Marauder Gen 2 power adjustment.

[MattR1267]

before i go adjusting the power on my marauder, I wanted to know if it comes tuned for maximum velocity from the factory. I read the manual and It didn't really specify if it was at max velocity out of the box. sry for the really basic question.
Thanks,
Matt

 

[LDP]

Generally no but they dont really have a consistent tune from the factory. Best to use a chronograph and tune it to what you want.

 

[Saltlake58]

Mine came tuned for about 830 fps using the .22 Crosman Premier Domes. The gun is capable of much more power, but that usually comes at the cost of accuracy and number of shots per fill. It's all a balance. I'm trying to tune mine now, for heavier pellets and better shot string.

 

[Crusher]

Best advice I can give you is, before you go changing things, Get the wrenches you need to adjust all the power settings. Get a pen and paper and count the turns on all 3 settings and write them down!! I wrote mine on the box it came in. Trust me. There WILL come a time when you say to yourself, man I wish I could set it back like it was from the factory.

Marauders come from the factory set to max power usually and they have what I call a descending power curve. That does give you max power for a few shots, but is no where even close to the best tune for the gun. What you want is a bell curve. (find this by testing on a chrono)
For example: My 177 came shooting 950's and got about 40 shots on a fill. I did a total of about 1 full turn CCW on the hammer spring and brought it down to about 900-905. That is the most accurate range for my 177 with 10.3 JSB's. The gun is quieter, more accurate and I get 90 shots per fill.

See what I mean?

Hope that helps

Crusher

 

[MattR1267]

"crusher75060"Best advice I can give you is, before you go changing things, Get the wrenches you need to adjust all the power settings. Get a pen and paper and count the turns on all 3 settings and write them down!! I wrote mine on the box it came in. Trust me. There WILL come a time when you say to yourself, man I wish I could set it back like it was from the factory.
Marauders come from the factory set to max power usually and they have what I call a descending power curve. That does give you max power for a few shots, but is no where even close to the best tune for the gun. What you want is a bell curve. (find this by testing on a chrono)
For example: My 177 came shooting 950's and got about 40 shots on a fill. I did a total of about 1 full turn CCW on the hammer spring and brought it down to about 900-905. That is the most accurate range for my 177 with 10.3 JSB's. The gun is quieter, more accurate and I get 90 shots per fill.
See what I mean?
Hope that helps
Crusher

It does. Thank you all

 

[Brazos]

I have tuned a handful of new marauders and all of them weren't tuned for crap from the factory. Get a chrono and start fresh. The main screw to watch is the hammer throw screw. It will change on you over time. So say you have your rifle tuned perfectly and the hammer throw is set 4 full turns out write that down. You will find the screw will screw itself back in. If you know how many turns out you can check it. On the marauders I have tuned we made shims for the hammer throw and it took care of the problem. Locktite did not work.

 

[MattR1267]

"Saltlake58"Mine came tuned for about 830 fps using the .22 Crosman Premier Domes. The gun is capable of much more power, but that usually comes at the cost of accuracy and number of shots per fill. It's all a balance. I'm trying to tune mine now, for heavier pellets and better shot string.

I think i get what your talking about. so for example i got H and N 15 grain pellets and obviously those are going to be shooting slower than the 10.5 grain pellets i usually shoot, so for me to get higher velocities with the 15 grain pellets i would turn the adjustment screw counterclockwise until I reach my desired velocity.

 

[Saltlake58]

"MattR1267"

"Saltlake58"Mine came tuned for about 830 fps using the .22 Crosman Premier Domes. The gun is capable of much more power, but that usually comes at the cost of accuracy and number of shots per fill. It's all a balance. I'm trying to tune mine now, for heavier pellets and better shot string.

I think i get what your talking about. so for example i got H and N 15 grain pellets and obviously those are going to be shooting slower than the 10.5 grain pellets i usually shoot, so for me to get higher velocities with the 15 grain pellets i would turn the adjustment screw counterclockwise until I reach my desired velocity.

I wish it was that simple. The Marauder has three possible adjustments. From the pellet weights you speak of, I'm assuming it's a .177.


Starting from fully counter-clockwise position, Crosman stated that the starting points for a .177 were:

Hammer Tension - 1.5 turns clockwise - Counter-Clockwise increases power. Clockwise decreases power.
Hammer Stroke - 5.5 turns clockwise - Clockwise increases power. Counter-clockwise decreases power.

Transfer Port - fully right or clockwise closes the port (you are just tightening a screw). Starting point is 2.125 turns counter-clockwise (Left). Counter-clockwise increases pressure by opening the port and clockwise closes the port for less power.

How's that for confusing?

The settings above are supposedly where Crosman ships from the factory. When I set my .22 to the factory specs for .22, it shot the Premier Domes 14.3 grain .22 pellets at about 830 fps, as they advertised. I suspect if you start with the settings above and 10.5 grain Crosman Premier Domes in .177, you'll get around 900 fps or a bit under. Only a chronograph can tell for sure. From the starting point, you can use trial and error to get the most efficient use of air at the velocity you want.

Download the manual from Crosman if you don't have one. The instructions do help.

Good luck, I'm still working on mine. Hope to have more time Saturday to do some chronograph work.

 

[MattR1267]

"Saltlake58"

"MattR1267"

"Saltlake58"Mine came tuned for about 830 fps using the .22 Crosman Premier Domes. The gun is capable of much more power, but that usually comes at the cost of accuracy and number of shots per fill. It's all a balance. I'm trying to tune mine now, for heavier pellets and better shot string.

I think i get what your talking about. so for example i got H and N 15 grain pellets and obviously those are going to be shooting slower than the 10.5 grain pellets i usually shoot, so for me to get higher velocities with the 15 grain pellets i would turn the adjustment screw counterclockwise until I reach my desired velocity.

I wish it was that simple. The Marauder has three possible adjustments. From the pellet weights you speak of, I'm assuming it's a .177.
Starting from fully counter-clockwise position, Crosman stated that the starting points for a .177 were:
Hammer Tension - 1.5 turns clockwise - Counter-Clockwise increases power. Clockwise decreases power.
Hammer Stroke - 5.5 turns clockwise - Clockwise increases power. Counter-clockwise decreases power.
Transfer Port - fully right or clockwise closes the port (you are just tightening a screw). Starting point is 2.125 turns counter-clockwise (Left). Counter-clockwise increases pressure by opening the port and clockwise closes the port for less power.
How's that for confusing?
The settings above are supposedly where Crosman ships from the factory. When I set my .22 to the factory specs for .22, it shot the Premier Domes 14.3 grain .22 pellets at about 830 fps, as they advertised. I suspect if you start with the settings above and 10.5 grain Crosman Premier Domes in .177, you'll get around 900 fps or a bit under. Only a chronograph can tell for sure. From the starting point, you can use trial and error to get the most efficient use of air at the velocity you want.
Download the manual from Crosman if you don't have one. The instructions do help.
Good luck, I'm still working on mine. Hope to have more time Saturday to do some chronograph work.

your dang right its confusing. My Chronograph is coming on Saturday so i'll have to play around with it than. thanks for your help.

 

[MattR1267]

"Saltlake58"

"MattR1267"

"Saltlake58"Mine came tuned for about 830 fps using the .22 Crosman Premier Domes. The gun is capable of much more power, but that usually comes at the cost of accuracy and number of shots per fill. It's all a balance. I'm trying to tune mine now, for heavier pellets and better shot string.

I think i get what your talking about. so for example i got H and N 15 grain pellets and obviously those are going to be shooting slower than the 10.5 grain pellets i usually shoot, so for me to get higher velocities with the 15 grain pellets i would turn the adjustment screw counterclockwise until I reach my desired velocity.

I wish it was that simple. The Marauder has three possible adjustments. From the pellet weights you speak of, I'm assuming it's a .177.
Starting from fully counter-clockwise position, Crosman stated that the starting points for a .177 were:
Hammer Tension - 1.5 turns clockwise - Counter-Clockwise increases power. Clockwise decreases power.
Hammer Stroke - 5.5 turns clockwise - Clockwise increases power. Counter-clockwise decreases power.
Transfer Port - fully right or clockwise closes the port (you are just tightening a screw). Starting point is 2.125 turns counter-clockwise (Left). Counter-clockwise increases pressure by opening the port and clockwise closes the port for less power.
How's that for confusing?
The settings above are supposedly where Crosman ships from the factory. When I set my .22 to the factory specs for .22, it shot the Premier Domes 14.3 grain .22 pellets at about 830 fps, as they advertised. I suspect if you start with the settings above and 10.5 grain Crosman Premier Domes in .177, you'll get around 900 fps or a bit under. Only a chronograph can tell for sure. From the starting point, you can use trial and error to get the most efficient use of air at the velocity you want.
Download the manual from Crosman if you don't have one. The instructions do help.
Good luck, I'm still working on mine. Hope to have more time Saturday to do some chronograph work.

your dang right its confusing. My Chronograph is coming on Saturday so i'll have to play around with it than. thanks for your help.

 

[Scrufhunter]

Hey Matt. I seen you were looking at using H&N 15grn pellets. Which pellet? I was wondering how Conicals work in the 177. I want to try the rabbit magnums but most people say they can't be loaded in the marauder mag

 

[Crusher]

Hey Matt.. PM sent

 

[MattR1267]

"Scrufhunter"Hey Matt. I seen you were looking at using H&N 15grn pellets. Which pellet? I was wondering how Conicals work in the 177. I want to try the rabbit magnums but most people say they can't be loaded in the marauder mag

Hey, yeah i'm using the rabbit magnums and they seem to fit without any problems.