VEVOR Hydraulic Steering Kit, 150 HP, Marine Boat Hydraulic Steering System, with 6.9 MPa/1000 psi Helm Pump, Two-Way Lock Cylinder, and 7.32m High-Strength Hoses, for Single Station Single-Engine Use

Yes, this product fits a Mercury 115HP 4-stroke saltwater series outboard If this answer does not resolve your current issue, please contact us again for assistance.

Not directly compatible Possible with adapters and modification, but not guaranteed Best option: a kit specifically rated for older Johnson/Evinrude V4 engines