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Transom Plates

Outboard Transom Backing Plate – 8mm White Polypropylene - 100133

Brand: OceanSouth

SKU: OS-100133

$25.00
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The Oceansouth 100133 Outboard Transom Backing Plate provides durable protection for boat transoms during outboard motor installation. Manufactured from solid, UV-resistant marine-grade polypropylene, this 8mm thick white mounting plate helps distribute clamping pressure and protect the transom surface from damage. Featuring smooth rounded edges and a tapered design, it provides a neat, professional finish for compatible aluminium and fibreglass boats.

Key benefits

Key Benefits

  • - Solid 8mm thick marine-grade polypropylene construction.
  • - UV-resistant material for marine environments.
  • - Helps distribute outboard motor mounting pressure.
  • - Protects the transom surface from scratches and compression damage.
  • - Smooth rounded edges with a tapered design.
  • - Durable white finish.
  • - Suitable for compatible aluminium and fibreglass boats.
  • - Can be trimmed or drilled where appropriate for installation.
  • - Suitable for new outboard installations and replacement of worn backing plates.

Specifications & Dimensions

  • - Brand: Oceansouth
  • - Part Number: 100133
  • - Product Type: Outboard Motor Transom Backing Plate
  • - Colour: White
  • - Material: Solid Marine-Grade Polypropylene
  • - UV Resistance: Yes
  • - Thickness: 8mm (0.31")
  • - Overall Height: 330mm (12.99")
  • - Top Width: 390mm (15.35")
  • - Bottom Width: 350mm (13.78")
  • - Shape: Tapered with rounded outer edges
  • - Mounting Position: Between outboard motor mounting assembly and boat transom
  • - Installation: Drilling or trimming may be required

Compatible Boats & Applications

  • Aluminium Boats
  • - Selected Quintrex aluminium boats.
  • - Selected Stacer aluminium boats.
  • - Selected Savage aluminium boats.
  • - Aluminium fishing boats and tinnies.
  • - Open runabouts with suitable transom dimensions.
  • Fibreglass Boats
  • - Recreational fibreglass boats.
  • - Small cabin cruisers.
  • - Fibreglass fishing boats.
  • - Runabouts with compatible outboard mounting arrangements.
  • Outboard Motor Applications
  • - Clamp-mounted outboard motors where the plate provides adequate clearance.
  • - Bolt-mounted outboard motors with suitable mounting arrangements.
  • - Replacement transom protection plates.
  • - New outboard motor installations.
  • - Transom surface protection during motor mounting.

Important Fitment Information

  • - Confirm the transom has sufficient mounting area for the 390mm top width and 330mm height.
  • - Ensure the 8mm plate thickness is suitable for the outboard mounting arrangement.
  • - Check the engine manufacturer's transom thickness and mounting requirements.
  • - Confirm clearance around outboard clamps, mounting bolts and steering components.
  • - Position the plate correctly to distribute mounting pressure.
  • - Drill mounting holes only where required, using the correct dimensions.
  • - Ensure mounting hardware is correctly tightened.
  • - Inspect the transom for existing cracks, rot or structural damage before installation.
  • - This backing plate provides surface protection and load distribution; it is not a substitute for structural transom reinforcement.

Shipping

Ships Australia-wide