This "short" size actuator is 11-3/4" long when compressed, has 2-1/2" of extension, and is suitable for short transom applications, or where the "standard" actuator height of 13-3/4" makes installation difficult.
Short size actuator bodies are identified by having only 3 rings at the lower end of the cylinder.
Short Actuators are not recommended for use on trim tabs with a span over 24", nor for performance applications.
Actuators are strong nylon and fiberglass hydraulic cylinders with piston-like arms that push the trim tabs into position and hold them there.
Hydraulic fluid is pumped in and out of the actuator cylinder via hydraulic tubing inside the boat which connects to a metal "through-transom" fitting that screws into a concealed connection port on the back of the upper (transom-mounted) actuator hinge - creating a "clean" appearance and eliminating hoses on the outside of the boat which could be subject to damage.
One of the unique features of the Bennett Trim Tab System is the use of concealed through-transom hydraulics. For the rare installation where the inside of the transom is completely inaccessible at the actuator installation point, and one of Bennett's standard actuators cannot be installed, an actuator is available with external ports, so the hydraulic hoses can be routed through the transom at a location where there is no obstruction. The external line connection actuator is recommended only when necessary. See Related Products, below.
Instructions for replacing an Actuator
Actuator blow-up diagram as well as examples and explanations for non-standard Actuator installations.