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Old 02-22-2015, 07:18 PM   #1 (permalink)
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Default Tareq motor and glow plugs

Hey guys

I have been having an issue with the 91srx Tareq motor from day one and it is doing my head in. I am going through glow plugs at an alarming rate, after 3-4 tanks.

Motor new out of box
30% Rotorrage
Matching hatori pipe
1960 head speed, governed
Have tried no gasket and gasket
New fuel line and filter
Switch glow pro
Tried OS8 and Enya 3
Fuel system is main tank moas (new sponge) and no header
Flying just above sea level and its summer here currently so temp is usually around 25celcius.
Flying style is smack and big air

Basically started at recommended needle settings and went through the Tim Jones tuning sequence, motor has stayed on the rich side if anything, but the plugs are failing. When I remove them they show no brown/dark discoloration but the coil is always completely bent out of shape and off to one side. Possibly the coil even looks a bit white?!?!.

Is it possible that running to rich is eating the glow plugs? and the way they come out looking explains it, or are there any other explanations you can think of.

Thanks Peter
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Old 02-22-2015, 09:02 PM   #2 (permalink)
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Many others on here have suggested using an enya 5 plug. Thats what I use and have good luck with it on this motor.
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Old 02-24-2015, 11:41 PM   #3 (permalink)
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Yes I have ordered some enya 5 but just seems strange that the 2 plugs recommended by ys are blowing so frequently. Just wondered if it could be something else, like running to rich??
Cheers P
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Old 02-25-2015, 12:00 AM   #4 (permalink)
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I went trough 3 OS8s during break in. One plug blew out and I had to do an emergency auto. At first I thought I was too lean but I realized I was still pretty rich. Engine temps barely got above 120 F and I had lots of smoke.
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Old 03-04-2015, 09:51 AM   #5 (permalink)
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i am using Enya 4 on my YS91 SRX with Byron Rotor Rage 30% with excellent results.

Back plate temp is approx 45 degC and heat sink slightly below 90 degC after flight.
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Old 03-04-2015, 09:12 PM   #6 (permalink)
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Enya 5 plugs arrived today so hope to try them out in the next week. I have had a few more flights (approx 5) since posting about this and been through 1 more plug. It seems like 1 click on the needles can be the difference between rich and lean, but overall the heli is covered in fuel after a couple of flights, so my question is still "can running rich blow plugs" ?????? would be great to get a few more opinions on this!
Oh and I have added a header tank with moas inside plus all new fuel lines throughout .
Cheers
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Old 03-04-2015, 11:44 PM   #7 (permalink)
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Usually rich will not kill plug. Check you rear bearing and if possible post a pic of your plug.
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Old 03-19-2015, 05:12 PM   #8 (permalink)
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I burned up 3 OS8s a week ago. One time I was lean and the others I was rich. I have some enya 5s which I'm gonna try now.

If they fail, I'll have to drop the engine and inspect the rear bearing. The engine only has 5 gallons through it.
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Old 05-17-2015, 04:14 PM   #9 (permalink)
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Watch for midrange - high range difference...
Hoover is midrange needle.
Full throttle is high needle.

When your midrange is a bit rich, your high a bit lean, the engine will heat up during full throttle for a short period.
To short to heat up the whole engine. But long enough to kill the plug

During smack you will hit full throttle pretty often, but never long.
Big air could get the throttle completely open. Doesnt have to...

Your problem is heat, or debris.
So lean, or something broken ;-)
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Old 05-20-2015, 09:17 PM   #10 (permalink)
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Hey thanks for that, yes that is pretty much the conclusion I came too. But cant be 100% sure as I changed to the enya 5 and have about 20 flights on the same plug. Now I'm having too much fun to risk going back to the 0s8:-)
BUT, I do have a new issue. I spool up and the heli is rock solid, no wobbles and the tail fin is rock solid. After a minute or so I get a constant slight shake and the tail fin is vibrating.
I can only assume it is the tune once the engine is warmed up, but have run out of ideas on what to tweak. Other than this the heli flys perfect and takes a beating with no problems. Obviously the vibe is not ideal for several reasons.
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Old 07-26-2015, 08:21 PM   #11 (permalink)
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Update on the shake/vibe issue. I think I may have finally figured out what was going on but its only been a few flights so need to get a few more in before the celebrations begin. On top of the vibe after a few minutes the engine was also going from rich to very lean when pushing it on the high needle.
I think it was the pressure value from the engine to the tank getting stuck and not pressurizing the tank properly. I took it apart and it was sticky with unburnt fuel, cleaned and dried it, re installed and got through 2 tanks of hard flying without any issues.
Fingers crossed, maybe now I will get more time in the air than wrenching. When running right this is by far my favorite heli to fly, Nitro Rules:-)
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Old 08-06-2015, 09:43 PM   #12 (permalink)
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Glag you got I sorted out. I've had that valve burn 2 motors up. From now on, before every flight I blow thru it before I fill up.
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Old 08-10-2015, 07:15 PM   #13 (permalink)
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Are you guys talking about the check valve on the line to the tank?
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Old 08-16-2015, 08:26 AM   #14 (permalink)
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Yes the check valve between the back plate and the main tank.
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Old 03-03-2017, 06:22 AM   #15 (permalink)
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That is what Tareq recommended I do and it solved the issue although I have run an OS8 with great results. I am using 22% nitro though.
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