200A and 202 reproduction
frames back
in stock.
fuel brained
I fired up a friends 6-73 200a and let it burn for a few minutes and then heard a loud bang. Went to look at the lantern and noticed that the generator had exploded destroying the globe with it. Any else have this problem?? This is the second one in 5yrs I think. If I would of it I would have taken a pic.
Pastor Jeff
God said "Let there be light" so He let His Son shine.
SoCal and Lovin' It
US Navy Submarine Cold War Veteran
MilSpec Ops #1960 "Feel the Roar"
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macwacs
Might be using the wrong mantel? letting it sit to close to the generator. That's my guess anyway.
 RMW
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SteveRetherford
my guess , something clogged the gas tip and with so much heat it compromised the genny . i dont really understand it ,  its never happened here . like why doesnt it happen when we clean a gas tip and move the pricker up in a running lantern ? .
[DrSteve2]    Steve , Keeper of the Light !!!
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Cigar_Mike
My guess is water got in the generator.
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scl
how bad was the fireball.
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SteveRetherford
oh , ya , heated water can really expand !!!
[DrSteve2]    Steve , Keeper of the Light !!!
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74HARLEY
I think Mike has it! 
Joe
looking for 200a 11-56,9-77,2-65 Coleman 275 appreciation syndicate member #0004 ICCC #1262 
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1hpycmpr
Glad no one was hurt.  Pretty scary stuff.
Mark
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JimL
Not here.  The only exploding generators I’ve read of involved preheating with the pricker lever up.  Mike’s comment about water makes a lot of sense.  Even more so if the generator was recently cleaned and not flushed afterwards, like with carb cleaner.

-Jim

Have you ever imagined a world with no hypothetical situations?
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Chucker
Moisture in the fuel, what Mike said. 
Chuck
"Stop being angry, and forget about getting back at people; do not worry -- it only causes harm." Ps. 37:8
Eye-SEE-C-C Member #1333 -- MilSpecOps #003
"Michigan - from the Ojibwa word “meicigama,” meaning “great water.”
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SteveRetherford
So Jeff , can you check the fuel for water ? n confirm ?

maybe lite it again with a new genny LOL just kidding about that . but curious as to whether the fuel is contaminated ?
[DrSteve2]    Steve , Keeper of the Light !!!
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GrayClay
For explosive pressure to build up in the generator, both the tip and the valve would need to be closed or clogged.
If the tip only is clogged, the excess pressure would return to the fount... unless that path is blocked as well.
Clay. Sierra Foothills, California
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fuel brained
To answer all questions 
1 Coleman 21 new burnt in silk lite and cooled. Tied on the burner ring.
2. Pricker in the burn position
3. Drained the fuel and it is cloudy which tells me moisture. Must have been moisture in the fount as the fuel           was from a new Crown can
4. No one hurt just the new Generator and mic globe.
5 Didn't see the fireball but it did soot the chain link fence. I do all lantern test burning out side over a 25 gallon drum. Safety first
Pastor Jeff
God said "Let there be light" so He let His Son shine.
SoCal and Lovin' It
US Navy Submarine Cold War Veteran
MilSpec Ops #1960 "Feel the Roar"
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dbosch
Quote:
For explosive pressure to build up in the generator, both the tip and the valve would need to be closed or clogged.
If the tip only is clogged, the excess pressure would return to the fount... unless that path is blocked as well.


This.  I say a crack that propagated in the generator wall.
Dan B.  ICCC #100
The Texas Dust Bowl

Faith is not about everything turning out okay; faith is about being okay no matter how things turn out.
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Phredd
Okay.  I'm now thoroughly convinced to light newly fettled machines outside.....
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Chucker
Thanks for the after action run down Jeff. Sounds like you have it narrowed down. 
Chuck
"Stop being angry, and forget about getting back at people; do not worry -- it only causes harm." Ps. 37:8
Eye-SEE-C-C Member #1333 -- MilSpecOps #003
"Michigan - from the Ojibwa word “meicigama,” meaning “great water.”
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zoomkat
I don't see water in the fuel causing a catastrophic pressure excursion in the generator. The possibility of the fuel flow path thru the generator on a running lantern becoming blocked at almost the exact time to cause a pressure excursion is also remote. Could have been a defect in the generator, but even that is suspect for an explosive event. Any kids around where the lantern was located?
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fuel brained
I only test on the backside of my shed and have a large ABC fire extinguisher. No kids live in the trailer park. Still looking at the generator. Might have had a bad tip.
Pastor Jeff
God said "Let there be light" so He let His Son shine.
SoCal and Lovin' It
US Navy Submarine Cold War Veteran
MilSpec Ops #1960 "Feel the Roar"
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zoomkat
"Still looking at the generator"

Can you post a picture of it? If the generator tip got plugged, the generator internal pressure would probably still be the same as the tank pressure.
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Jimmy_c
Water expands 1600% when changed to steam.jim 2nd steam ENG.
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fuel brained
Officially listed the generator as "MIA". Found a gouge in the side of the shed. Must of bounced of and went missing. sorry no pic.
Pastor Jeff
God said "Let there be light" so He let His Son shine.
SoCal and Lovin' It
US Navy Submarine Cold War Veteran
MilSpec Ops #1960 "Feel the Roar"
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Dmacp
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Drained the fuel and it is cloudy which tells me moisture. Must have been moisture in the fount as the fuel          


water and fuel don't mix, unless the fuel is alcohol, or mixed with alcohol.
Dan
ICCC member #604
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Gasman64
Phredd wrote:
Okay.  I'm now thoroughly convinced to light newly fettled machines outside.....

Always, always, always!
Steve    ICCC #1012
"1200"
 
        
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pagrey
My understanding is that when the lantern backfires or something causes a pressure surge in the generator the fuel air rod is forced down against the spring and closes off the fount preventing pressure surges in the tank. If you pull a fuel air tube you can see pressing down on the rod closes off everything. So when the water drop reaches the generator and expands the fuel rod slams closed and there isn't enough space for the gas to escape fast enough through the tip and pop goes the generator.
Paul
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SteveRetherford
Hmmmm , i wonder if thats it .
[DrSteve2]    Steve , Keeper of the Light !!!
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JeepJeepster
Fount isnt closed off if the fa rod is forced down.... The top portion of the fuel pickup tube would still be wide open to the air in the fount.
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pagrey
I was suggesting that the top would close off like this but the spring binds and the rod would probably hit the bottom of the fount anyway so I think you're correct, probably not what happens at all.

15653711283691.jpg 
Paul
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zoomkat
Reverse flow being shut off by the fuel control rod is a bit of a stretch for me. The rod would have to be forced down on to the flange under the fuel rod collar for any potential sealing. Developing downward pressure on top of the rod collar sufficient to move the rod against spring pressure is also questionable as there is a significant gap between the collar and the inner tube wall. The rod tip may also bottom out on the tank bottom limiting its downward travel. That being said, the "explosion" event itself is somewhat lacking in details.   
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HercL4D2
You just cannot put any fuel in the fount. 
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JeepJeepster
pagrey wrote:
I was suggesting that the top would close off like this but the spring binds and the rod would probably hit the bottom of the fount anyway so I think you're correct, probably not what happens at all.

 


Ahh, that makes more sense. Ill have to pay attention to that detail during future fettles to see if that could potentially somewhat seal off.  
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hikerduane
Message from above Jeff?  Any crack of thunder at the same time?  🙂
Duane
Duane-All seasons, year round backpacker and camper.  So many stoves who's counting.
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fuel brained
JeepJeepster, I wrote off as one of those things that just happen.

Hikerduane, Just a "BIG" gang.
Pastor Jeff
God said "Let there be light" so He let His Son shine.
SoCal and Lovin' It
US Navy Submarine Cold War Veteran
MilSpec Ops #1960 "Feel the Roar"
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Barrett
I don't know if those gennys have a spring or cardboard tube in it, but was wondering whether if it was cardboard then maybe if water had been drawn up and upon reaching the clear area of genny expands into steam and the jet and fuel soaked/swollen cardboard restrict that quick expansion enough to the point of rupture? 
Andrew

Living and learning in NZ
Hoping to reach cognitive and emotional maturity before my children do.
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atomicbee
just finished my 2nd 200a tear down and rebuild and notice this bump near the top of generator? did someone repair this in the past or was it getting ready to explode? Click image for larger version - Name: 200a Generator.jpg, Views: 46, Size: 67.46 KB
 Bally Coleman Bill
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Chucker
If that truly has a bulge I'd toss it. 
Chuck
"Stop being angry, and forget about getting back at people; do not worry -- it only causes harm." Ps. 37:8
Eye-SEE-C-C Member #1333 -- MilSpecOps #003
"Michigan - from the Ojibwa word “meicigama,” meaning “great water.”
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Gand28
atomicbee wrote:
just finished my 2nd 200a tear down and rebuild and notice this bump near the top of generator? did someone repair this in the past or was it getting ready to explode?


Hard to tell in the picture, but the top piece is soldered on.  There is usually a bump of silver solder around the top.
Greg -- Fiat Lux!
ICCC Member #1273
Seeker of Canadian Nickel!
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atomicbee
Yes it will never see another lantern,it starts about 1/4 from top and only it that spot on the generator leading me to believe it had a crack or hole and they tried to repair it.cleaning needle was rolled up on the inside and was discovered on the tear down.when I removed the check valve it was missing the o-ring also I fired her up last night and she ran smooth and bright!
 Bally Coleman Bill
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MYN
Clogged generators and water in the fuel are common troubles in all GPAs but I don't think these are really the causes. Else we'd be getting such explosions as some usual affairs and GPAs would have been banned long ago.
I believe its just that the generator was already structurally compromised by stresses, cracks, material loss over time, etc from a variety of reasons. For instance, imagine operating one that has stress cracks. If you're lucky, perhaps you'd get a sooty flame-up from a tiny rupture. Otherwise, you'd get what you've gotten, should the crack propagates too quickly before the leak has time to even flame-up.
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mikew
atomicbee wrote:
Yes it will never see another lantern,it starts about 1/4 from top and only it that spot on the generator leading me to believe it had a crack or hole and they tried to repair it.cleaning needle was rolled up on the inside and was discovered on the tear down.when I removed the check valve it was missing the o-ring also I fired her up last night and she ran smooth and bright!


The 200A check valves did not have o-rings that I'm aware of.   Believe that started with the later lanterns.  Someone please correct me if that is not right.
Mike
"... at evening time, it shall be light." Zechariah 14:7

Slant Saver #05; Milspec Ops 0045
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salukispeed
What about a hole developed in the Mantle and pointing directly at the Generator. Easily enough heat to induce failure/rupture and the escaping gas creates the explosion. Might explain the blistered one in the last picture from Atomicbee. it is just below the point where it is in the air tube...... A scary thought is that somewhere on one of my lanterns is a generator with a similar blister that I dismissed as a manufacture flaw
Bob
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