T-H Marine Outboard Motor Transom Pads/Support Plates
When it comes to protecting your boat's transom from the mounting stress of high-performance outboard motors, T-H Marine offers engineered solutions that have earned the trust of both recreational boaters and professional anglers. Since 1975, this family-owned manufacturer has been producing thousands of marine accessories, with their outboard motor transom pads and support plates representing some of the most essential hardware for proper engine installation and long-term transom integrity.
Engineered Aluminum Construction for Maximum Protection
T-H Marine's transom support plates are constructed from strong 3/8" 6061 T6 alloy aluminum rather than cast aluminum, which allows them to eliminate bolts "biting" into transoms and more evenly distribute loads on high-performance engines. This superior material choice translates directly to better transom protection, especially critical for boats running larger horsepower outboards where mounting bolt stress concentrates in relatively small areas. The plates mount in the splashwell using the motor's existing mounting bolts, creating a reinforced interface that spreads engine weight and operational forces across a wider surface area.
Product Range and Application
T-H Marine manufactures transom support plates in multiple configurations to accommodate different outboard mounting patterns. Their plates are available with bolt hole patterns of 10" and 13" to fit standard top bolt holes, with consistent 3/8" thickness for structural integrity. Beyond their standard cast aluminum plates, T-H Marine also offers their CMC Machined Transom Support Plates through their CMC Marine subsidiary—a company T-H Marine acquired specifically for its machining expertise in precision metal products. These machined versions deliver even tighter tolerances for demanding applications.
Why Transom Support Plates Matter
Modern outboard motors generate tremendous power and operate at high RPMs, creating substantial vibration and stress at mounting points. Without proper support, transom wood or fiberglass can compress over time, allowing mounting bolts to work loose or even crack the transom structure itself. T-H Marine's support plates solve this problem by serving as a load-distributing washer that prevents point loading and material compression. This is particularly valuable for boats running in rough water conditions, where pounding forces amplify mounting stresses, and for high-performance bass boats and offshore vessels where engine reliability cannot be compromised.
T-H Marine's Manufacturing Heritage
T-H Marine is a family-owned business that has been serving the marine industry since 1975. Their boat products are found on virtually every recreational boat built in the United States, including bass boats, pontoon boats, runabouts, ski boats, deck boats, offshore fishing boats, flats boats, aluminum fishing boats, and center console boats. This extensive OEM presence reflects the quality and reliability that professional boat builders demand, and the same engineering standards apply to their aftermarket transom support plates available for boat owners performing motor installations, upgrades, or transom repairs.
