R & D Engine Mount w/4" Footprint - 5/8" Stud - 50-175lbs Capacity Per Mount

The R & D Engine Mount w/4" Footprint - 5/8" Stud is purpose-built for boaters and anglers who demand rock-solid drivetrain stability without sacrificing comfort on the water. After years spent running offshore and navigating rough chop, you know that engine vibration can fatigue both hull and operator—and loose mounts create dangerous propeller thrust issues. These mounts solve that problem by combining stiffness where it counts with controlled isolation that keeps your cabin and helm station quiet and comfortable.

Engineered specifically for marine duty, the R & D Engine Mount features a 4-inch footprint that fits standard engine rails and accepts a 5/8-inch stud for secure fastening. The mount's dual-function elastomer design absorbs forward and reverse propeller thrust while isolating high-frequency drivetrain vibration from the hull structure—critical for maintaining hull integrity over thousands of operating hours. With a load capacity of 50–175 pounds per mount, it accommodates everything from small outboard brackets to mid-range inboard installations. The 2.4-pound compact profile (6 x 4 x 6 inches) allows for straightforward installation without major structural modification.

Commercial operators, charter captains, and serious recreational boaters benefit most from upgrading to quality mounts like these—especially if you're running twins or a larger single-engine setup where vibration transfer directly impacts long-term hull health and crew comfort. Whether you're installing a replacement set or retrofitting an older vessel, confirm your engine weight distribution and stud spacing before ordering; most inboard and outboard applications use the standard 5/8-inch stud configuration, but verify compatibility with your specific motor brackets.