Need Help: OS61 LX engine probs (in Vario Kobold)

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by RC-Helima » Sun, 18 Mar 2001 19:46:03



Some os motors have indeed this problem. Try silicon tube over the needle
house.

Martin


Quote:
> I would look for an air leak around the carb somewhere. I am not familiar
> with these motors but the symptoms sound like something is loose in the
carb
> region and air is leaking past it into the motor making the mixture vary.

> --

> Peter Wales in Sunny Orlando

> http://www.FoundCollection.com/



> > I hope someone can offer some advice.  I'm pulling my hair out
> > trying to get this engine up and running at a reliably consistent
> > idle.

> > This is the LX version of the OS61 engine.  It has a high range
> > valve setting and a low range idle***setting.  No mid range setting.

> > Symptoms:

> > At factory settings, the idling is really bad.  I have to open the
> > throttle so much that the clutch engages.  Lowering the throttle,
> > the engine dies.

> > The only way I'm getting this engine to idle somewhat reasonably is
> > to richen the idle mixture out about 1/4 to 1/2 turn.  The engine
> > will idle somewhat OK at this setting, but what happens is that it
> > will start revving up and down (as though it's getting intermittently
> > leaned out).   It seems to increasingly lean while running and if I try
> > lowering the throttle trim it dies.   When I pull the glow plug out
> > at this idle setting, the engine RPM drops a bit which I think indicates
> > it's too rich, but if I lean the idle mixture it just gets worse than
> > factory setting.  Another thing is that when I do have it idling,
> > it seems to be very sensitive to movement -- RPMs fluctuate when I
> > lift the heli up to set it down somewhere else.   Bottom line: best I
> > can seem to do is keep it idling for a minute or 2 before it ends up
> > dying.

> > Debugging:

> > There really seems to be some kind of fuel flow problem somewhere.
> > I've checked the lines for leaks, removed filters, checked tank and
> > clunk line.   I'm using CoolPower 15%.  This stuff runs just great
> > in my Raptor with OS32X engine.   I've pretty much run out of things
> > to try.   Could it be something in the pipe?

> > Also, this is the second LX engine I've tried in it.  The first had
> > similar problems, but I did have it running much better with a
> > richened idle mix.   So, I really think it's not an engine problem
> > but something in the fuel setup or something else.

> > Anyone think of something else to try?  I'm pretty much out of ideas.

 
 
 

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by RC-Helima » Sun, 18 Mar 2001 19:46:58


Some os motors have indeed this problem. Try silicon tube over the needle
house.

Martin



Quote:
> I would look for an air leak around the carb somewhere. I am not familiar
> with these motors but the symptoms sound like something is loose in the
carb
> region and air is leaking past it into the motor making the mixture vary.

> --

> Peter Wales in Sunny Orlando

> http://www.FoundCollection.com/



> > I hope someone can offer some advice.  I'm pulling my hair out
> > trying to get this engine up and running at a reliably consistent
> > idle.

> > This is the LX version of the OS61 engine.  It has a high range
> > valve setting and a low range idle***setting.  No mid range setting.

> > Symptoms:

> > At factory settings, the idling is really bad.  I have to open the
> > throttle so much that the clutch engages.  Lowering the throttle,
> > the engine dies.

> > The only way I'm getting this engine to idle somewhat reasonably is
> > to richen the idle mixture out about 1/4 to 1/2 turn.  The engine
> > will idle somewhat OK at this setting, but what happens is that it
> > will start revving up and down (as though it's getting intermittently
> > leaned out).   It seems to increasingly lean while running and if I try
> > lowering the throttle trim it dies.   When I pull the glow plug out
> > at this idle setting, the engine RPM drops a bit which I think indicates
> > it's too rich, but if I lean the idle mixture it just gets worse than
> > factory setting.  Another thing is that when I do have it idling,
> > it seems to be very sensitive to movement -- RPMs fluctuate when I
> > lift the heli up to set it down somewhere else.   Bottom line: best I
> > can seem to do is keep it idling for a minute or 2 before it ends up
> > dying.

> > Debugging:

> > There really seems to be some kind of fuel flow problem somewhere.
> > I've checked the lines for leaks, removed filters, checked tank and
> > clunk line.   I'm using CoolPower 15%.  This stuff runs just great
> > in my Raptor with OS32X engine.   I've pretty much run out of things
> > to try.   Could it be something in the pipe?

> > Also, this is the second LX engine I've tried in it.  The first had
> > similar problems, but I did have it running much better with a
> > richened idle mix.   So, I really think it's not an engine problem
> > but something in the fuel setup or something else.

> > Anyone think of something else to try?  I'm pretty much out of ideas.


 
 
 

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by Pete » Sat, 17 Mar 2001 23:13:57


I would look for an air leak around the carb somewhere. I am not familiar
with these motors but the symptoms sound like something is loose in the carb
region and air is leaking past it into the motor making the mixture vary.

--

Peter Wales in Sunny Orlando

http://www.FoundCollection.com/


Quote:
> I hope someone can offer some advice.  I'm pulling my hair out
> trying to get this engine up and running at a reliably consistent
> idle.

> This is the LX version of the OS61 engine.  It has a high range
> valve setting and a low range idle***setting.  No mid range setting.

> Symptoms:

> At factory settings, the idling is really bad.  I have to open the
> throttle so much that the clutch engages.  Lowering the throttle,
> the engine dies.

> The only way I'm getting this engine to idle somewhat reasonably is
> to richen the idle mixture out about 1/4 to 1/2 turn.  The engine
> will idle somewhat OK at this setting, but what happens is that it
> will start revving up and down (as though it's getting intermittently
> leaned out).   It seems to increasingly lean while running and if I try
> lowering the throttle trim it dies.   When I pull the glow plug out
> at this idle setting, the engine RPM drops a bit which I think indicates
> it's too rich, but if I lean the idle mixture it just gets worse than
> factory setting.  Another thing is that when I do have it idling,
> it seems to be very sensitive to movement -- RPMs fluctuate when I
> lift the heli up to set it down somewhere else.   Bottom line: best I
> can seem to do is keep it idling for a minute or 2 before it ends up
> dying.

> Debugging:

> There really seems to be some kind of fuel flow problem somewhere.
> I've checked the lines for leaks, removed filters, checked tank and
> clunk line.   I'm using CoolPower 15%.  This stuff runs just great
> in my Raptor with OS32X engine.   I've pretty much run out of things
> to try.   Could it be something in the pipe?

> Also, this is the second LX engine I've tried in it.  The first had
> similar problems, but I did have it running much better with a
> richened idle mix.   So, I really think it's not an engine problem
> but something in the fuel setup or something else.

> Anyone think of something else to try?  I'm pretty much out of ideas.

 
 
 

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by Ed Goldm » Sat, 17 Mar 2001 22:46:09


I hope someone can offer some advice.  I'm pulling my hair out
trying to get this engine up and running at a reliably consistent
idle.

This is the LX version of the OS61 engine.  It has a high range
valve setting and a low range idle***setting.  No mid range setting.

Symptoms:

At factory settings, the idling is really bad.  I have to open the
throttle so much that the clutch engages.  Lowering the throttle,
the engine dies.

The only way I'm getting this engine to idle somewhat reasonably is
to richen the idle mixture out about 1/4 to 1/2 turn.  The engine
will idle somewhat OK at this setting, but what happens is that it
will start revving up and down (as though it's getting intermittently
leaned out).   It seems to increasingly lean while running and if I try
lowering the throttle trim it dies.   When I pull the glow plug out
at this idle setting, the engine RPM drops a bit which I think indicates
it's too rich, but if I lean the idle mixture it just gets worse than
factory setting.  Another thing is that when I do have it idling,
it seems to be very sensitive to movement -- RPMs fluctuate when I
lift the heli up to set it down somewhere else.   Bottom line: best I
can seem to do is keep it idling for a minute or 2 before it ends up
dying.

Debugging:

There really seems to be some kind of fuel flow problem somewhere.
I've checked the lines for leaks, removed filters, checked tank and
clunk line.   I'm using CoolPower 15%.  This stuff runs just great
in my Raptor with OS32X engine.   I've pretty much run out of things
to try.   Could it be something in the pipe?

Also, this is the second LX engine I've tried in it.  The first had
similar problems, but I did have it running much better with a
richened idle mix.   So, I really think it's not an engine problem
but something in the fuel setup or something else.

Anyone think of something else to try?  I'm pretty much out of ideas.

 
 
 

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by Ed Goldm » Tue, 20 Mar 2001 04:27:58


Quote:

>Some os motors have indeed this problem. Try silicon tube over the needle
>house.

Thanks I'll give it a try.  It's the second LX motor I've tried and
both seem to have the same problem.   I assumed the problem lay elsewhere
in my setup.   Couldn't find any problems elsewhere and really seems
like air is leaking in somewhere.

Perhaps I should dump the LX carb and replace it with a 3 needle SX WC
carb?   Anyone know of inherent probs with the LX carb?

-edg-

 
 
 

Need Help: OS61 LX engine probs (in Vario Kobold)

Post by Ed Goldm » Tue, 20 Mar 2001 08:54:04


Quote:

>Some os motors have indeed this problem. Try silicon tube over the needle
>house.

>Martin

Welp.  Tried it today and still no joy.

-edg-