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I replaced the piston in my yong heng since it wouldn't get over 250 bar when filling my tank. With the new piston the compressor shuts off near 250 bar. The breaker is not tripping and I don't have an auto shutoff model. What can I check?

I've had my Revere for 6 months now and about a month ago the cocking lever started to pop open after firing a shot. The screw where it pivots was loose and after tightening it the lever would stay closed after a shot. It is doing it again, and I have tightened the screw again. Has anyone...

My Yong Heng has developed a leak at the burst disc plug. I have changed the burst disc and tightened the plug, but air leaks from it. I used teflon tape as a temporary fix, but is there supposed to be a white washer/seal in the aluminum block where the brass plug screws into?

Does the .177 LW Marauder barrel from Crosman use a different o ring than the OEM barrel?

My .177 Marauder Field and Target has been in a funk for the last year or so. Velocity used to be pretty consistent, usually within 5 fps between shots; that has increased to 15 or more. Shot groups have become inconsistent as well. I suspected it might be the regulator so I replaced the...

I replaced the Crosmann regulator in my Marauder F&T .177 with the Huma version and the velocity is all over the place. I had a couple of shots in the 930's followed up by one in the mid 500's and then one in the 750's. I also had one over 1400 fps I have the regulator set at 140 bar which is...

The regulator in my Marauder F&T failed (leaked) last year and Crosman sent a replacement. The new regulator is not as consistent as the original so I'd like to repair the old one and use it. I can see that the internal o-ring was badly stretched and deformed so I assume that the leak is from...

How tight should the shroud of a marauder be over the o-ring of the air stripper? Mine doesn't fit tight at all, and I believe that it was a lot tighter when the rifle was new. I am having accuracy issues and am trying to troubleshoot.

My marauder ft has a slow leak and is losing 2-300 psi overnight. I first used a soapy water solution on the fill area and gauge area but found no bubbles. I removed the trigger and hammer and dunked the airtube into a sink with water and found one small bubble every few seconds where the fill...

Can anyone recommend a side wheel for the Aim alpha 6 4.5-27? I bought it to try at field target and the UTG wheel that I have won't fit mainly because of the illumination knob which sticks out from the parallax knob.

I shoot open division with a Vector Sentinel 10-40x50 scope and am having trouble with reliably ranging especially at longer distances. I have used a UTG 100 mm wheel and now a custom comma wheel, but I have difficulty with my scope being in focus every time at the same point on the wheel. For...

I was having an issue with my .177 marauder field and target with the velocity increasing over the time I have owned it, over a year. I could not lower the velocity with adjusting the hammer spring, so I looked at the hammer stroke adjustment. One of the forum members contacted Crosman for the...

I was fooling with the hammer spring adjuster on my .177 marauder field and target yesterday to reduce the velocity which has crept up since I got the rifle over a year ago. Out of the box it was shooting AA 10.3's at 895 fps and more recently it was shooting at 915 fps. I reduced the hammer...

I've had my Marauder F&T for a year now and sometimes the sear won't engage when the bolt is pulled back. I'll pull back the bolt and it won't lock. I disengaged the lawyer spring when I first got it and adjusted the trigger weight and the first and second stage screws. This started about a...

Halfway through this morning's field target match I noticed that air was leaking in my marauder field and target when I opened the bolt to load a pellet. One of the more knowledgeable members said that there might be some junk caught in the valve and to shoot the rifle a couple of times to see...