Single Piston System; Electrical Circuit Tests; Relay Testing; Trim And Tilt Motor Current Draw Tests - Evinrude E-TEC E115DPLSCR Service Manual

Single Piston System

Use the following guidelines to check a single pis-
ton trim/tilt unit that is not working correctly.
Cylinder Leakdown:
Manual release valve seals
•
External leaks
•
No reverse lock:
External leaks
•
No operation, motor runs:
Manual release valve open
•
Fluid level low
•
Pump coupler
•
Hydraulic pump
•
No tilt down:
Manual release valve
•
Fluid level
•
Slow performance:
Manual release valve
•
Fluid level low
•
Mechanical binding
•
Electric motor
•
Hydraulic pump
•
Unit locked in tilt up:
Mechanical binding
•
Hydraulic pump
•

ELECTRICAL CIRCUIT TESTS

ELECTRICAL CIRCUIT
TESTS

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. 145 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 evalu-
ation 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.
Specifications
IMPORTANT:
hydraulic tests. DO NOT attempt to perform the
following tests while the boat is moving.
TRIM AND TILT
are for static
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