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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › YS 50ST Problem, won't run with out glow driver attached.
04-01-2012 06:40 AM  7 years ago
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jimm

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Dixon, IL

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YS 50ST Problem, won't run with out glow driver attached.
I was having a problem today with a brand new YS 50ST, never been run before.

I was trying to get it running today for the first time. It initialy started and ran with no problems and after a few moments it quit on me.

Subsequent starts had it quiting as soon as I pulled the glow driver off. As it seemed like it was suffering from an overly rich conditions I proceeded to slowly lean it out on the low end needle with no luck. Trying the high end needle showed no improvement either. It seemed like no matter what I did it would just not run once the battery was removed. I did go back to factory starting points on the needles but it just won't run. The check valve is mounted in the correct direction.

I tried new plugs (Enya #3), new fuel (Wildcat 30% Heli as well as new Byron 30%).

It would start just fine but just not run once the battery was removed. It is mounted in a Frenzy 50.

Does anyone have any idea as to what I am doing wrong? I am at my wits end. I am about ready to yank it out and put a OS in it.

HELP.....

Thanks,

Jim
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04-01-2012 07:07 AM  7 years ago
rexxigpilot

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You may have a blockage in the regulator. It is not uncommon with the YS50. If it is new, send it back for replacement. If you had it long enough that you can't return it, clean the regulator. Be careful disassembling it.
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04-01-2012 01:37 PM  7 years ago
airdodger

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Johnston USA

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Did you use a sealant on the exhaust? I have also had new plugs that were no good.Chris
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04-01-2012 04:02 PM  7 years ago
jimm

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Yes I did use sealant on the exhaust.
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04-01-2012 04:06 PM  7 years ago
wifeorheli

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sounds like either a plug problem(wont stay hot without igniter) or the check valve is sticking. blow threw the valve it should make sorta a click then open and move airNovarossi Motors U.S.A
www.PLanethobby.com
Team GrandRc.com
Team Byron Fuels
ZRC U.S.A. "PushGlo, SwitchGlo"
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04-01-2012 09:43 PM  7 years ago
ch-47c

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san jose, ca

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I have two YS50STs that run great. I quit using sealant on the exhaust and now make gaskets out of cardboard from an old binder about 1/16th thick. Seems to occassionally ruin a glo plugs element. Some sort of chemistry. I start a new 50ST with the IDLE screw at 1+1/8th turn and HIGH needle at 2+1/4. Fires up right away. When you pull the igniter off and it dies, it maybe a little rich as the ignitor keeps it hot and burns more thoroughly. YS engines don't like lean runs at all and make plenty of power when run a little rich. I had a YS 91SR that needed to run with the ignitor on a little bit when new until the engine run-in about a tank. Easier after the first tank. Just hover it with the ignitor on for a while. Change plugs after break-in. My YS seem to like OS#8s. I tried ENYA #3s and they just didn't work for me. I've had 6 YS engines and never had a regulator fault. Just my experience.
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04-02-2012 12:12 AM  7 years ago
jimm

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Dixon, IL

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I tried blowing through the check valve and I could not get any air to blow through it at all. I tried blowing through the check valve on my other YS 50St and at first it did not work than it popped open and air would go through along with a bit of fuel that was in it. I tried blowing through the one I was having problems with again and with a lot more force it finally popped open and air and some fuel went through it.

Do you think that might be all that was wrong with it?

I hope to try running it again sometime this week.
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04-02-2012 03:38 AM  7 years ago
wifeorheli

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take the check valve apart and clean with denatured alcohol. BE VERY carefull when taking apart there is a clear piece of plastic by the spring DONT lose it you will never find it if it falls on the floor lol. reassemble then run it or just buy a new one there cheapNovarossi Motors U.S.A
www.PLanethobby.com
Team GrandRc.com
Team Byron Fuels
ZRC U.S.A. "PushGlo, SwitchGlo"
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04-02-2012 10:55 AM  7 years ago
airdodger

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Johnston USA

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If you used rtv that can ruin the plug.Chris
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04-02-2012 11:16 AM  7 years ago
Helipilot01

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ColliervilleTn

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Definately sounds like your mixture needles are out of balance. I believe my hi speed needle is around 1 5/8 turns open for a broke in engine. I'm not sure where the low speed is at but it is leaner than the factory setting. I'm using Enya#3 and they last hundreds of flights. I've used Enya plugs for over 20 years and found them to be bullet proof.
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04-02-2012 11:26 AM  7 years ago
Helipilot01

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Oh yea, one other thing...I'm also using RTV to seal the muffler to the engine crankcase. There is an excellent article on the Heliproz site about mufflers and part of it covers how to prepare the engine and muffler to use RTV. The secret is to use only a very small amount of RTV. The article calls it just a smear. If you pile the RTV on thinking that more is better, small pieces will break off and find their way to the glow plug element and the engine will stop immediately!! Here's the link http://www.heliproz.com/mufflergunk.asp
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04-07-2012 03:18 AM  7 years ago
Zaneman007

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Texas - USA

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Ditch the RTV. It doesn't do anything. The muffler will seal without it.

All it will do is cause issues, as you have found out.
Old Guys Rule!
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04-08-2012 12:34 AM  7 years ago
Agilefalcon

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Fort Worth, Texas

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RTV residue will instantly kill the catalytic reaction of the plug.Chris Berardi
Team BobbyJack's Hobbies
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04-14-2012 06:45 PM  7 years ago
corvettercr

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erick oklahoma usa

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change the plug to the o.s. #8
just apply a very small ammoung of hitemp rtv. the orange stuff.
take the check valve apart and un stick the silicone disc. those get stuck sometimes. then reset the needles to factory. it should start then. i use rtv on everything but in very small ammounts. works great. i have ys in every heli i own. aweson=me engines.
synergy n9, trex 250,450,600,700
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04-14-2012 06:57 PM  7 years ago
rexxigpilot

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Ditch the RTV. It doesn't do anything. The muffler will seal without it.

All it will do is cause issues, as you have found out.
+1
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04-14-2012 07:00 PM  7 years ago
rexxigpilot

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rexxig2@comcast.net

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If you feel the need to use some sealant for the muffler connection instead of a gasket, try a smear of epoxy. It won't destroy glow plugs like RTV does.

It's been over a week since the OP last posted. I wonder if he is still having issues keeping the YS50ST running. What do you say OP?
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04-15-2012 02:33 AM  7 years ago
corvettercr

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erick oklahoma usa

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Epoxy melts ya know. Especallyon exaustand is not oil resistant. .othi.g else use a gaskit. But be aware they may blow or bolts back out during flight. Talk to all the giant scale guys guys and they chunk the gaskets and use rtvsynergy n9, trex 250,450,600,700
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04-15-2012 02:43 AM  7 years ago
airdodger

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Johnston USA

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Used epoxy for years and never had a problem, rtv is nothing but a problem. The engines in giant scale are usually using spark plugs not glow plugs.Chris
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04-15-2012 05:21 AM  7 years ago
jimm

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Dixon, IL

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I have been on travel a lot for work this past month and have not had a chance to do anything with it yet. Hope to have a chance to do something with it soon.

I appreciate everyone's inputs. Thanks.
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07-30-2012 01:26 PM  7 years ago
jimm

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Dixon, IL

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Well I finally had a chance to get out this weekend and try to get this thing started again. I cleaned everything and even swapped out the check valve from my other YS 50 and still can't get the engine to run. When I reinstalled the muffler, I used no sealant at all. Rechecked the needles. I put in an email to YS to see what they suggest, guessing I am going to have to send it in and have them look at it.....
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HomeRC & Power✈️Aircraft🚁HelicopterEngines Plugs Mufflers Fuel › YS 50ST Problem, won't run with out glow driver attached.
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