Power Trim and Tilt: 2B-1
Mid Unit
Power Trim and Tilt
Precautions
Precaution for Power Trim and Tilt
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WARNING
!
Before removing the PTT unit, the motor should be fully supported to prevent personal injury.
CAUTION
• To prevent system malfunctions, ensure that all components are kept free from dirt or
contamination.
• To unscrew the trim / tilt cylinder head, use only the special cylinder cap tool.
• Pull rams out by hand; do not attempt to leverage with a screwdriver blade etc.
NOTE
Reinstall all O-rings, seals, springs etc. with the component(s) to which they belong. This will prevent
possible confusion and will ensure correct reassembly.
General Description
Power Trim and Tilt Description
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• The power trim and tilt system components are an electric motor, a pump unit, a fluid reservoir and one tilt cylinder.
The outboard can be trimmed “UP” or “DOWN” while under way, and can be tilted for beaching, operating in shallow
water or trailering.
Trim and tilt “UP” or “DOWN” is obtained by supplying power to a permanent magnet type motor. This motor will
rotate clockwise for “UP” or counterclockwise for “DOWN”, according to power delivered via the PTT relay, which is
mounted on the electric part holder.
• The PTT relay is controlled by the ECM.
The ON/OFF signal for the PTT UP or DOWN is inputted to the ECM PTT relay drive circuit from ECM terminals No.
22 or 23 and the output signal from terminals No. 3 or 27.
NOTE
• A PTT relay control circuit has been added to the ECM for the tilt/trim function.
The PTT switch is powered by the main battery, the same as other models, but battery voltage must
also be supplied to the ECM by the sub battery cable for the system to operate.
• With the ignition switch in the OFF position, and the PTT switch operated, the tilt/trim will operate.
With the ignition switch in the OFF position, operating the PTT switch will supply a 12 V power
signal to the ECM.
When this signal is received, the ECM operates the main relay (ON), allowing the ECM drive signal to
feedback to the ECM and the PTT relay circuit.
Thus the PTT system functions only if the PTT switch is operated.
When the PTT switch signal turns from ON to OFF and a predetermined time has elapsed, the ECM
drive voltage will be interrupted automatically.
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