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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › My YS-80 is smoking Glowplugs. Help!
11-10-2005 01:53 PM  12 years agoPost 1
gullie667

rrVeteran

Brooklyn, NY

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I have a quick question about a YS-80 heli engine
installed in a raptor 60 I recently got.

Can you burn up glow plugs just by having the engine
to lean?
I installed a new glow plug.
Once running, I ran the engine to about 2/3 throttel. There was some smoke from the exaust but it was running lean. (30% Wild Cat)
I stayed at around 2/3 throttle for no more than 2 min. and the engine cut out. After some inpesction I found that the glow plug was shot. I have done this 2
times and have had the same results.

Do you have any idea what the problem could be?

Thanks,
Gullie

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11-10-2005 02:00 PM  12 years agoPost 2
tchavei

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Portugal

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a lean run will kill your plug. moderately lean will distort the glow element. Insisting on the lean side will burn it out unless your engine dies first.

Keep it on the rich side. If breaking-in engine keep it slobbery rich.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-10-2005 02:25 PM  12 years agoPost 3
airdodger

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Johnston USA

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Yeah the problem is you. Why would you knowingly run the engine lean? And you did it twice. I would be more worried about the damage you may have done to the engine. Take off the muffler and see if there are lines in the piston, (scored). Chris

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11-10-2005 02:48 PM  12 years agoPost 4
gullie667

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Brooklyn, NY

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The engine was used so I am not sure about its history. I am trying to get it tunned. It was obviously set on in a different climate and I am just trying to set the needle.
How lean does it need to be do kill a glowplug? The Ys-80 wasn't that lean (I don't think) b/c it did have some smoke.

I only have exp. w/ 30 class engines untill now. In a 30, even when very lean I never saw an engine totaly distory the element in a glow plug, let alone that quick.

Thoughts?

Gullie

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11-10-2005 03:04 PM  12 years agoPost 5
tchavei

rrProfessor

Portugal

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Never had a 30 so I don't know but I once melted a glowplug in an OS70 by letting it idle lean for 30 seconds... didn't know better at that time but when I pullled the plug the glow element had melted away.

When re-tuning an engine you should reset needles to factory settings and start from there... if you did and its still lean, check your plumbing

Oh and don't check the engine by its smoke... that depends greatly on the ambient air temp and the fuel itself.

Cheers
Tony


--------------------
"Perfection and patience usually walk side by side..."

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11-10-2005 03:10 PM  12 years agoPost 6
rob10000

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Western Massachusettes

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If you have a bearing letting go the debris can kill a plug pretty quick, too.

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11-10-2005 04:03 PM  12 years agoPost 7
JuanRodriguez

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The Villages, Florida

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Gullie,
Oh and don't check the engine by its smoke... that depends greatly on the ambient air temp and the fuel itself.
I can't agree more with TC.......additionally, Two things.......

When you run 30 % fuel with the higher oil content, you will get a lot more smoke than you would running 15% or similar type fuel.....

Secondly, when running ANY YS motor, it's been my experience that you will get more smoke than a "conventional" motor..........

For those reasons, it is ill advised to "tune" your motor by __only__using the smoke you see as a guide.....

You did not mention the type of plug you are using...... The Enya 3's seem to work the best with YS 2 strokers.....

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11-12-2005 01:25 AM  12 years agoPost 8
TAZZY

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Westfield,MA

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i found using enya3 glowplugs work really well.
i would definetly take off the head and inspect the insides. i had a tt50 and it kept blowing plugs, i found out that the bearing cases were coming apart and pushing in the plug filaments. it could also be a broken g-clip that is doing the same thing, take it apart and inspect it before you do anymore damage.

GDay

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11-18-2005 05:24 AM  12 years agoPost 9
3DNinja Guy

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Wichita, Ks

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I've run 2 washers on my OS 8 glow plugs. And believe it or not. It quit blowing the plug. You could also get a .001-.002 head shim from Rick's Heli's..and that'll save on your plugs. (This is only if you've dis-assembled the engine,,,and found nothing rattling around inside as the other guys suggested in the earlier post.) You may be getting to much compression.
David Berry

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