Marauder Problems

Forums PCP Airguns Marauder Problems

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    protojoe
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    I'm the new owner a regulated Benjamin Marauder in .177.  It's my first PCP and really my first decent air rifle so don't be afraid to tell me that I'm too stupid to own an air rifle and need to change to another hobby!

    I can't go through a single magazine without failing to be able to load at least one pellet.  It's never smooth pushing the bolt back through but often it really sticks.  I wiggle it a little and sometimes it will go ahead and push through and sometimes it just won't.  I'm afraid to really hit hard on it.  I usually wind up pulling the bolt back to try to take the magazine out but that rotates the magazine so I wind up with two pellets stacked.  

    Is it the gun, the magazine or me?  Any help would be appreciated.

    Thanks,

    Joe

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    W4c
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    It's been years since I had mrod, but I remember having similar issues. If I remember correctly bolt # 25 in this diagram got loose and caused that. Maybe worth to check.

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    davecole
    Participant
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    Does it do it with the magazine out? If so, the problem could be one or two things. (I believe )

    One-

    The “grease” used in this area during assembly for what ever reason will turn to a consistently and the feel of sap. 

    Two-

    there is a adjustment screw on top and at the back of the breech. This screw hold tension on the bolt to keep it from flopping around during operation. If you feel the need to adjust this, do so with very little movement. 

    What I recommend is to take the breech off to access the bolt and the area the bolt slides through. Give it a through cleaning and a light lubing with a quality moly grease.

    If you need detailed help on removing the breech, PM me and we’ll set up a time to go over it. 

     

     

    Pull back on the bolt and hold it open. Does your bolt feel sticky at all? If so you can try spraying a gun suitable solvent in and around the bolt while working it back and forth and around. 

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    ackuric
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    When cocking always listen for 2 clicks, one from the magazine, other from hammer engaging sear, then close bolt and lock down. Double loading should only be an issue if you're not engaging the sear properly upon cocking the rifle, if when this does occur simply ensure proper engagement on second attempt while removing the mag before closing bolt to prevent a double load.

     

    -Matt

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    JKaplanwit
    Participant
    Member

    Same here.  I've had mine for 6 months and the problem is getting worse.  I have 5 magazines and a number of different brands, weights, and shapes of pellets and it happens in any combo.  I tried a bit of grease on the bolt, as someone suggested, but not much help.  I tried the screw on top as suggested by Benjamin Help, (#24 on the diagram, I believe), but only a slight change. 

    The only other thing I can see is that the magazine slides to the left too far as I insert it.  I tried to pull it back a hair to get better alignment and that seemed to help, but it's not really a "fix".

    Can't wait to see if someone here has a fix for it.  Thanks.

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    Deleted Account

    I have three Gen I Marauders in all three calibers.

    Never..Never a problem..

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    likkitysplyt
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    Member

    I have a .22 and a .25 cal 2nd Generation Marauder and had some issues but they got worked out pretty darn well with loosening the screw on top at the rear of the breech, a good coating of moly lube on the bolt and making sure that bolt was all the way back as far as it would go and holding it for a second before pushing forward. If the bolt is not all the way back and held for a second before pushing forward, I would get the same issues you are describing.

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    joelayfield
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    is it the pellet pushing into the breech that gets hung up or feels bad?

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    joelayfield
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    also maybe the magazine has issues, things not lining up correctly.  if  you hand load (single feed) and the pellet loads good and smooth, possibly just the magazine

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    Keyman62421
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    Just a question!  Are you positive you don't get a pellet in the magazine backwards from time to time?🤔

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    Crusher
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    Is it smooth with the mag out?  I've had bolt #23 be a little tight and it will cause what you are describing. That bolt doesn't need to be tight. Just turn it in until you can feel it effecting the drag on the bolt.  

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    willy
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    Welcome to the airgun world"next.

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    protojoe
    Participant
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    Great responses, thanks.  I've done some testing.  Works fine without a pellet.  Smooth movement, just like I think it should feel.  I tried inserting a single pellet without the magazine and that didn't feel right.  When pushing the pellet into the breech it sticks and takes more force than I think it should to push it in and then kind of snaps home.  I tried a couple of different pellets (good quality).  This happens with about 3/8" of the bolt away from being fully closing.  I thought maybe I'd do a bunch of pellets like that to see if it would smooth it out.  Some were better than other but then I came to one that just wouldn't go.  I don't know if I could have forced it a little harder and got it to go in but I know that's not right.  It did fall out so it's not lodged in there but something just isn't right.  

    Is the sticking and breaking loose normal or is that just a lesser indication of the problem?

    I guess the only option is to return it to Crosman?  Any home remedies?  I could grease it a little but don't think that's all it needs.

    Thanks.

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    shoot44
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    So can you load a single pellet then using a cleaning rod push it back out and see if the pellet is scratched or deformed? Might have a burr or something in there.

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    Eaglebeak
    Participant
    Member

    There was a guy on here a few days ago that had the same problem as well as a really tight choke on his new F. T model with the Croman barrel 177 barrel. I think he deburred and polished it and got it shooting OK but wasn't really happy with it and was asking if the L.W barrel was worth the extra dosh. You might want to check that thread out before you send it back.

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    spysir
    Participant
    Member

    Description of single loading sound like a poor lead/transfer port urr or such which is likely scraping off & maye in your case building up more crud as pellets go by. 

    Warranty?  

     Easy top pull the barrel and inspect it.

     

    John

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    Bigragu
    Participant
    Member

    Sounds like a burr in the transfer port to me. Did you buy this gun new or used? You say you’re a new owner, and I’m taking that as this is your first ever pcp gun and you possibly bought it used? If so, the previous owner probably put in a larger transfer port and did the recommended transfer port enlarging but didn’t debur properly after the drilling. Something is catching on the pellet as it passes thru. If it’s a new gun I would still suspect this as it came that way from the factory, un deburred.

    also, if you find the cocking hard, or feels like it’s scraping, the channels inside in both the pressure pipe and receiver that the hammer and bolt lugs ride on should be deburred with a polishing ball on a Dremel or drill, then apply some moly paste along these channel edges. On my Marauder pistol I noticed the bolt  lug on the receiver was starting to form a hex flat instead of remaining round as it came, and saw that it was scraping against the channel slot. I took a polishing ball bit along with a jewelers file to the channels sides and that cured all that. Cocks really smooth now.

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    Jonah
    Participant
    Member

    Hold the magazine in your hand and use a tooth pick or pencil and push each pellet out of the magazine on to your bench.  Does inch pellet seem to push out easier?  If not, is the wheel inside the magazine rotating freely?  If it doesn't rotate freely, loosen the screw in the magazine very slightly and try again.  Google Marauder magazine repair.  I believe I remember Hisamoto had a video on magazine breaking for either the Marauder or the Gauntlet whose magazine is made the same as the Marauder.  Hope this will help.

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    protojoe
    Participant
    Member

    Looks like we may have a solution. After describing the problem and sending a photo to Crosman (where I bought the gun) they say that I am missing the breech o-ring.  The pellet is getting stuck in the groove where that o-ring should have been.  They are sending an o-ring 

    I guess this is okay.  I don't really like the fact that I'm going to have to work on my new gun myself instead of just returning it but I wasn't looking forward to the hassle of mailing it either.  I'm pretty much a klutz when it comes to mechanical repairs of any kind.  

    How hard is installing this o-ring?

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    Jonah
    Participant
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    Its not hard to install the barrel o-ring without disassembling.  Pinch the o-ring and insert into the barrel groove at an angle and you can get the o-ring pushed on into place.  A little silicone grease or Pellgun oil will help it slide into place.

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