New YS-61ST-2 won't start!!!

[chrisg3]

Hey Freaks,
I'm having difficulty starting my new YS-61ST-2. I have confirmed the following:
* Glow plug (enya#3) is good and is heating up properly
* Fuel lines, pressure lines hooked up correctly
* Engine is getting fuel (after numerous starting attemps, I tried starting with more and more throttle and ultimately flooded it)
* Using Wildcat 15% (which worked great in my old YS61)
* Mixture screws are set to manufacturers specs for initial starting (all 3)
Hover 1.75 open
Low 1.25 open
High 1.5 open
* Check valve is installed in correct direction and location
During this starting sequence (approx 10 minutes in duration) the engine only sounded like it was gonna start twice, however it never took off on it's own.
Question: Should I begin to lean out the low range or high range mixture? Someone suggested to lean out the high speed due to it's large fuel volume metering (I guess they think the high speed mixture will dramatically reduce the fuel amount and thus lean the overall to get it started.
I've never encountered a new engine that wouldn't even begin to run.
Any suggestion would be greatly appreciated.
Regards,
Chris

[DavidH]

When I was using the YS 61 ST II. I ran the needles leaner than what you have yours set and the motor ran fine. You needle settings are within reason and the motor should run.
Can you see fuel going thru the fuel line to the inlet on the motor when you crank on the motor?

A good way to get it started the first time to see if it is a fuel problem. Open the carb wide open and squirt a little fuel directly into the carb. Then close the barrel to idle position. Put the glow igniter on the plug and then crank the engine. It should at least fire for a couple of seconds by doing this. If it does and then quits. I would say you have a fuel delivery problem.

David

[chrisg3]

David,
I tested the engine again and now I'm confused. I fill the tank, place the glow plug starter in place, and retard the throttle all the way (including the trim). I've verified that the carb is all the way closed. Then run the starter approx 10 seconds. After which I can then pour a small handful of fuel from the exhaust. Does this soud like a normal amount of fuel that would go through the carb when it's closed?
Regards,
Chris

[Gary O]

That sounds like way too much. Are you sure about the check valve? The little notch in the valve goes toward the engine. It could be that the check valve is bad. Is it the new one ot the one you had on t he previous engine?

[DavidH]

Chris,
I read you said you have the lines hooked up correctly.

Where is the line with the check valve hooked up?

David

[chrisg3]

Hey Freaks,
I'm still stuck. I've tried everything... I have swapped out check valves, replaced the plug, used a different glow starter, leaned all 3 mixtures, I still cannot get this engine to fire. I know this sounds silly but all I've got left to try is to run some 30% nitro. I've been using 15% Wildcat for years (even in my old YS 61st1).
Do you think there is any chance that it would not even start on 15%, yet run on 30%? Seems to me it would atleast run crappy on 15%.
What do you guys think?
Regards,
Chris

[andydenis]

We had a gut strip his Webra 50 down at the field from stock and his piston was 180 degrees out and didnt get any compression on the engine due to the piston having a longer flap on one side than the other do YS have the same type of piston? are you getting compression?

[Alfred]

I have one in my 1003 X-Cell.
It runs just fine on 20% Nitro, 20% synthetic oil, castor oil is a no no.

You just haven't given enough info to take a closer guess.
Have you disconnected the lines and blown into the one end to check fuel flow coming out the other? That's without the valve.
After un-sucsessful tries, did you pull the glow plug and checked if it had fuel or oil inside the coil?

Try this:
Tank empty
Set all needles at the exact settings as described in the manual (the break in settings).
Open throttle fully and turn engine over for a few bursts, this should clear any oil that might have collected on the diaphram and carby.
When you fill the tank, clamp the carby side shut to stop fuel filling up the carby while filling the tank.
With carby in idle position, try to start the engine, this might take up to 4-5 long bursts as you now need to fill the diaphram plus carby with fuel, the built in pressure pump does not work in the low idle position so it takes a bit longer to get the fuel back up to the piston.
The break in needle positions will get the engine going so don't feedle with them.
If it doens't work then the problem is somewhere else.
Try a Enya #3 plug.
Don't confuse the high and midrange needles. The long one is the midrange and the shorter one is the High end needle.
Idle is the small screw in the middle of the barrel.

[chrisg3]

We'll 30% Notro did the trick. I don't know why but it would not start on my Wildcat 15%. I put the CP 30% and it fired up.

Thanks for all the help,
Chris

[flyinfool]

It should have run fine on the 15%.
Now that it is running did you try the 15% again?
I suppose it is possible to have a bad jug of fuel.

[DavidH]

Yep sounds like a bad jug of fuel to me also. I use Morgan Fuels when I was using YS 61 ST2. I swapped back and forth between CP 30% and 15% a couple of times. I was flying the heli in shoot for a TV commerical and didn't need the smoke so I used 15%.
Only had to change the needle a few clicks and it worked great.
Sounds like the 15% fuel you was trying to use was contaminated or had lost it's punch. I bet a fresh jug of 15% and the motor would run fine on it also.

David