Service Manual 115-200 HP E-TEC Trim And Tilt [Electrical Circuit Tests]

Remove the manual release valve. Install pressure gauge and adapter “B” to check problems in the DOWN circuit. Cycle the unit down and up several times to purge air. With all rods fully extended, run the unit down momentarily to reduce pressure. Check fluid level again, and add fluid if necessary. Remember that all rods must be completely extended to check fluid level.

Starting with the tilt cylinder fully extended, run the unit DOWN.

• The gauge should show 0 to 200 psi (0 to 1379 kPa) as the tilt cylinder is retracting.
• The gauge should show approximately 800 psi (5516 kPa) as the unit stalls.
• Release the switch and watch for a pressure drop. The stall pressure reading must not drop more than 200 psi (1379 kPa) after motor stops. If results vary from the above limits, there is a problem in the DOWN circuit. Refer to MODES OF OPERATION(Three Piston System) on p. 371 for circuit description.

After tests are complete, run the unit up, then down momentarily. Cycle the unit down and up several times to purge air. With all rods fully extended, run the unit down momentarily to reduce pressure.

Check fluid level again and add fluid, if necessary..

Relay Testing

When the trim-UP button is pressed, the UP relay is energized and connects the blue trim motor wire to the battery positive (+) terminal. The green trim motor wire remains grounded. When the but ton is released, the blue trim motor wire returns to a grounded position.

When the trim-DOWN button is pressed, the DOWN relay is energized and connects the green trim motor wire to the battery positive (+) terminal. The blue motor wire remains grounded. When the button is released, the green trim motor wire returns to a grounded position.

Refer to TILT/TRIM RELAY TEST on p. 156 for relay testing procedure.

Trim and Tilt Motor Current Draw Tests

Careful analysis of the electric motor's current draw and trim/tilt unit operating speed aids evaluation of the electric motor and certain mechanical components.

Use a battery rated at 360 CCA (50 Ah) or higher that is in good condition and fully charged to per form this test.

IMPORTANT: Specifications are for static hydraulic tests. DO NOT attempt to perform the following tests while the boat is moving.

Connect a 0 to 100 A DC ammeter in series between the battery side of the starter solenoid and the red lead to the trim/tilt relay module.

005441

1. Red lead

Observe ammeter and a stopwatch while running hydraulic unit through several complete cycles. Compare test results to the values listed:

Three piston system

Single piston system

Test results include three basic possibilities:

A. Low current draw – Check for:

• Valves leaking
• Pump damaged
• O-rings leaking
• Manual release valve damaged
• Relief valve springs weak
• Check valves fouled or damaged

B. High current draw – Check for:

• Pump binding
• Motor binding
• Cylinder binding
• Valves sticking

C. Normal current draw, slow operating speed – Check for:

• Manual release valve damaged
• Impact valves damaged
• Check valve or shuttle valve malfunctioning

Trim and Tilt Motor No Load Test

IMPORTANT: Securely fasten motor in a suit able fixture before proceeding with this test.

Use a battery rated at 360 CCA (50 Ah) or higher that is in good condition and fully charged to per form this test.

Connect a 0 to 50 A ammeter in series with the battery positive (+) terminal, ammeter red lead toward battery.

Attach or hold a vibration or mechanical tachometer to the motor while performing this test.

Monitor motor RPM and current draw.

30957

The motor shaft must rotate clockwise, as viewed from the pump end, when positive (+) is applied to the blue lead, and negative (–) is connected to green lead.

The motor shaft must rotate counterclockwise, as viewed from the pump end, when positive (+) is applied to the green lead, and negative (–) is applied to the blue lead.

DR4238r

If test results vary, replace the motor.

TRIM AND TILT

Trim Gauge Test
STEP 1

Turn key switch ON. Using a voltmeter, check for voltage between the trim gauge “I” and “G” terminals.

• If no voltage, check condition of instrument harness, key switch, and engine 20 A fuse.
• If voltage, go to STEP 2.

STEP 2

Remove the white/tan lead from the trim gauge “S” terminal. With key switch ON, gauge should indicate full-trim DOWN position. Now connect a jumper wire between terminals “S” and “G.” Gauge should indicate full-trim UP position.

• If results are different, replace the trim gauge.
• If results agree, refer to Trim Sender Test on p. 384.

Trim Sender Test

IMPORTANT: To avoid immediate meter dam age, never apply a multimeter to an electrical circuit where voltage is present.

Disconnect the 3-pin connector between the instrument harness and engine trim harness.

Connect an ohmmeter between the white/tan wire, terminal “C,” of the engine harness and a clean engine ground.

With the outboard fully DOWN, meter must show a reading above 80 Ω.

With the outboard fully UP, meter must show a reading below 10 Ω.

• If results agree, refer to Trim Gauge Test on p. 383.
• If results are different, replace trim sender.

DRC6247

TRIM AND TILT SERVICE

Removal

Raise the outboard and engage the tilt support.

Remove the rubber grommet from the blue/green trim/tilt cable connector.

000686
Remove the terminals from the connector by using a suitable tool to depress the tab. While the tab is depressed, pull on the wire from the rear of the connector to release it from the connector.

000687