Patent ID: 6739923
Filing Date: 2004-05-25
Classification: B63B,B63H

Abstract:
An engine alignment jig assembly used for installing an engine in a hull of a small watercraft via four engine mounts in such a manner that an output shaft of the engine is in alignment with a rotating shaft of a propulsion unit of the watercraft, the engine alignment jig assembly comprising:an engine positioning jig for positioning the engine mounts relative to the rotating shaft of the propulsion unit, the engine positioning jig including an engine lower part dummy constructed to resemble a lower half of the engine, the engine lower part dummy including a generally rectangular skeleton frame having substantially the same size in plan view as the lower half of the engine, four screws each provided at a respective corner of the rectangular skeleton frame and adapted to be threaded in a corresponding one of the engine mounts to attach the engine lower part dummy to the engine mounts, wherein two adjacent ones of the screws that are disposed on a bow side of the watercraft form left and right front screws, and the remaining two screws that are disposed on a stern side of the watercraft opposite the bow side form left and right rear screws, a front through-hole formed in the skeleton frame with a center thereof disposed between the left and right front screws and aligned with an axis of the rotating shaft of the propulsion unit, and a rear through-hole formed in the skeleton frame with a center thereof disposed between the left and right rear screws and aligned with the axis of the rotating shaft of the propulsion unit.