16
W W W . D Y E P A I N T B A L L . C O M
FL-21™ ENGINE OPERATION
To achieve top performance from your M3s, it is important to understand the basic
operation of the M3s’ F-21™ engine.
The design consists of 2 independently moving parts; the bolt and the valve.
The F-21 engine has 5 components:
1
Cylinder
2
Bolt
3
Valve Core
4
Top Hat
5
Valve Can
The air used to cycle the bolt is supplied to the front of the bolt sail through the holes at
the front of the cylinder. To fire, this air is vented and air is added behind the second seal
on the cylinder which pushes on the back of the bolt sail to drive it forward.
The F-21’s valve system is the most advanced on the market. Air is supplied from the
regulator through the holes in the valve can to the back of the valve sail. Air is selectively
supplied to the shot chamber through the solenoid. Upon firing, the shot chamber
provides air to fire the ball. When it drops below the designed pressure, the pressure
behind the valve sail drives the valve forward trapping air in the shot chamber. This highly
advanced system is self-tuning, the board dwell setting should not need adjusted under
normal circumstances.
NOTE: LOW OR ERRATIC VELOCITY MAY BE DUE TO A LOW BATTERY NOT
SUPPLYING AMPLE ELECTRICAL CURRENT TO THE SOLENOID. IN THIS CASE,
CHARGE THE BATTERY.
FL-21
™
ENGINE ASSEMBLY AND MAINTENANCE
WHEN SERVICING YOUR MARKER:
• MAKE SURE YOUR HOPPER IS REMOVED FROM THE M3S.
• MAKE SURE THERE ARE NO PAINTBALLS IN THE BREACH OF THE M3S.
• ALWAYS REMOVE THE AIR SUPPLY AND RELIEVE ALL GAS PRESSURE IN THE
M3S BEFORE DISASSEMBLY.
• WHEN USING THE MARKER IN TEMPERATURES BELOW 50° FAHRENHEIT IT MAY
BE NECESSARY TO LUBE THE FL-21™ BOLT MORE FREQUENTLY.
• THE M3S CAN HOLD A SMALL RESIDUAL CHARGE OF GAS, AFTER THE AIR
SUPPLY HAS BEEN REMOVED. ALWAYS DISCHARGE THE MARKER IN A SAFE
DIRECTION TO RELIEVE THIS RESIDUAL GAS PRESSURE.
4
5
3
2
1
