Factory set pressure for regulator on 177 Marauder Field and Target

Forums PCP Airguns Factory set pressure for regulator on 177 Marauder Field and Target

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    cwcarrera
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    Does anyone know (definitively) what the factory pressure setting is for the regulator in the 177 Marauder Field and Target?  I called Crosman technical support but couldn't get a firm answer, just a guess.  Thanks, Chip.

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    vdwb
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    According to Crosman the Field and Target was a special run out of the custom shop for one of the big retailers. It was supposed to have a regulator that was bypass able for the field and regulated for target shooting although I think that the F&T is straight regulated.

    The specs. for the custom shop are 1000 FPS for the .177 Marauder regulated, 1100 FPS non reg.. I bet ackuric (member) knows off the top of his head or you can use his downloadable Performance Calculator found here on AGN.

    What did Crosman say, I’m guessing 124 bar (1800 psi) or maybe even lower? You don’t need a lot of FPE for targets.

    Dennis

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    Saltlake58
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    I do not know definitively but This video was done about 2 years ago.  If you can believe the marauder guage, it fell off the regulator about 1350 PSI and around 80 shots.  

     

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    cwcarrera
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    Saltlake58

    I do not know definitively but This video was done about 2 years ago.  If you can believe the marauder guage, it fell off the regulator about 1350 PSI and around 80 shots.  

     

     

     

     

    Yes, the testing I have done shooting it across the chronograph leads me to believe the regulator is set right around 1350.  I was really disappointed in the level of knowledge available when I called Crosman customer support.  The lady I talked to was 0 for 5 on the questions I had which were all simple factory setting questions.  More irritating is it didn't matter how many times I asked nicely to be transferred to someone who might have more knowledge about this particular model, she refused to let me talk to anybody else.  Very disappointing interaction with Crosman customer service!

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    rong1966
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    I asked the same question on another forum and the person that answered said 2050 psi.  He later revealed himself in other posts to be an engineer at Crosman.  For what it's worth, my velocity drops at 1800 psi.

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    cwcarrera
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    rong1966

    I asked the same question on another forum and the person that answered said 2050 psi.  He later revealed himself in other posts to be an engineer at Crosman.  For what it's worth, my velocity drops at 1800 psi.

    Ron,

    I had another conversation with a different person at Crosman customer support this morning and got all my questions answered.  This person (Kevin) was VERY helpful and had lots of advice for me.  He also told me that the 177 Marauder was regulated at 2050 PSI.  While I don't want to say that 2050 is wrong, I have shot my gun from a full 3000 PSI fill down to where it stopped shooting within a 20 fps extreme spread (on the slow end) and I am having difficulty believing the 2050 number.  My gun shoots consistent velocity right down to between 1350 and 1400 PSI before it shows any velocity fall off trend.  My chronograph (Chrony Beta Master) only stores 60 shots so I don't have a good count of how many shots there was when the gun 'fell off' the regulator, but it was more than 60 because the chronograph was complaining about being 'full' well before my string was complete.  Chip

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    cwcarrera
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    Member

    I should probably post this since I'm sure there will be other people looking for this information in the future.  These are the 'factory settings' for a 177 Marauder Field and Target (regulated) according to Crosman customer service.  Direct copy and paste from the Email I got from them…

     

    Thank you for contacting Crosman.

    Unfortunately the regulator in your Marauder should not be adjusted by the customer. Digging deep enough into the gun to get at it would void your warranty.

    The gun should also not be fired under 2000PSI, or you will experience increased accuracy issues.

    Here is the available information you asked for according to our engineer.

    Striker (hammer stroke) at 12 turns in.
    Hammer spring preload at 6 turns in
    Valve screw 4 turns out
    Reg setting at 2050 PSI.

    I do advise against adjusting any setting other than the hammer spring.

     

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    rong1966
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    Chip,

    I was at shot 96 when I noticed that velocity dropped at 1800 psi.  

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    Saltlake58
    Participant
    Member

    Those numbers just don

    cwcarrera

    I should probably post this since I'm sure there will be other people looking for this information in the future.  These are the 'factory settings' for a 177 Marauder Field and Target (regulated) according to Crosman customer service.  Direct copy and paste from the Email I got from them…

     

    Thank you for contacting Crosman.

    Unfortunately the regulator in your Marauder should not be adjusted by the customer. Digging deep enough into the gun to get at it would void your warranty.

    The gun should also not be fired under 2000PSI, or you will experience increased accuracy issues.

    Here is the available information you asked for according to our engineer.

    Striker (hammer stroke) at 12 turns in.
    Hammer spring preload at 6 turns in
    Valve screw 4 turns out
    Reg setting at 2050 PSI.

    I do advise against adjusting any setting other than the hammer spring.

     

    those numbers just don't look right.  My unregulated gun shoots perfectly till about 1800 PSI (if you can believe the gauge).  Settings look like an extremely small plenum and all of the air empties out on every shot.  Those settings are FULL OPEN on the gun.  Maximum spring and striker, and max valve screw.  The .25 isn't that wide open.  Very interesting if that's what it's really set up like.  I'm adding a regulator to my Marauder now, and will be testing (hopefully) this weekend.  It has a large plenum so if I use these settings, I'll waste a ton of air.  Interesting, all interesting.

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    vdwb
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    I would like to regulate the wife’s.177 marauder so I will keep an eye on this topic. Very interesting and useful info so far, thanks to all the members for their input.

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    cwcarrera
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    Saltlake,

    I can tell you that the numbers from Crosman for hammer spring, hammer stroke, and valve screw are exactly what my gun was set at from the factory.  Remember that this gun comes from the factory with the regulator, so we have no idea if the other internal parts are the same as an un-regulated Marauder.  It could be that it comes with a lighter hammer?  Lighter hammer spring?  Different poppet valve?  We don't know because there is no parts list for the Field and Target model available on the Crosman website.  We just don't know…  Chip

     

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    Saltlake58
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    cwcarrera

    Saltlake,

    I can tell you that the numbers from Crosman for hammer spring, hammer stroke, and valve screw are exactly what my gun was set at from the factory.  Remember that this gun comes from the factory with the regulator, so we have no idea if the other internal parts are the same as an un-regulated Marauder.  It could be that it comes with a lighter hammer?  Lighter hammer spring?  Different poppet valve?  We don't know because there is no parts list for the Field and Target model available on the Crosman website.  We just don't know…  Chip

     

    You are right, we simply don't know.  And for that matter, early guns like the one in the video could be setup differently from current production guns.  We just don't know.

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