Owner's Manual

To increase the energy, turn the hammer spring preload adjuster clockwise (fig 11A), up to 6 revolutions,
using a ¼” Allen wrench.
NOTE: More revolutions will simply cause the adjuster to spin but will
not yield any higher force. Increasing the preload will be required to
facilitate use of higher fill pressures.
The striker can be accessed through the hammer spring preload
adjuster using a 1/8” Allen wrench (fig 11B). Turning the striker
clockwise will shorten the hammer stroke and turning counter
clockwise will lengthen the stroke. A long stroke length will yield
higher hammer energy while a short stroke length will yield lower
hammer energy. The striker can be adjusted inward by up to 12
revolutions.
A starting point for low fill pressures would start with a low hammer
spring preload tension and a shorter hammer stroke.
A starting point for higher fill pressures will require more hammer
spring preload tension and a longer hammer stroke. Refer to the
chart below for suggested combinations of these adjustments based
on fill pressures.
Fill
Pressure
Hammer Spring Preload Hammer Stroke
Higher Increase, turn adjuster in (Clockwise) Increase. Turn Striker out (Counter Clockwise)
Lower
Decrease, turn Adjuster out (Counter
Clockwise)
Decrease. Turn Striker in (Clockwise)
TIP: Too little hammer energy at high fill pressures may result in very low velocities which is the result
of partial valve lock. See the Overfill section (3C) to correct. Make only the adjustments identified in this
manual. Do not attempt to adjust any other parts of a pressurized airgun, or make any repairs to a
pressurized airgun.
Tuning the air rifle to obtain various velocity profiles can be achieved through the adjustment of the hammer
spring and the striker and should be done in harmony with each other. Start slow to understand how each
one affects the air rifle’s performance. Experience and testing is the best way to understand these capabilities.
WARNING:
Do not attempt to repair the airgun or to disassemble to correct an over
fill or valve lock. Never repair a pressurized gun. Parts can fly from the airgun at dangerous
speeds when it is disassembled while pressurized.
C. Tuning for Various Velocities
The Marauder air rifle has been factory set to an efficient velocity that
will suit most hunting and target uses. If you, as the owner, wish to
alter the factory settings you should do so only after reading the fol-
lowing instructions carefully. Unless you are experienced with work-
ing with airguns, Crosman Corporation suggests seeking the aid of a
qualified gunsmith to perform these velocity adjustment procedures.
Put the air rifle “ON SAFE”, remove the clip and keep the airgun
pointed in a SAFE DIRECTION. Remember that the airgun is pressur-
ized and make only the adjustments identified in this manual.
The Marauder may be tuned for various velocities by adjusting the
valve metering screw. This will require removal of the stock. Remove
the stock screw (Fig 12) (using a 3/16” Allen wrench to separate the
stock from the action. Remember the action is pressurized. Keep it
pointed in a safe direction.
Do not remove the trigger guard screws as the trigger guard
should remain with the stock.
Using a 5/64” Allen wrench, remove the jam set screw first to allow access to the metering screw. (fig 13)
(Be sure to stow the jam set screw in a safe place). Find the metering screw beneath the jam set screw
previously removed. Using a 5/64” Allen wrench turn the metering screw clockwise to restrict the flow of air
into the barrel and reduce the pellet velocity.
11A
Adjusting the
Hammer Spring
11B
Adjusting the Striker
Hammer Spring
Pre-load adjuster
11B
12
13
TIP: Turn the metering screw in all the way until it bottoms, counting how many turns it took to achieve the
desired velocity. Record this value for future reference. 4 - 41/2 turns out from the bottomed position will
completely clear the nose of the metering screw from the air path. Do not adjust the metering screw be-
yond this point. Though the metering screw will restrict air flow a great deal it will not completely shut off air
flow. For use with CO
2
it is recommended to use a more open setting (metering screw out to clear air path)
Replace and tighten the jam screw. Re-insert the action into the stock, and replace and tighten the stock screw.
11. Reviewing Safety
Never point the airgun at any person or at anything you do not intend to shoot.•
Always treat the airgun as though it is loaded and with the same respect you would a firearm.•
Always aim in a SAFE DIRECTION. Always keep the muzzle of the airgun pointed in a SAFE DIRECTION.•
Always keep the airgun on safe until you are ready to shoot.•
Always check to see if the airgun is “ON SAFE” (see section 2A) and unloaded when getting it from •
another person or from storage.
Always keep your finger off the trigger and out of the trigger guard until ready to shoot.•
You and others with you should always wear shooting glasses to protect your eyes.•
If your reading or prescription glasses are not safety glasses, make sure you wear shooting glasses •
over your regular glasses.
Use .177 caliber (4.5mm) pellets only in your Model BP1763 or use .22 caliber (5.5mm) pellet only in •
your Model BP2263. NEVER reuse ammunition.
Do not shoot at hard surfaces or at the surface of water. The pellet may bounce off or ricochet and hit •
someone or something you had not intended to hit.
Place the backstop in a location that will be safe should the backstop fail.•
Your backstop should be checked for wear before and after each use. All backstops are subject to wear •
and will eventually fail. Replace your backstop if the surface is worn or damaged or if a ricochet occurs.
Do not attempt to disassemble or tamper with your airgun. Use an Authorized Service Station. Using •
unauthorized repair centers or modifying the function of your airgun in any way may be unsafe and will
void your warranty.
Store airgun in a secure location. •
Before you store your airgun, remove the clip, make sure there is no pellet in the chamber and make •
sure the gun is un- cocked (see section 6).
Store this airgun charged with air or CO•
2
to keep the valves closed against dirt.
Whenever you store the airgun, make sure it is “ON SAFE” (see section 2A.)•
This airgun has been classified as an adult airgun, and is recommended for adult use only.
Because it is considered to be a special-purpose airgun, it is exempt from specific types of
trigger pull, safety mechanism and drop tests.
SPECIFICATIONS
Mechanism
Bolt Action
Capacity
10 Shot Clip
Power source
Compressed Air Or Co
2
(One Or The Other)
Caliber/Ammunition
Model BP1763 .177 Caliber Pellet
Model BP2263 .22 Caliber Pellet
Weight
7 Lb 8 Oz.
Length
43 Inches
Barrel
Air Rifled Steel, Choked
Safety
Ambidextrous Lever
Velocity
Model BP1763 Adjustable Up To 1100 Fps
Model BP2263 Adjustable Up To 1000 Fps
8 9