Have a marauder 177 with hill oversized gauge block huma reg transfer port drilled out don’t remember what size but every time I squeeze the trigger I get a popping sound of air and it is loud. Any ideas why this is accruing ?
Marauder making a popping noise out the hammer spring adjuster?
- Thread starter kzz1kaw
- Start date
Try checking the torque on the top receiver screws that clamp together the transfer port and sealing rings that are sandwiched between the receiver and air reservoir/valve tube.
Also make sure you haven't lost a breech o-ring.
Good luck
Also make sure you haven't lost a breech o-ring.
Good luck
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Breech o ring good and four Allen’s on top are tight. Is it supposed to blow out air in the hammer spring adjustment? Marauder is in a mad dog bullpup stock so it’s right next to my ear and I feel it’s louder than the pellet coming out the shrouded barrel
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If the breech O-rings is bad I would feel air around the magazine area or between the action and air cylinder?
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Give it the tissue test kzz. Droop it over the breach and fire a shot. See if it moves.
A.little air does make it around the valve stem and may feel a small puff. But not a pop.
A.little air does make it around the valve stem and may feel a small puff. But not a pop.
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I also agree that it is most likely the breach o-ring. When I had my M-rod I actually installed a bit of a tighter o-ring into the breach. Was very happy with the results. Just make sure that its not to small so you dont damage any pellets as they pass through.
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G
Guest
Guest
You will feel a puff from the back of the hammer spring adjustment. This is the air ahead of the hammer evacuating from behind when the hammer moves forward. If you want to have some fun run a string over the chrony normaly. Then plug that back hole tight and run the string again.
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is this normal for air to escape? You are the first to mention plugging the the hole! Never heard of this I’m taking you own a marauder. Did you experience the same thing? My chrony needs new lighting so I can’t test this out
what did you discover by plugging the hole? Do you know the size of the plug?Upvote 0
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Guest
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It was only a suggestion to run comparitive strings to understand whats going on and why it happens. But others like to spoil the fun
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Has anyone figured out what makes this noise? Cause I just got one today and stock configuration it is. IT WAS QUIET. Until after about several fills and all of a sudden I also get a Loud Pop. Any help would be appreciated, Thanks .
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Never mind, you guys were right about breech seal, mine some how walked on the bolt . Here is a picture 
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I must Say , I got it dirt cheap at cabelas in .25 and that Green Moutain barrel is pretty spot on . The stock scope is wishy-washy but with the right Optics this rifle can really stack it .
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I really like my Marauder in 25 cal. It was my first intro to pcp guns. Also have the Hill premium kit installed. I agree with you as it can truly hold its own if the shooter does his part.
i only wish JSAR would start inventory back up on their lightweight air tubes. I’ve heard the difference in weight is very noticeable.
i only wish JSAR would start inventory back up on their lightweight air tubes. I’ve heard the difference in weight is very noticeable.
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My friend shoots here with me once a week. While he was shooting his Armada, I commented to him that his gun was really loud. Didn't make sense because he shoots the Armada here quite often. To make a long story short, his breech o-ring was missing. Since I keep o-rings here for all my PCP's, I had the right o-ring and we were back in business in a few minutes.
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Checked and replaced breech o ring didn’t not make any difference checked the metering screw for leaks none. Rechecked the four Allen head receiver all are tight. The only thing I can think of since it has been a year since I shot it , my understanding is that there is supposed to be air escaping when fired. Since this marauder is in a bullpup stock I can hear and feel the air coming out. The marauder is a 177 huma regulated with a hill large hole gauge port and barrel transfer port drilled. Gets 90 shots 657 FPS es 50 sd 15 shooting jsb 13.43. The info was stored in my competition electronics chrony. Unfortunately I cannot retest at this time as I need new lights on my chrony so I cannot test again. But I did block the rear hammer hole and it is so much more quiet now and does not seem to affect the accuracy. Will take out to the range and test out to 50 for accuracy with the plug in and see what happens
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Plastic plugs are available to plug the hammer adjustment hole if it doesn’t affect accuracy, which is a surprise to me. Get your chronograph situation fixed and retest. What do you have for a hammer? A vented hammer would produce less air but there is still going to be some. When you move air in an enclosed tube it has to go somewhere. All the air noise from the valve through the TP and hammer venting is more pronounced with in a Mrod with a bullpup stock. BTW, as a last resort I would check your TP, but a tissue test should indicate a transfer port problem without pulling the breech off the air tube. Just my 2 cents.
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