the liquid between the blades is continuously squeezed out into the discharge port by a cam located inside the pumping chamber

black aluminum bezel

Lockand-hold function for easy docking

AUTOMATIC FREE FALL CONTROL

9004301 is made of 316 Stainless Steel with a 3/4" male garden hose end

Stern Tunnel, Composite, ready bored, w/extension Perko the liquid between the bladesTwo Piece Composite Stern Tunnel for SE130, SE170 SE210 and SH240 (250mm tunnel thrusters), ready bored, with extension harness for control box New 2 Piece Stern Tunnel makes installation even easier! Integrated support struts eliminate the need for a separate support for the motor Larger cut out diameter (350mm) makes it possible to install a completely assembled SE130 or SE170 stern thruster from the outside The tunnel comes in two halves that snap