Camoo Transom Support Plate Kit TSP-1 & TSP-2DP — Cast Aluminium 15"/12" Plates for Top and Lower Outboard Bolt Holes

Camoo TSP-1 & TSP-2DP are paired cast-aluminum transom support plates designed to reinforce the top and lower outboard mounting bolt holes, spreading load and protecting your boat's transom.

These two precision-machined plates — a 15" x 2" TSP-1 for top bolt holes and a 12" x 2" TSP-2DP for lower bolt holes — attach behind standard outboard mounting points used by major manufacturers such as Mercury, Evinrude, Johnson, and Yamaha. Built from durable cast aluminum and CNC-finished, they distribute the stress from modern heavier 4-stroke outboards across a wider surface, reducing point-loads on the hull and extending the useful life of the transom when installed correctly.

How do these plates reduce transom damage?

By increasing the bearing area behind each bolt pattern, the TSP-1 and TSP-2DP lower the pressure exerted at the bolt holes. That reduces localized compression and flexing in the wood or composite transom core, helping to prevent cracks, crushed fiber, and water intrusion around fasteners.

• Broad 15" and 12" lengths spread forces across multiple hull ribs.
• 3/8" thickness resists bending under engine torque and vibration.
• Fits universal bolt patterns for major outboard brands for correct alignment.
• CNC machining ensures flatness and proper hole spacing for snug installation.

What sizes and fitments are included in the kit?

The kit contains two support plates sized for the standard top and lower bolt holes of most outboards: TSP-1 measures 15" x 2" and TSP-2DP measures 12" x 2" with a 10" hole spacing for the lower plate. These dimensions match common universal mounting patterns so installation is straightforward on compatible motors.

• TSP-1: 15" long, 2" wide, 3/8" thick for top bolt holes.
• TSP-2DP: 12" long, 2" wide, 3/8" thick with 10" hole spacing for lower bolts.
• Package includes one TSP-1 and one TSP-2DP plate ready to install.
• Designed to match Mercury, Evinrude, Johnson, Yamaha universal patterns.

What material and finish protect the plates from marine conditions?

Camoo manufactures both plates from high-quality cast aluminum chosen for its corrosion resistance and strength-to-weight ratio. CNC machining provides precise hole placement and a flat mating surface that reduces stress concentrations and eases installation.

• Cast aluminum resists rust and keeps weight low.
• CNC-finished surfaces ensure consistent fit and even load transfer.
• Thickness and cross-section balanced for stiffness without excess mass.
• Durable finish tolerates exposure typical of outboard mount areas.

How do I install these support plates correctly?

Installation is a simple retrofit behind the transom where the outboard bolt holes align. Use correct through-bolts, lock washers, and marine-grade sealant; torque bolts to the engine manufacturer's specifications to avoid over-compression of the transom or plates.

• Place plate behind transom aligning manufacturer bolt pattern.
• Apply marine sealant and use proper-length through-bolts and washers.
• Tighten to engine maker torque specs — avoid overtightening.
• Inspect periodically for hardware tightness and seal integrity.

Who this is for: boat owners upgrading or maintaining outboard mounts on small-to-medium craft who want an economical, durable way to reduce transom wear from heavy modern 4-stroke engines. It’s suited to DIYers and professional marine technicians alike who need reliable, CNC-accurate reinforcement plates compatible with major outboard brands.