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Chapter 5: Installing the ST4000+ 83
5 Installing the ST4000+
Securing the sensor to the boat
Location
Mount the rudder position sensor on a suitable base alongside the
rudder stock and tiller arm.
Note: If necessary, you can install the sensor upside down. If you
mount the sensor in this way, you must swap the red and green cable
connections at the control unit.
Securing the rudder position sensor
1. Hold the sensor in place, mark the mounting holes, then remove
the sensor (if required, use the template supplied).
2. Drill the pilot holes using a 3 mm (
1
/
8
in) drill bit.
3. Attach the sensor to the mounting base using the three
self-tapping screws supplied (pan-head No 8 x
3
/
4
inch).
Note: To make minor adjustments to the sensor alignment, loosen the
screws, rotate the sensor body, then re-tighten the screws.
Attaching the sensor to the tiller arm
Attaching the tiller pin to the tiller arm
1. For optimum performance, mount the tiller pin on the tiller arm
140 mm (5.5 in) from the rudder stock center line.
Note: If necessary, you can fit the tiller pin anywhere between
101 mm (4 in) and 190 mm (7.5 in) from the rudder stock. This will
not affect autopilot performance, but will slightly alter the scaling of
the rudder angle display shown on the control unit.
2. Hold the tiller pin in place (either along or across the tiller arm),
mark the mounting holes then remove the tiller pin.
3. Drill pilot holes using a 3 mm (
1
/
8
in) drill bit.
4. Attach the tiller pin to the tiller arm using the two self-tapping
screws supplied (countersunk No 8 x
3
/
4
inch) or suitable bolts,
nuts and lock washers.