2979 Dunbier V Block Large Poly | Marine Trailer Part

🔧 Product Description

Dunbier Large Poly Bow V-Block – Part Number: 2979

A large moulded poly V-block for supporting and locating the boat's bow or keel against the winch-post or centreline structure. The V-shaped face helps centre the hull while providing a durable non-rubber contact surface.

⚙️ Key Features

• Moulded poly construction
• V-shaped centring profile
• Large Dunbier V-block size
• Resistant to water absorption and marine exposure
• Suitable for replacement or custom trailer setup

📏 Specifications

• Approximate width: 120mm
• Approximate height: 100mm
• Mounting-hole spacing and depth must be confirmed against the bracket

🔄 Cross Reference & Related Parts

• Dunbier: 2979
• Small size: Dunbier 2977
• Large size: Dunbier 2979
• Rubber V-block alternatives are available where softer contact is required

🚤 Trailer Compatibility & Application

• Suitable for compatible bow-stop, keel-guide and centreline brackets
• Select the size that matches the hull angle and bracket width
• Hard poly is commonly preferred for robust aluminium hull contact

🔌 Function

Locates the bow or keel in a repeatable centred position and prevents direct hull-to-metal contact.

⚠️ Common Signs of Failure

• V-block is split or crushed
• Mounting holes are elongated
• Hull no longer sits centrally
• Surface is gouged or contaminated
• Block has become loose on the bracket

🛠️ Installation & Safety

• Support the boat before replacing the block
• Use corrosion-resistant mounting hardware
• Align the V with the trailer centreline
• Avoid point loading on a sharp keel edge
• Recheck the bow-eye and winch-post relationship after adjustment

📦 Condition

• Brand new Dunbier Marine Products trailer component
• Supplied as one large poly V-block
• Supplied in original or equivalent packaging