RunRyder RC
 3  Topic Subscribe
WATCH
 1 page 665 views TOPIC CLOSED
08-10-2010 04:48 AM  7 years agoPost 1
robv

rrApprentice

SoCal

My Posts: All  Forum  Topic

I have a HR Stratus and I just bought a brand new YS91SR-3DS and SB19 for it. Break in was smooth, took my time and even added a couple extra tanks of running it really rich. As soon as I started to lean it out, after about 6-7 tanks, I noticed that the tail would start to drift left and right and even kick intermittently.
I suspect it to be a vibration issue. The fuel in the tank is foaming like crazy, engine surges, and the tail is most evident. The screws on my tail fin even came loose! Lol

The motor I had before was an OS91HZ and it flew smooth like butter. As soon as I swapped motors... BAMMMM... issues! I did, however, dial indicated the fan but that seemed to not help much.

Any help will be greatly appreciated.

Team JR | Gens Ace | YS Engines | Scorpion Motors | Pure Tech

PM  EMAIL  GALLERY  Attn:RR
08-10-2010 12:40 PM  7 years agoPost 2
airdodger

rrElite Veteran

Johnston USA

My Posts: All  Forum  Topic

You did not do your engine any favor breaking in rich, what do the instructions say. The hone wears in a short time, if enough pressure is not applied to the ring right away you can glaze the liner and it will not run correct. I don't know if that is your problem, but you should at least be aware this can be an issue. The fan needs to be dialed to no more than .001 runout or better, if you want to be sure vibration is not going to be a problem. You could try a new quality plug first, next is to pressure test the fuel system to make sure no leaks are evident.

Chris

PM  EMAIL  GALLERY  Attn:RR
08-10-2010 01:17 PM  7 years agoPost 3
Saleh

rrVeteran

Kuwait

My Posts: All  Forum  Topic

umm your engine might be lean

If you aint crashing you aint flyin

PM  EMAIL  HOMEPAGE  GALLERY  Attn:RR
08-10-2010 07:22 PM  7 years agoPost 4
robv

rrApprentice

SoCal

My Posts: All  Forum  Topic

You did not do your engine any favor breaking in rich, what do the instructions say. The hone wears in a short time, if enough pressure is not applied to the ring right away you can glaze the liner and it will not run correct. I don't know if that is your problem, but you should at least be aware this can be an issue. The fan needs to be dialed to no more than .001 runout or better, if you want to be sure vibration is not going to be a problem. You could try a new quality plug first, next is to pressure test the fuel system to make sure no leaks are evident.
Ive dialed the fan to .001. After each flight, I relieve the pressure from the tank so is that evidence of no pressure leaks? After breaking it in I changed the plug. I use OS-8s.
umm your engine might be lean
How rich should I run it? I am at 1.5 turns on the mid and 1 turn on the high. Temps are around 150-160 degrees fahrenheit.

Team JR | Gens Ace | YS Engines | Scorpion Motors | Pure Tech

PM  EMAIL  GALLERY  Attn:RR
08-10-2010 07:50 PM  7 years agoPost 5
airdodger

rrElite Veteran

Johnston USA

My Posts: All  Forum  Topic

Just because you have some pressure does not mean some part of the system is not leaking when the pressure gets greater, bear that in mind. I have found leaks in the systems of almost all the people I have helped with your kind of problem. Start with the factory settings and adjust from that point. The engine may still be too rich, go a couple clicks at a time if it gets better keep going that way, if worse go the other way, until it acts up and back off a couple clicks. I never go by temps but that sounds too cool to me. The YS engines I have don't tolerate rich like an OS will.

Chris

PM  EMAIL  GALLERY  Attn:RR
08-10-2010 09:08 PM  7 years agoPost 6
robv

rrApprentice

SoCal

My Posts: All  Forum  Topic

The YS engines I have don't tolerate rich like an OS will.
Chris,

Thank you for your help. Doesn't the YS like to run rich? At least that is what every one is telling me. Anyways, which needle should I tune with first?

Team JR | Gens Ace | YS Engines | Scorpion Motors | Pure Tech

PM  EMAIL  GALLERY  Attn:RR
08-10-2010 10:23 PM  7 years agoPost 7
airdodger

rrElite Veteran

Johnston USA

My Posts: All  Forum  Topic

You will need to go back and forth a few times, I start with the high speed needle , then go to mid, back to high it may need to be opened if you closed the mid some. I keep the pitch reasonable while doing this so I don't put high loads on the engine, has to be enough to load some but not enough to slow the engine a lot. I use around 9-10 degrees. If the idle is set correct (low), the engine should drop right out of high speed to idle without hesitation or speeding up. The Ys once adjusted needs little if any adjustment, with the exception of seasonal changes.

Chris

PM  EMAIL  GALLERY  Attn:RR
09-25-2010 11:38 PM  7 years agoPost 8
robv

rrApprentice

SoCal

My Posts: All  Forum  Topic

Thanks to all. Got it some what tuned. Anyways, it runs better.

Team JR | Gens Ace | YS Engines | Scorpion Motors | Pure Tech

PM  EMAIL  GALLERY  Attn:RR
WATCH
 1 page 665 views TOPIC CLOSED
 Print TOPIC  Make Suggestion 

 3  Topic Subscribe

Monday, May 28 - 11:07 am - Copyright © 2000-2018 RunRyder   EMAILEnable Cookies

Login Here
 New Subscriptions 
 Buddies Online