Check out the Assembly Video for this cylinder on my YouTube Channel. 
 
NOTE: This product line has been discontinued in favor of our new 255 Series units, which will be open for orders Sept 14th, 2024. Thank you for your patience while we re-tool and set up for this awesome new product line. 
 
The 250 Series SubDriver has been designed by the Nautilus Drydocks to incorporate maximum flexibility and ease of assembly, maintenance and upgrade. It is the smaller version of the 300 Series unit, and measures 2.5" in outside diameter, perfect for any boat with a beam larger than 3.5".

250 Series SubDriver V2 Features: 
2.5" diameter electronics and battery compartments
High strength plastic tubing
High strength bulkheads
Gas backup sub-system
Low friction cup-style linkage seals with easy maintenance and replacement
Metal gear servos for maximum torque and throw
Two forward and two aft linkage outputs (rudder, rear planes, forward planes, spare)
Single high-torque brushless motor power
Optional dual shaft gearbox
High capacity air pump
Air ballast means the FULL capacity of the ballast tank is utilized, unlike pressure ballast systems
Compartment lengths can easily be re-sized to suit nearly any boat of adequate beam
 
NOTE: These units are built to order. Please allow 4 to 6 weeks for shipping.
 
These cylinders ship fully assembled and tested for linkage and motor actuation as well as cylinder watertight integrity. Each one is certified prior to shipping. Some final installation of components such as radio gear, pitch controller, failsafe, remote switches, etc will be required on behalf of the builder.  
 
Cylinder Length: 
16.5" plus ballast tank length (IE: a cylinder with an 8" tank would measure approximately 26" OAL)
 
Cylinder Package includes: 
Forward Battery bulkhead with seals and servos installed and tested
Battery Equipment Tray
Rear Battery bulkhead
Pump Bulkhead with air pump, pump controller, ballast servo, vent linkage and seals installed and tested
Motor Bulkhead with seals, servos, motor, ESC installed and tested
Optional dual shaft gearbox
4 sets of magnetic linkage connectors
Main power cable
4 sets of servo extensions
2 sets of power distribution clips
Power connector for battery connection
15A fuse and fuse holder
2 easy solder heat shrink tubes
2 wire clips for cable organization
Spare seals for tubes and linkage seals
BEC (Battery Eliminator Circuit) for receiver
 
Optional Accessories available from the electronics section of our store:
Heavy Duty remote on/off switch
AD2 pitch controller
BLM failsafe
 
All Nautilus Drydocks cylinders come certified for operation of all linkages and motors and for watertight integrity.