RunRyder RC
 6  Topic Subscribe
WATCH
 1 page 1003 views
HelicopterEngines Plugs Mufflers Fuel › OS50SX-H dies when removing glow
08-30-2012 06:51 PM  5 years agoPost 1
janfloris

rrNovice

Centurion, Gauteng - South Africa

My Posts: All  Forum  Topic

Hi

I am ready to chuck my OS50SX-H out the window

Let me start at the beginning. I had a crash with the raptor 50 v2 - lost the tail and it slammed to the ground from about 7 feet up. After fixing everything, the OS motor dies instantly when I remove the glow driver. First thing I did was to replace the glow plug (OS plug), but this did not help.

I then went on and removed the engine and stripped it completely. I cleaned the card and needle valve, and replaced the piston ring. (I broke the old one while removing it)
I have the low screw set at half way, and the needle at between 1.5 and 2 turns. It starts 100%, and runs a bit rough (too rich I suppose), but I can actually bring the heli in a hover with the glow driver connected. As soon as I remove the glow, the engine just dies. The fuel I use is also new and fresh 22% nitro heli mix that I few on previously.

Any ideas of what else I can try?

Thank you!

PM  EMAIL  Attn:RR  Quote
08-30-2012 06:55 PM  5 years agoPost 2
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

Are you sure the new glow plug is good? Maybe try a couple of different ones.

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
08-30-2012 07:42 PM  5 years agoPost 3
janfloris

rrNovice

Centurion, Gauteng - South Africa

My Posts: All  Forum  Topic

It glows good when I checked it, but I'll try another one

PM  EMAIL  Attn:RR  Quote
08-30-2012 08:01 PM  5 years agoPost 4
Zaneman007

rrElite Veteran

Texas - USA

My Posts: All  Forum  Topic

An engine that dies after the glow plug is removed is usually a sign of a bad plug. If you replaced with a new plug and it still dies after removing power there is obviously some other issue.

The most common are; the engine could be to rich at idle (how does it transition), a lack of compression, a bad rear bearing, or an air leak.

Did you check the rear bearing when you pulled the engine? This would be my guess.

And why did you pull the ring from the piston? Was there scaring?

Old Guys Rule!

PM  EMAIL  GALLERY  Attn:RR  Quote
09-02-2012 01:42 AM  5 years agoPost 5
wifeorheli

rrElite Veteran

reno, nevada usa

My Posts: All  Forum  Topic

+1 CHANGE PLUG!! coil is worn out!

Novarossi Motors U.S.A
www.PlanetHobby.com
Team Align
GrandRc.com
ZRC U.S.A. "PushGlo, SwitchGlo"

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
09-02-2012 02:06 AM  5 years agoPost 6
TruckRacer

rrNovice

Des Moines, Iowa

My Posts: All  Forum  Topic

Sounds like a classic case of the plug element being plated over by some other metal. This usually happens when something wears inside the engine and the metal particles plate themselves to the plug ... the plug still glows, still looks normal and the engine will run with the battery connected. But because the element's platinum base metal is covered, there is little or no catalytic action between the fuel and the plug so the engine dies as soon as the battery is removed. I'd be looking closely at the bearings or the new ring installation as something in there is going away quickly.

PM  EMAIL  Attn:RR  Quote
09-02-2012 02:37 AM  5 years agoPost 7
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

I think we have to assume it was running just fine till a crash. Although not totally impossible, I don't think the rear bearing went bad and started trashing the plug just because he crashed his Raptor. Now if the heli did the funky chicken and ate a clutch lining and bell (and we weren't told about that), that would be a different story.

I supposed I'd first go through all the plumbing, inside and outside the tank, and I'd make sure the muffler and its bolts were good and tight.

Why did you decide to tear the motor down in the first place?

Next time you want to replace a ring:

http://www.mecoa.com/faq/rings/install/install.htm

It comes off easily if you reverse the procedure, too.

You might as well know that the con rod has a front and back, too, while you're at it. Third picture and accompanying text:

http://www.mecoa.com/faq/conrod/whichway/whichway.htm

Besides finding out that piston rings break easily, what did you see while you had the motor apart?

-----

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-02-2012 02:52 AM  5 years agoPost 8
nappyroots2182

rrElite Veteran

Moline, il

My Posts: All  Forum  Topic

lean that motor out

PM  EMAIL  GALLERY  Attn:RR  Quote
09-02-2012 03:27 AM  5 years agoPost 9
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

+1 ^

True, 22% nitro at somewhere between 1.5 and 2 turns open on the main does sound like it's going to be pretty darn rich.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-02-2012 01:24 PM  5 years agoPost 10
wrongler

rrProfessor

Brewerton, New York

My Posts: All  Forum  Topic

So, Was it the glow plug?

Bill Whittaker

PM  EMAIL  GALLERY  Attn:RR  Quote
09-02-2012 03:46 PM  5 years agoPost 11
dkshema

rrMaster

Cedar Rapids, IA

My Posts: All  Forum  Topic

First thing I did was to replace the glow plug (OS plug), but this did not help.
I think that would have ruled out glow plug as the cause, unless the bearing is plain falling apart (had that happen to me once). It's unlikely the new plug would also be bad.

-----

A question that's not been asked...are you using, or did you use RTV between the muffler and crankcase?

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

PM  EMAIL  GALLERY  Attn:RR  Quote
09-06-2012 12:09 AM  5 years agoPost 12
punkin71

rrApprentice

illinois

My Posts: All  Forum  Topic

My 50 hyper running Byrons YS 20/20 (Hatori sb50hp) runs on the lean side at 1.75 turns if outside temps are in the high 80s- low 90s. At that temp it asks for 1.75 plus 3-4 clicks, and makes good power. In low-mid 70's it isnt happy until set @ 2 turns out or more.

PM  EMAIL  GALLERY  Attn:RR  Quote
09-06-2012 06:09 AM  5 years agoPost 13
janfloris

rrNovice

Centurion, Gauteng - South Africa

My Posts: All  Forum  Topic

Hi guys. I actually got it sorted. Leaning out the engine almost fixed it. It was only after I removed the BRAND NEW plug that I put on and replaced it with an old used one that the engine ran like it should.

Just a pitty I crashed the heli again in the first flight right after the previous rebuild. I lost the tail again. So back to the drawing board to find the cause.

PM  EMAIL  Attn:RR  Quote
WATCH
 1 page 1003 views
HelicopterEngines Plugs Mufflers Fuel › OS50SX-H dies when removing glow
 Print TOPIC  Make Suggestion 

 6  Topic Subscribe

Wednesday, December 13 - 5:27 am - Copyright © 2000-2017 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online