Adjustable trim position system

Details Adjustable trim position system Adjustable trim position system

1996-05-31

1998-01-13

Avila, Stephen

Marine propulsion

Screw propeller

With means effecting or facilitating movement of propulsion...

B63H 512

Patent

active

057072639

ABSTRACT:
A system for a trimable marine stem drive shifts the trimable range on a conventional hydraulic trim system. The system includes an enlarged cylinder anchor pin hole in the drive shaft housing, an anchor pin smaller in size than the enlarged anchor pin hole located in the drive shaft housing, and a movable trim adjustment insert that is inserted into the enlarged anchor pin hole to secure the anchor pin in a fixed position within the enlarged hole. It is preferred that the enlarged anchor pin hole be a substantially horizontal elongated hole, and that the trim adjustment insert be placed rearward of the anchor pin to position the anchor pin in a forward position, or forward of the anchor pin to locate the anchor pin in a rearward position. The invention shifts the trimable range of the drive, while maintaining vibration isolation characteristics available in conventional hydraulic trim systems.

REFERENCES:
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Power Trim, MerCruiser Service Manual No. 5, Stern Drive Units TR-TRS 90-12935 1085, pp. 5A-1-5E-4, Brunswick Corporation, 1985.
Instruction Manual showing trim blocks, admitted prior art.

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