Adjustable trim position system

An adjustable trim position system for a trimable marine stem drive comprising:

• a drive housing pivotally mounted to a transom of a boat for rotation about a generally horizontal axis to trim the stem drive, the drive housing having a substantially horizontal elongated anchor pin hole therethrough;
• a cylinder anchor pin extending through the elongated anchor pin hole in the drive housing so that a starboard end of the cylinder anchor pin is present on the starboard side of the drive housing and a port end of the cylinder anchor pin is present on the port side of the drive housing;
• a trim adjustment insert that can be inserted into the elongated anchor pin hole either fore or aft of the cylinder anchor pin to adjust the position of the cylinder anchor pin relative to the drive housing;
• a starboard hydraulic cylinder having a fore end and an aft end, the fore end of the starboard hydraulic cylinder being pivotally mounted to a starboard side fixed location that is lower than the generally horizontal trim axis for the drive, the aft end of the starboard side hydraulic cylinder being mounted to the starboard end of the cylinder anchor pin;
• and
• a port side hydraulic cylinder having a fore end and an aft end, the fore end of the port side hydraulic cylinder being pivotally mounted to a port side fixed location that is lower than the generally horizontal trim axis for the drive, the aft end of the port side hydraulic cylinder being mounted to the port end of the cylinder anchor pin.

An adjustable trim position system for a trimable marine drive comprising:

• a drive housing pivotally mounted to a transom of a boat for rotation about a generally horizontal axis to trim the marine drive, the drive housing having an enlarged anchor pin hole;
• a cylinder anchor pin located at least in part within the enlarged anchor pin hole in the drive housing, the cross-section of the anchor pin being smaller than the cross-section of the enlarged anchor pin hole;
• a trim adjustment insert that can be inserted into the enlarged anchor pin hole in the drive housing, the trim adjustment insert having a surface that contacts and complements at least a part of the anchor pin to maintain the anchor pin in a fixed position within the enlarged anchor pin hole in the drive housing;
• and
• a hydraulic cylinder having a fore end and an aft end, the fore end of the hydraulic cylinder being pivotally mounted to a fixed location that is lower than the generally horizontal trim axis for the drive, and the aft end of the hydraulic cylinder being mounted to the cylinder anchor pin.

An adjustable trim position system for a trimable marine drive comprising:

• a transom assembly that is fixed to the transom of a boat, the transom assembly having an enlarged anchor pin hole;
• a drive housing pivotally mounted to the transom assembly for rotation about a generally horizontal axis to trim the marine drive;
• a cylinder anchor pin located at least in part within the enlarged anchor pin hole in the transom assembly, the cross-section of the anchor pin being smaller than the cross-section of the enlarged anchor pin hole;
• a trim adjustment insert that can be inserted into the enlarged anchor pin hole in the transom assembly, the trim adjustment insert having a surface that contacts and complements at least a part of the anchor pin to maintain the anchor pin in a fixed position within the enlarged anchor pin hole in the transom assembly;
• and
• a hydraulic cylinder having a fore end and an aft end, the fore end of the hydraulic cylinder being pivotally mounted to the cylinder anchor pin, and the aft end of the hydraulic cylinder being mounted to the drive housing.