Seastar - Manual Jack Plate With Side Locks For Engines Up to 300 HP, Max Engine Weight 585 lbs. - JP1080SS Boat Trailer Roller Shafts & Pal Nuts How do the fully encapsulated

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Seastar - Manual Jack Plate With Side Locks For Engines Up to 300 HP, Max Engine Weight 585 lbs. - JP1080SS Boat Trailer Roller Shafts & Pal Nuts How do the fully encapsulatedInterlocking slide guides offer enhanced strength and smooth, bind free travel Pre greased stainless steel lead screw for smooth operation Handles either 2 or 4 stroke engines to 300 HP or 585 lbs. Standard B. I. A. mounting pattern for simplified installation Aircraft grade 6061 T6 aluminum alloy provides light weight, high tensile strength and corrosion resistance Precision machining from work hardened, extruded billet for strength Military standard