mj mod builders - UPDATE

[Texreefer]

ok i bought 4 of these things from www.mjmods.com for my 900's.. i thought it would be simple to put together.. HA! i got one to work and for the life of me i have tried every combination under the sun to try and get another one running and they just won't work they simply won't spin the right way. i have tried moving the stops making the props longer/shorter. turning prop around and every combination there you can think of and nothing.anyone have any ideas? i hate to think i wasted all that money :angry

[cbianco]

Free Bump!

I would like to know why it is spinning the wrong way. I was under the impression that the impeller could only spin one way in the pump.

Christopher

[SA-DSM]

If you look here for the video that shows how to make the mjmods he talks about it spinning backwards. He says that there is a way to fix it. Or you can ask louis at aquatic warehouse. He makes them.

http://www.reefvideos.com/

[jroescher]

There's nothing to keep the pump from starting in one direction. Because it's an impellor, it doesn't matter. It will pump water regardless of which direction the impeller is spinning. When you change it to use a propeller, then you have to force it to start in only one direction.

You need to put a small pin or something just in front of the propellor. Position it so that when the pump starts the wrong direction the propeller will move forward and strike the pin. When you assembled the pump, the propellor should have a small amount of free travel in and out of the motor. When it stops, the pump will restart in the opposite direction.

Mine makes a rattling noise until it starts right. About 1 second. But only when it starts in the wrong direction.

[Texreefer]

i have done all of that in about 80 different ways and still can't get it to work

[josephatmbimortgage]

That sucks man....I was thinking about that a while back for my Mj 1200 but backed out to get tunze powerheads. Hopefully it'll work soon bc you spent money on a producty giving you hell. Good luck man,
Joseph

[Texreefer]

ok, so check this out.. the one that actually works.. i took it apart and copied it EXACTLY to build another one.. still doesnt work.. i wonder what a garbage disposal will do to a bunch of useless plastic parts :)

[jc]

Keep at it and you will it to work. Mine would constantly get stuck when it wanted to reverse flow. What I did was shave the propeller down a bit to reduce the flow. Since then I got the flow I wanted and the propeller has yet to stick or reverse flow.

[Louis]

Texreefer, bring the mods and pumps to the shop. I'm pretty sure we can figure it out :)

Louis

[Texreefer]

thanks louis , i will do that

[Texreefer]

ok,, i re-traced all me steps and logic said that the way its built it should work.. so what else could be wrong besides the way i built it? i had a thought, i took a pair of scissors and a dremel and cut about a 1/4" off the prop and rounded and sharpened the edges..... works like a charm... starts up every time :D

they sent me props that were too big so i am having them send me the correct ones

[Texreefer]

and now i am going to have to move some softies because of too much flow... these things pack a pretty good punch