Sportsman globe
Blow out price
Was $19
Now $8
Let there be 502
I purchased a great looking 502 from 1980. Cosmetically pristine, not even a paint loss at the bottom rim of the fuel tank, no rust inside it, all chrome parts are shiny. When I turned the knob 1/4 to the left, I expected to hear hiss but no response. Maybe this stove should have been used more often? There is for sure enough pumped air in the tank. I wonder if there is a solution to this issue other than having to take it apart.

Thank you,
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hikerduane
Guess you can remove the genny and see if it is clear and/or blow air back into the fount after removing the genny to maybe see if crud can be blown back out.  Half a pita.  I had issues with my genny this winter, gets deformed I guess, so when I reinstalled it after working on it, it was warped and would not seal to the fuel line, had a new one so got it working again.
Duane
Duane-All seasons, year round backpacker and camper.  So many stoves who's counting.
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dbosch
If you don't get flow of air from the valve with the generator removed, you might have found out why the stove is so pristine.  There have been examples of lanterns/stoves found that were in excellent condition but didn't work.  The original purchaser didn't return the item after trying it out years ago and it not working.  If you get no air flow, you will most likely have to pull the valve.  I don't think this will be your issue, most likely the pricker stem is not hooked up to the eccentric or the pricker wire is broken off in the orifice.
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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Jecsd1
Sounds like a genny issue. remove it and crack the valve and listen for air.

Your stove wouldn't happen to be a 10/80 would it? 
Jason

Coleman 275 Appreciation Syndicate # 1080
The Coleman Blue's 243's #1080

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Let there be 502
It is marked 2/80. Just as Dan said the pricker wire may be broken - because now I noticed that in close proximity it sounds as if it is "grinding" something every time I turn the valve. I would appreciate if anybody has a link to a pictorial guide or a video on how to remove the gen.

Many thanks,
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zoomkat
Make sure the stove is holding pressure after you pump it up. Often the gasket on the fuel valve leas when it is old. If the tank is holding pressure, Do you get a whoosh of air after pumping the stove up letting it sit for a while, then opening the fuel cap? With the tank pressurized, open the fuel valve fully and rotate the cleaning leaver and listen for air coming out the end of the generator (probably best done with fuel out of the tank). Below are some disassembly instructions for the stove.

https://www.colemancollectorsforum.com/post?id=4836387
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dbosch
Here is a copy of the instructions from the old town coleman site

http://www.oldtowncoleman.com/manuals/502-700.pdf
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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Eel
Welcome! 
One of the features of this place is the How-To section.  Here's a link to Project 502, an illustrated full teardown and rebuild.
https://www.colemancollectorsforum.com/post/project-502-4836387 

EEL Eclectic Lanterns, div.  Doofenshmirtz-EEL Incorporated.

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Let there be 502
Thank you all for the links to useful guides. I will roll up my sleeves and get on it. 
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fuel brained
Welcome to the Neighborhood. Did you check the cap gasket. It might not be holding pressure at all. Good luck and please post a money shot when finished. Jeff
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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