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Best Transom Plate For Fiberglass Boat: Top 6 Choices

If you own a fiberglass boat with an outboard motor, installing a transom plate can provide extra support and help distribute the engine’s weight and stress more evenly.

A quality transom support plate is a simple upgrade that can prolong the life of your boat’s transom.

Here are our top picks for the best transom plates available on the market today.

What is the Best Transom Plate for Fiberglass Boat?

Here are my recommended best transom plates for fiberglass boats.

1. Bonbo TSP-1 Transom Support Plate

The Bonbo TSP-1 is designed to fit the top bolt holes on your outboard motor (3001-8067). At 15″ x 2″, this sturdy aluminum plate helps spread out the force from your motor’s bolts. It’s easy to install and comes with stainless steel hardware.


  • Simple, effective design
  • Fits common bolt hole pattern
  • Includes mounting hardware


  • May not fit all motors
  • Some users prefer thicker 1/4″ plates for heavy motors

2. Camoo TSP-1 & TSP-2DP Transom Support Plate Kit

The Camoo TSP-1 & TSP-2DP kit includes two transom support plates – one for the top bolt holes (TSP-1) and another for the lower bolt holes (TSP-2DP). The TSP-1 measures 15″ x 2″, while the TSP-2DP is 12″ x 2″ with a 10″ bolt hole pattern. Both plates are made from 3/8″ thick cast aluminum for superior strength and durability.


  • Includes plates for both top and lower bolt holes
  • Thick 3/8″ cast aluminum construction
  • Fits standard bolt patterns


  • May be overkill for smaller outboards
  • Pricier than buying a single plate

3. Yoursme TSP-1 TSP-2DP Transom Support Plate Kit

Similar to the Camoo kit, the Yoursme TSP-1 TSP-2DP kit comes with two transom support plates for the top and lower bolt holes. The TSP-1 plate fits the standard top bolt hole pattern, while the TSP-2DP is designed for the lower bolts. Both plates are crafted from durable aluminum to reinforce your boat’s transom.


  • Two plates for complete transom support
  • Sturdy aluminum construction
  • Fits standard top and lower bolt patterns


I haven’t seen any so far.

4. TSP-1 Transom Plate Aluminum Transom Support Plate

The TSP-1 Transom Plate is designed to fit the top bolt holes (3001.8067) on your outboard motor. Measuring 15″ x 2″ with a 13″ bolt hole pattern, this aluminum plate helps distribute the force from your motor’s bolts across a larger area. It comes with stainless steel mounting hardware for easy installation.


  • Fits common top bolt hole pattern
  • Sturdy aluminum construction
  • Includes stainless steel fasteners


  • May not be compatible with all outboard models
  • Some users may prefer a thicker plate

5. T-H Marine Transom Support Plate – Lower

T-H Marine’s lower transom support plate is designed to reinforce the bottom bolt holes on your outboard motor. Made from durable aluminum, this plate helps prevent damage to your boat’s transom caused by engine vibrations and stress.


  • Specifically designed for lower bolt holes
  • Durable aluminum construction
  • Easy to install


  • May not fit all outboard models
  • Some users may also need a top support plate

6. Attwood 94110-5 UV-Resistant Marine-Grade Boat Transducer Mounting Plate

While not a transom support plate, the Attwood 94110-5 mounting plate is a useful accessory for installing transducers on your boat. This UV-resistant, marine-grade plate measures 12″ x 4-3/4″ and includes stainless steel hardware for a secure, corrosion-resistant installation.


  • UV-resistant and marine-grade construction
  • Ideal for mounting transducers
  • Includes stainless steel hardware


  • Not designed for outboard motor support
  • May be larger than needed for some transducers

==>> Also read The best transducer mounting plate for fiberglass boats here!

When selecting the best transom plate for your fiberglass boat, consider factors like the size and horsepower of your outboard motor, corrosion resistance, ease of installation, and compatibility.

While all the plates we’ve covered are good options, the Bonbo TSP-1 and Fulton models stand out for their straightforward design, easy installation, and solid construction at reasonable prices.

Final Word

Whichever transom support plate you choose, you’ll be taking a smart step to protect your fiberglass transom from stress cracks and damage.

With the right plate properly installed, you can enjoy more confidence in your outboard motor setup and more trouble-free days on the water.

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