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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › ys 91srx tareq break-in needle settings
04-30-2018 11:38 PM  3 months agoPost 41
Yeager

rrApprentice

Lisbon, Portugal

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JuanRodriguez
No, what we mean is to clamp the fuel line to the carb AND release the tank pressure after EVERY flight
Ok, I was probably not clear enough. You would shut down the engine with the transmitter and THEN clamp the fuel supply and release the tank pressure - as opposed to clamp the fuel supply to actually STOP the engine?

Anyways, I've got no problems restarting the YS96SRX after having shut it down from the receiver (throttle lever//carburetor close), relief tank pressure and clamp the fuel supply.

Robbe Nova Cuatro Gas/Nitro, Futura Nova Nitro, Futura SS Nitro, Vario Scale S300C/1002/21 Gas.

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05-01-2018 02:00 AM  3 months agoPost 42
JuanRodriguez

rrProfessor

The Villages, Florida

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I’ve always shut my motors down by clamping the fuel line while at idle and then relieving the pressure. But the way you just describe it will work as well ASSUMING you’re doing it after EVERY flight ......

Been there, done that and old enough to know better.....

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05-01-2018 02:31 AM  3 months agoPost 43
ticedoff8

rrKey Veteran

Morgan Hill, CA. USA

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I know it's an old topic, but I'd like to chip in on the highlights in BOLD I've just been breaking in my YS96SRX and had issues with getting my Align starter to start the engine. The trick for me was to initially clamp (stop, and assure no fuel flow) fuel from entering the engine during engine shut down, and then REMOVE the pressure from the tank. Open the throttle (carburetor) to max. Dry crank the engine as soon as possible (1-2 minutes after shut down) with the starter for 2-3 seconds. Later on (after maybe 3-5 fuel tanks of run in), I'd shut down the engine with "normal" throttle cut on the remote, but FIRST thing to do as you stop the rotor blades, relief the pressure in the fuel tank AND stop fuel (clamp) from entering the engine. You want all residual fuel (or almost all) to exit the engine, after shut down. It all gets more and more smooth and "normal" after break in. BUT, ALWAYS, ALWAYS, relief the pressure from the fuel tank (fuel line coming form the regulator at the bottom of the engine) and clamp (cut off) fuel line from the fuel tank going to the engine. Always make sure no fuel gets pressured into the engine during refueling as well. When refueling the heli, make sure you're no pressurizing the fuel tank, by relieving the pressure in the tank after (or during) refueling. That's it from me.
Your problem is not your shutdown procedure.
It is the starter.

I gave up on the Align starter years ago when it would not start my OS 91HZ-PSS engines.
The hammering and stalling happened on every start. It was a crapshoot and embarrassing.
The eHeli guys ribbed me mercilessly when I couldn't start the engines without loosening the glowplug or some other BS workaround.
I even tried jerry-rigging a 4S LiPo - and the relay would weld closed and it would not shutoff

The "solution" is to use a standard RC 12v starter with the helicopter-extension wand. I use a 3S LiPo stuck to the side.
It is almost 20 years old and has stated everything from an Enya 45 to a YS 120SR-X.

Believe 1/2 of what you see and none of what you hear.
Fake News will be the downfall of our Republic!

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05-01-2018 11:23 AM  3 months agoPost 44
Richardmid1

rrProfessor

Leeds, England

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Richardmid1
I always clamp the fuel line AND release tank pressure to stop the engine. Everyone should do this, im surprised it's not in the manuals.

60% of the time, it works every time!

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