Ul1 motor problem

[G-UNIT]

Took the ul1 out yesterday and everything was going good when it died,
got it back to shore and the motor just seemed to studder and not spin.
remove the prop and shaft and then tryed to turn the motor over and it would not spin. esc working properly, then when i put pressure on the output shaft the motor turned as advertised the just stoped,
Did I blow a bearing?
I did not dissasemble it yet but that seems to be my guess.
any suggestions would be helpfull.

[Fluid]

I wish you'd proof your typing, it is hard to understand what you mean.

How do you know the ESC is working if the motor doesn't work?

What do you mean by "putting pressure on the output shaft"? Throttle on or off? Lateral or radial pressure?

When you disconnect the flex cable dies the motor spin or not? Does it feel gritty or does it just cog?

Has the motor ever gotten wet, really wet?

Please try to be as specific as you can, we aren't there and canot read your mind..


.

[G-UNIT]

seemed stright foward to me but ok.
esc works fine, it arms and rudder works and the motor trys to turn when throttle is pulled
and the motor just seems to studder or as you say cogs untill I push down on the collett then the motor spins properly,
it acts like the motor is not centered in the magnets and won;t turn,
when turning it by hand it does not feel like anything is wrong.
the motor did'ent seem to get really wet and I keep it lubed at the bearing ends

[slyman]

seemed stright foward to me but ok.
esc works fine, it arms and rudder works and the motor trys to turn when throttle is pulled
and the motor just seems to studder or as you say cogs untill I push down on the collett then the motor spins properly,
it acts like the motor is not centered in the magnets and won;t turn,
when turning it by hand it does not feel like anything is wrong.
the motor did'ent seem to get really wet and I keep it lubed at the bearing ends

Check your solder connections from the ESC to the motor, you may have a bad solder joint. Pressing on the motor might move everything enough to complete the circuit.

[HOTWATER]

How many runs do you have on the motor? Did you change anything before that last run (prop)?

[ray schrauwen]

Definately solder connections. Try to move up to a larger connector. I use 5.5mm plugs at the motor.

[G-UNIT]

About 10-15 runs on the motor and nothing different as far as changing props from what I ran before.
went out to check it again, looked at the connection at the motor to esc and they looked ok.
again pushed down and pulled up on the collet while holding the throttle and the motor takes off and spins fine, then you here an clunk and it stops untill I put pressure and hold the collet.
will do more testing and checking tonight.
thank you all for your input, I hope it works out.
How does the black jack motor work out in the UL1? worse case I'll swap them out for the time being.

[dana]

sounds like the motor is toast. bj motor is lower kv, so you will need a prop change if youre gonna use it. i would just buy a new motor.

[G-UNIT]

Yea I think your right, I have some differtent props that worked good on the bj motor, and will tear the ul motor down and perform an autopsy on it.
and will post my findings.
thanks

[longballlumber]

I would make sure you remove the shrink wrap off of the connectors on the motor side. It sure sounds like a connector problem, like most have mentioned. This exact thing has happen to me several times.

Later,
Mike

[G-UNIT]

that will be the first thing i'll check, thanks

[HOTWATER]

Well, if you pull the motor apart...and it looks like this....it's been cooked....

[m4a1usr]

Well, if you pull the motor apart...and it looks like this....it's been cooked....

Now thats a couple of interesting pictures. Hmmmmm,...........the rotor from that aquacraft motor is constructed literaly exactly like the CC/Neu's? Did we just stumble accidently upon some little tid bit of information?

John

[Fluid]

..the rotor from that aquacraft motor is constructed literaly exactly like the CC/Neu's? Did we just stumble accidently upon some little tid bit of information?

Very doubtful. It looks almost exactly like my Feigao and Hacker rotors, which predate the Neu and CC motors. These BL motors are very simple and there are only so many ways to make them.....




.

[G-UNIT]

Well what can I say except that you guys ROCK!!!!!!.
got home last night and the first thing I did was hook up the UL1 and pulled the throttle and it did the same thing just studdered / coged, so I grabed the wires on the motor and hit the juce again and the motor spun great.
Bad connection on the motor wires.
put on some 5mm bullets and benched tested and everything worked great.
at first I was worried becaused all I got was a constant beeping, but after changing the wires around It worked great.
So my day yesterday was not as bad as it started and I learned somthing new, again thank you all for your input, this is what I like so much about this fourm.
again you guys ROCK !!!!!!!!!!