RunRyder RC
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 576 views POST REPLY
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › OS105HZR Quits on spool up
12-31-2018 03:37 AM  10 months ago
Topic Vote0Post 1
lajwab

rrApprentice

Chicago, ILL

MyPosts All Forum Topic
OS105HZR Quits on spool up
Hi Guys,

I got a Trex700N dfc running an OS 105HZR / Power Boost. Vbar Neo with Futaba 16SZ radio. I'm running a 30% Optifuel using Vbar Neo Governor.

My last flight had an issue with bad Clutch Shoe It weared out and I can see liner particles all over the place. I've replaced liner with bell plus a new clutch shoe.

The problem is with the same needle settings, the motor would quit every time while I spool up. It only runs for 10 seconds every time i try. I've tried everything but NO luck.
Tank Pressure is OK, Pressure Valve is in correct direction, New Glow Plug, Needles are at Factory 2 turns out.
NO problem in starting. It fires right up. But it will quit after 10 seconds no matter what i do.

I have cleaned the Regulator before I had the clutch shoe issue.
Please advise what to look into.

Regards,

Arshad
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 03:20 PM  10 months ago
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

MyPosts All Forum Topic
Look for air leak in lines . You have checked most everything .
Does it die on transition from idle or sitting at idle dies ?
I stole it ,flew it and gave it back ;)
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 03:56 PM  10 months ago
lajwab

rrApprentice

Chicago, ILL

MyPosts All Forum Topic
I can bring it to hover within 10seconds but then it quit. I have tried different needle settings but no luck. Is it possible to check the regulator without taking apart ?.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 04:59 PM  10 months ago
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

MyPosts All Forum Topic
Does it sound like it’s leaning out or it just dies ? The transition (low to mid )is too rich will make it die . Also if it’s not sounding lean maybe disconnect your governor sensor just to make sure it’s not pulling your throttle back .I stole it ,flew it and gave it back ;)
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 05:07 PM  10 months ago
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

MyPosts All Forum Topic
Open mid more and try , then close mid to see if it helps . When idling pull fuel line off carb and see how long it runs and see if fuel flows from line . If motor runs for extended time low is rich if motor revs high before stopping too lean . Should increase a little and stop about 2 seconds .I stole it ,flew it and gave it back ;)
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 07:03 PM  10 months ago
RappyTappy

rrProfessor

Encinitas, CA

MyPosts All Forum Topic
Manual states high speed needle at 2 to 2 1/2 turns from closed and mid speed needle set at 1 to 1 1/2 turns from closed, these are rich settings.

Sounds like you can't get out of the idle mixture. When it does run, if you pinch the line it should run for 2 seconds normally after fuel cut off then increase rpm and hold that and then slow down and stop.

If it starts to die straight away and doesn't have a rpm rise, then it's too lean.

If it takes far longer than 2 seconds then it's too rich, this is the idle mixture.

If you can get it to have the 2 second run and rpm rise after pinching off the fuel line, but still can't transition the motor or it dies on it's own unexpectedly, then there is either a air leak dirt or something wrong with the regulator.

Also, maybe a consideration could be adding a shim(s) to the head of the engine. If the compression is too tight for your conditions(fuel, muffler, altitude ECT), lessening engine compression can be the solution.

Good luck. :Cool:
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 07:19 PM  10 months ago
halfcab

rrNovice

SC

MyPosts All Forum Topic
Kinda been there once OS105, only after a HOT START that eat up the clutch lining with dust and fiber parts all over. Afterwards Engine would start for few seconds then die.

Engine/carb had sucked in clutch lining that broke the older style OS piston ring grove “Pin”.

Hope this is not your proublem.
SHARE  PM  EMAIL  Attn:RR  Quote
12-31-2018 07:33 PM  10 months ago
Rojoalfa

rrVeteran

Punta de Mata, Monagas-Venezuela

MyPosts All Forum Topic
/
/

Don't touch the regulator.

You better check motor and do a deep clean up.

Check your silicon tubing... Some loss of pressure may occurred suddenly...

/
Saludos cordiales,
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 09:58 PM  10 months ago
don s

rrElite Veteran

Chesapeake, VA

MyPosts All Forum Topic
Sounds like it's not drawing fuel beyond the prime...E820, Raptor G4N, X50F/E, E620, Forza 450, and some planks.
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 10:25 PM  10 months ago
dialarotor

rrElite Veteran

Traverse City, Michigan

MyPosts All Forum Topic
💎Sustaining Member
Bigger fuel line
It’s a big motor, sucks lots of fuel. If using just regular fuel tubing it will go lean as carb opens
RapRexSynLogo Pilot
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
12-31-2018 10:41 PM  10 months ago
Jeff polisena

rrElite Veteran

westpalmbeachflorida usa

MyPosts All Forum Topic
Medium line is sufficient , works fine on mine .I stole it ,flew it and gave it back ;)
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-01-2019 12:20 AM  10 months ago
balsapro

rrVeteran

Gallatin,TN

MyPosts All Forum Topic
Check the needle valve assembly... It holds the regulator onto the carb body. It may be loose/ sucking air. Mine has a gasket on both sides of the regulator mount.Build the Best, Fly the Best, Crash the Best
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
01-01-2019 12:29 AM  10 months ago
wjvail

rrElite Veteran

Meridian, Mississippi

MyPosts All Forum Topic
💎Sustaining Member
Is it possible your fuel is wet? Fuel that has absorbed too much moisture will exhibit the behavior you are describing. Can you borrow a tank a fuel from someone with known good fuel? The beginning of any engine trouble shooting includes a fresh plug and good fuel."Well, nothing bad can happen now."
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
01-01-2019 02:36 AM  10 months ago
jbiter

rrKey Veteran

Sebring, FL

MyPosts All Forum Topic
Did you use RTV when you mounted the pipe? If RTV gets loose in the combustion chamber it will cause this....

Jeff
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-15-2019 01:14 AM  4 months ago
dialarotor

rrElite Veteran

Traverse City, Michigan

MyPosts All Forum Topic
💎Sustaining Member
make sure fuel lines are larger than the ones you use on a .55 or .90, Much larger engine and fuel line needs to be larger or motor goes lean and quits right off, can't open needle enough to get fuel to motor.RapRexSynLogo Pilot
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-17-2019 12:14 AM  4 months ago
Lwnemesis

rrVeteran

Seattle, WA

MyPosts All Forum Topic
wjvail Is it possible your fuel is wet? Fuel that has absorbed too much moisture will exhibit the behavior you are describing. Can you borrow a tank a fuel from someone with known good fuel? The beginning of any engine trouble shooting includes a fresh plug and good fuel.
I second this comment. I had this same issue with my engine. It would idle great but when I started applying power it would just die. Someone at the field told me to try his fuel which was fresh and it worked like a charm.

Also I would tear the engine apart and look for any debris that got sucked in. I would also blow some air thru the carb just to clear it. Do not disassemble the diaphragm but you can pull that whole assembly off and clean the carb.

I have also had issue with the needle assembly unscrewing itself. Thisis something that others have had with the OS105 I would check that too.
SHARE  PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR  Quote
07-17-2019 02:25 PM  4 months ago
gwright

rrVeteran

Champaign Il

MyPosts All Forum Topic
Have you turned the governer off so that you have true throttle control to diagnose? While it doesn't fix problems, it sure makes it a lot easier to diagnose them when you know exactly where the throttle is compared to the stick. Same can be said for tuning needles. Always setup a simple throttle curve and tune needles, before activating governer. Governer will mask a lot of issues with engine tuning. although I primarily fly electric now, I did fly glow for over 30 years, and when governers came on the scene in the 90's they were both a blessing and a curse. wonderful when working but we quickly realized primary tuning needed to be without governer.Gary Wright
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2019 12:47 AM  3 months ago
Scooterpilot

rrKey Veteran

Southern, California

MyPosts All Forum Topic
The only problem I ever had with an OS105 was self induced. Opening up the throttle and the motor would die. Couldn't get it to run. Tore it down, cleaned everything and had the same problem. Finally figured it out. Now it works perfectly.Two G-4's & X50's YS60SR,Futaba 18SZ/12Z/14FG, ,Rail Blades Rep
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2019 01:32 PM  3 months ago
JuanRodriguez

rrProfessor

The Villages, Florida

MyPosts All Forum Topic
💎Sustaining Member
I guess we’re supposed to guess how you “figured it out” !!!Been there, done that and old enough to know better.....
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
07-19-2019 02:03 PM  3 months ago
Mark Ryder

Administrator

Ann Arbor, Michigan

MyPosts All Forum Topic
The topic starter has not been online for 6 months.Mark Ryder
SHARE  PM  EMAIL  GALLERY  Attn:RR  Quote
WATCH
 2 pages [ <<    <    ( 1 )     2     NEXT    >> ] 576 views POST REPLY
Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › OS105HZR Quits on spool up
 Print TOPIC  Make Suggestion 

 10  Topic Subscribe

Friday, November 15 - 11:12 pm - Copyright © 2000-2019 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online