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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › glow plug pops out
02-08-2006 01:35 AM  12 years agoPost 1
thaus

rrNovice

Vero Beach, FL

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I have owned about 20 OS engines. Only one has a problem keeping the glow plug screwed in. This OS 50SX-H with OS#8 has blown the glow plug out about 4 times on 15% nitro.

What is a good solution to stop the blow out?
Would locktite help, or is there too much heat?
I have always used the copper washer under the plug.

Ted

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02-08-2006 01:43 AM  12 years agoPost 2
Ruff

rrVeteran

Queen Creek, AZ

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Something is amiss. I have owned three OS 50's and have never had the plug come out.

If your not running it too lean, I would replace the head.

Ruff

http://srcha.com

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02-08-2006 04:23 AM  12 years agoPost 3
airdodger

rrElite Veteran

Johnston USA

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The only time I have seen this happen is when the engine was way too hot, unless you stripped the head. Chris

Chris

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02-09-2006 01:02 AM  12 years agoPost 4
Heli-pres

rrApprentice

American Fork

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Popping out
I would say the threads in the head are stripped
JOHN

Quick UK Flight Team

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02-09-2006 04:59 AM  12 years agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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This happened to me last summer in an OS 70. The plug popped out. After I replaced it, I found the plug would come loose on subsequent flights.

The threads in the head were fine. You may be a bit lean, and you may simply need to tighten the plug down a bit more. I richened my 70 a bit, and tightened the plug back down, making sure it was tight. No more plug spitting here.

Dave

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02-09-2006 05:15 AM  12 years agoPost 6
Tanager

rrApprentice

El Monte, California

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Like the others said, you're cooking your motor.

The head expands due to excessive heat enough that the glow plug can blow, and often and amazingly doesn't necessarily ruin the threads.

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HomeAircraftHelicopterEngines Plugs Mufflers Fuel › glow plug pops out
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