Outboard will not trim up or
down.
Outboard trims up, will not trim
down.
Outboard trims down, will not
trim up.
Outboard will not return com-
pletely to “down” position or re-
turns part way with jerky mo-
tion.
Outboard thumps when
shifted.
Outboard trails out when back-
ing off throttle at high speed.
Outboard will not hold a
trimmed position or will not re-
main tilted for any extended
period.
Outboard will not hold trim po-
sition when in reverse.
Determine if Power Trim
pump motor operates when
appropriate trim circuit is
activated.
Pump motor operates.
Refer to “Hydraulic System
Troubleshooting.”
Refer to “Electrical System
Troubleshooting.”
Pump motor does not operate
Problem Chart
5D-4 - MID-SECTION 90-817643R1 DECEMBER 1996
Troubleshooting
Determining if Problem is Electrical
or Hydraulic
When a problem is encountered with the Power Trim
system, the first step is to determine whether the mal-
function is in the “electrical system” or the “hydraulic
system.” Refer to the following chart to determine
which system is at fault.
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