ys91srx Tareq

[Heli$]

Ouch, I had 2 tail servos go out on mine. One time at a most in opportune time.

That's what makes nitros more of a rush.

[Heli$]

2 hard fights today with the enya 5 and so far so good. Flew it hard on the last flight and the back plate was hotter than usual for me but I could leave my pinky there forever and the temp reading was 120.

So far I've had 3 flights with the Enya 5 and no issues yet!

Praise the lord I may finally have my NX7 dialed in

[Rob43]

Excellent, Heli$!! Great to hear!

I am planning to fire my YS91SRX this weekend. Just blades off, set the idle, get it to run, test. I have some Enya #5 plugs. Man, $10/ea. Hope they last a while. Haven't found them for a bargain like I have OS #8's and Enya #4's.

[Guiwee]

Hey guys if the motor starts and runs for about 5 sec till cut off.Isnt that the idle screw since its at idle.need to lean it a little more?

[dominator]

If the motor is still cold and its shutting off after 5 seconds just blip the throttle a little or keep a high idle until the motor is warmed up. Fly around a bit and get a good tune on your main needles. Land and set a reliable idle with throttle trim. If its still dying after tuning the main needles and the motor is warm then your idle is probably too rich

[Rob43]

Discussion right up my alley too. When I replaced my bell/pinion/start shaft, I am once again also breaking in a new liner. It's darned grabby. Engine can barely run with the head held. Would have been easier if I was thinking better to remove the engine and pipe to access the starter shaft instead and keep running the prior GForce assembly. I just ran mine last night to retest idle and throttle setup. If I turn idle down so it's not very grabby, it won't stay running for long. Switching Vbar over to run without governor is also a PIA, so, I am not bothering with it. Might have to do so in order to get through the break-in period. I did break-in during a single afternoon session on my last YS60sr rebuild. Zero issues. Not sure how this will go. She wants to run, though!

[Guiwee]

So after about a 2 gallons through it,I noticed that I kept blowing my enya 5..switched to an O.S. 8 and all is well!! Don't mean blowing it but always seemed hard to start with the 5..since I used an 8 no issues....so far!! Motor has tons of power .punches out kind of like an electric.

[Rob43]

Now that is very interesting. So, to me, this is suggesting that it's running a bit on the cold side and needed the hotter plug to run properly.

Since my last reply, I have changed out my new clutch bell/block to my bell with a worn-in liner. So much easier to deal with. I did some hovering in the driveway, Vbar gov, and tuned rich to break-in. Seems fine at this point. Just need to burn fuel. It spooled up very smoothly, and didn't really sputter too much, although there's a fair amount of unburned fuel coming out the exhaust. I will put some more time on the ring before leaning it significantly.

I have had some difficulty igniting the Enya #5. Heavier filament, so more energy needed to glow it. Turned out my Pushglow wasn't up to it. I went to a glow stick until I could find an ignitor which would do the job. The Perfect Regulator one ingitor which I just installed seems to glow it sufficiently. I might get it out tomorrow for some test/tune time.

[mdu6]

I am running an OS8 - it is interesting that some are using an Enya5 which is a very cold plug.

The 91SRX manual states YS2, Enya3 or OS8 which are hot plugs.

I did see/hear that on the original 120 (which had a reputation of being challenging to tune) - some had success with colder plugs.

[Rob43]

I've not had a chance to experiment yet. I took on too many projects this spring. I look forward to getting back to breaking mine in. I've run one tank through it with the Enya 5, but was just hovering. But, it sounded excellent.