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PostPosted: Wed Apr 10, 2013 11:46 pm 
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Joined: Tue Mar 11, 2008 11:12 pm
Posts: 103
Location: Nanaimo, British Columbia
Hello all, I have an old Crosman Mark 2 that I had resealed two years ago. It worked great until recently. Now, even with a new CO2 cylinder, there isn't sufficient power to fire a pellet out of the barrel. Has anyone else had a similar problem? If so, what was the fix?


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PostPosted: Thu Apr 11, 2013 10:29 am 
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Joined: Mon Mar 09, 2009 6:46 pm
Posts: 1395
Location: r Alberta
Try a bit of pellet gun oil on the CO2 cartridge tip. The seals may have dried out.


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PostPosted: Thu Apr 11, 2013 8:47 pm 
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Joined: Tue Mar 11, 2008 11:12 pm
Posts: 103
Location: Nanaimo, British Columbia
The seals hold CO2 just fine. The problem is that each time I cock the gun and fire insufficient gas leaves the gun to fire the pellet.


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PostPosted: Thu Apr 11, 2013 9:57 pm 
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Joined: Tue Jun 03, 2008 5:46 pm
Posts: 2815
Location: Canada
I'm by no means any kind of expert...in particular with a MK2, but have a couple ideas you might check on.

Barrel may have turned causing the transfer port to not line up properly...check the grub screw on top and just ahead of the breech end barrel nut.

Is it easier to cock than before? Might have to remove the barrel housing and striker spring to check the condition of the spring.

After that, I would be thinking "valve stem"...

Hope that helps some.

Al


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PostPosted: Thu Apr 11, 2013 11:21 pm 
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Joined: Tue Mar 11, 2008 11:12 pm
Posts: 103
Location: Nanaimo, British Columbia
Thank you for the ideas. After looking at it and reading more on the internet, I think the next step is to replace the hammer spring. Time to learn how to take one of these things apart.


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PostPosted: Thu Apr 11, 2013 11:50 pm 
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Joined: Tue Jun 03, 2008 5:46 pm
Posts: 2815
Location: Canada
http://my.tbaytel.net/coopers/CrosMkI/review.html

Scroll down a little bit and you'll find a link to "dis assembly instructions".


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