Power Trim for Mercury and Mariner outboard engines
The Power Trim system changes the angle of the outboard motor to the boat's transom. The engine is moved hydraulically via a trim switch, allowing the position of the drive to be adjusted while the boat is underway.
When trimming in, the motor is moved closer to the boat's transom. When trimming out, the motor is tilted further away from the boat. This setting influences acceleration, gliding behavior and driving stability.
The trim range usually covers the first 20 degrees or so of motor movement and is used while the boat is moving. In addition, the engine can be raised further to tip it out of the water in shallow water, for example.
Components of the power trim system
A typical power trim system consists of several components:
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Trim pump
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electric motor
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Hydraulic cylinder
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Trim relay
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Switch and wiring
These components work together to move the outboard motor electrically and hydraulically.
Difference between trimming and tilting
During operation, the engine is set in the trim range to optimize performance.
Tilting lifts the engine further out of the water. This is used, for example
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when trailering
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in shallow water
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for maintenance work on the engine
Suitable power trim parts for Mercury / Mariner
The correct power trim spare part is selected via:
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Engine series
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Engine power (hp)
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Year of manufacture
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Mercury part number
Many Mercury and Mariner engines use identical trim components, provided the part number matches.
