AM

Quote:

Originally Posted by Myka

Well, it was freakin difficult to get that propeller off the shaft and turn it around, so I'm assuming that no one took it off and put it back on backwards, so that makes me think that the propeller is spinning in the opposite way that is was intended. If you look at the propeller from the front it is spinning counter-clockwise. It spins the same way every time I plug it in.

Oh, and the frickin thing is going to be banned to salt mixing as soon as I find a replacement. It is obnoxiously loud. Grr.

The flat side of the propellor should be in front.

If it is facing correctly, then you should try shaving the propellor down a bit with a dremel tool to make it smaller.

Myka · #5 05-26-2009, 05:25 AM

Oops, I forgot to mention that it is pushing water out, not sucking it in. It has never made the water go backwards. The tabs get in the way, and don't allow the prop to spin that way.

fkshiu: I'm not sure what you mean about the flat side in front? Do you mean the flatter edge of each petal should be leading the spin, not following?

The guy I bought it off is sending me the black propeller, so hopefully that one will work better.

fkshiu · #6 05-26-2009, 05:31 AM

Quote:

Originally Posted by Myka

Oops, I forgot to mention that it is pushing water out, not sucking it in. It has never made the water go backwards. The tabs get in the way, and don't allow the prop to spin that way.

fkshiu: I'm not sure what you mean about the flat side in front? Do you mean the flatter edge of each petal should be leading the spin, not following?

The guy I bought it off is sending me the black propeller, so hopefully that one will work better.

Go back to page 1 of this thread and look at Mike31154's pictures. The top picture shows the correction propellor orientation.

If you put the black one in a Maxijet 900 it should definitely work better although you won't get quite as much flow.

Myka · #7 05-26-2009, 05:51 AM

I will check the prop orientation tomorrow when the lights are on. I would rather have less flow than all this noise. I just need to get by for a couple months or so. Good thing I have LPS, not SPS!

mike31154 · #8 05-26-2009, 03:45 PM

Quote:

Originally Posted by Myka

Well, it was freakin difficult to get that propeller off the shaft and turn it around, so I'm assuming that no one took it off and put it back on backwards, so that makes me think that the propeller is spinning in the opposite way that is was intended. If you look at the propeller from the front it is spinning counter-clockwise. It spins the same way every time I plug it in.

Oh, and the frickin thing is going to be banned to salt mixing as soon as I find a replacement. It is obnoxiously loud. Grr.

OK Myka, going by your current description, it's working as intended, pushing the water through the front of the cage. Looking at the spare hobby propeller I have in front of me, if it's built the same way as yours, counter-clockwise is the way you want it to spin since that will push the water which is what you want. I'm not sure what makes you think this is the opposite way as intended. How about taking a quick close up photo of the shaft & prop to show us what it's looking like?

Myka · #9 05-26-2009, 04:13 PM

I think it's going the opposite way it's supposed to because when I have the propeller fitted the proper way it hits the tab which is apparently intended to stop it and make it go the other way.

Here it is now:

This pic I'm hoping you can see the tab I'm talking about on the left side of the inside. You're looking at the end the water flows out of.

Tom R · #10 05-26-2009, 04:30 PM

I could not stop the larger propeller from going the wrong way. I tried inserting washers to take up the slack I finally glued it and even the it would go the wrong way. I finally switched to the smaller propeller and it has worked ever since. It must be something to do with the torque on the large propeller and the wear and tear on an older MJ1200. Have you tried a new MJ1200 to see if that works. I believe MJ1200 will run in either direction. I have just turned the plug to reverse the flow however after a period of time the pump will reverse direction again.

I would not buy another one of these mod kits. I contacted the maker and they sent me all new parts in an effort to get it going.

Tom R