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HomeAircraftHelicopterGasser Model RC HelicoptersOther › How to check the plug on a gasser (SOLVED!!!)
04-10-2010 03:52 PM  8 years agoPost 21
shawmcky

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Isle of Wight,United Kingdom

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Unless you have already done it
Might pay just to double check all your EI connections first.

Team- unbiased opinion.K.I.S.S principle upheld here

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04-10-2010 05:57 PM  8 years agoPost 22
rotormonkey

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Ottawa, ON - Canada

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Yep, sure did.

Here's a question though... I noticed that the battery lead from the EI has a signal wire. Why is that? You don't have to plug it into the receiver at all do you?

If it can't hover, it ain't worth flying.

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04-10-2010 06:34 PM  8 years agoPost 23
shawmcky

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Isle of Wight,United Kingdom

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Does it show a place for the wire
In the engine manual?i dont have an EI motor so i am not familiar with the system.Is it the stock unit?

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04-10-2010 06:41 PM  8 years agoPost 24
rotormonkey

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Ottawa, ON - Canada

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In the manual it looks like it's just going straight from a switch to a battery. But why the signal wire then? Just seems odd is all.

Yeah it's the stock EI as far as I'm aware.

If it can't hover, it ain't worth flying.

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04-10-2010 06:43 PM  8 years agoPost 25
shawmcky

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Isle of Wight,United Kingdom

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Found a manual online
and it shows on one side three wires consisting of, HT plug lead ,earth wire, and connector for the trigger sensor,battery feed on the other side of the unit.

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04-11-2010 05:18 AM  8 years agoPost 26
rotormonkey

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Ottawa, ON - Canada

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The mystery is solved!!! I ended up taking my heli over to a buddy's house (airplane guy) familiar with gas motors. He looked it over for a while trying to figure out what was wrong. Eventually he pulled my sensor out despite my telling him that I was sure it was lined up correctly.

He passed a magnet over the sensor, and voila! It sparked! Put the sensor back in the heli and nothing... It IS lined up right though..

Just for the hell of it, he grabs one of his steel allen wrenches, and sticks it to the magnet he was using to make the sensor go. It sticks. He then takes the same allen wrench and sticks it to my EI magnet. Nothing. It didn't stick. My magnet is not magnetized anymore.

I would have never guessed in a million years...

Ahh well.. Anybody know where I can pick up a new magnet the right diameter, and whatnot?

If it can't hover, it ain't worth flying.

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04-11-2010 05:50 AM  8 years agoPost 27
seflyer

rrApprentice

Northern California, Palo Cedro

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a gv 1 magnet should work, appear to be the same size. rare earth magnets can be found at radio shack.

Kevin

My heli is right side up -- the world is upside down

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04-11-2010 06:45 AM  8 years agoPost 28
Billme

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MS

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I have used the radio shack magnets..they are about 5mm diameter..

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04-11-2010 07:08 AM  8 years agoPost 29
shawmcky

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Isle of Wight,United Kingdom

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rotormonkey
Great stuff,you will have that bird in the air soon now

Team- unbiased opinion.K.I.S.S principle upheld here

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09-23-2012 05:04 AM  5 years agoPost 30
Digger1973

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Amherst, NS, Canada

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Building mine right now with the same no spark issue. If I take the sensor and run it over the magnet in my hand I can get a spark with it pretty much touching the magnet, when mounted I get nothing. Is there an easy way to test if the sensor is bad or the magnet is bad?

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09-25-2012 04:05 PM  5 years agoPost 31
Rodney

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St.Cloud,Florida

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Just from what you wrote, I would say magnet is weak. You can get a rare earth magnet from radio shack. Much stronger than stock one. But check is polarity before install as it only reads on one side of magnet, maybe the magnet you have is upside down in fan. I just installed new hwc ignition and had to remove magnet and reverse it to get it to spark.

Dx7 With Ion Power Supply. Why use anything else.

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09-25-2012 05:40 PM  5 years agoPost 32
RM3

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Killeen, Texas - USA

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You have to be really careful selecting a replacement magnet....remember the ignition needs to trigger off of that magnet at a precise angle of rotation before TDC. if you do get a replacement I would highly recommend checking the timing as per the manual to the ignition unit. If you get a really really strong magnet the hall effect sensor may trigger too early causing a really crappy idle and a hot running motor at high RPM.

showing a preference will only get you into trouble, 90% of everything is crap...

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