Yes, you can fix this. The trim sender mist have the ground Removed from the engine and run directly to the terminal block in the transom. It was originally isolated from the engine, and odds are the individual who rigged the boat did not know it is necessary. You can read the PDF on the home page drop down to learn more on programming if you do not have your manual. The trim sender on a Merc is notorious for failure also. You can check for a signal in the multi function window. Plus the Merc is the default setting when you disconnect the power. BCB
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