3151 Dunbier Hard Poly 6" Roller and "Big Mouth" Bracket | Marine Trailer Part

🔧 Product Description

Genuine Dunbier Marine Products Hard-Poly Roller and Big-Mouth Bracket 6" – Part Number: 3151

A galvanised wide-opening big mouth bracket fitted with 1 6-inch hard polyurethane roller. The assembly supports and guides the boat hull during launch and retrieval. The wider bracket opening provides additional clearance for compatible keel or hull shapes.

⚙️ Key Features

• Hard polyurethane roller construction
• 1-roller wide-opening big mouth bracket
• Galvanised marine-trailer bracket
• Roller rotates to reduce hull drag during loading
• Suitable for replacement or trailer-support adjustment

📏 Specifications

• Nominal roller size: 6-inch
• Roller quantity: 1
• Roller material/colour: Hard polyurethane
• Leg length: Follow supplied bracket configuration
• Supply: complete roller and bracket assembly

🔄 Cross Reference & Related Parts

• Standard hard-poly assembly: Dunbier 3152

🚤 Compatibility & Application

• Compatible Dunbier trailer roller stations matching the bracket width, leg spacing and roller shaft size
• Position rollers under structurally supported hull areas
• Set neighbouring rollers to share the hull load rather than creating isolated pressure points
• Confirm the assembly clears strakes, chines, transducers and hull fittings
• Use the correct roller shaft, washers and retaining clips

🔌 Function

Supports the hull and allows it to roll across the trailer with reduced friction while helping maintain centreline alignment.

⚠️ Common Signs of Failure

• Roller is cracked, worn flat, swollen or seized
• Bracket or legs are bent
• Roller shaft or holes develop excessive play
• Retaining hardware is missing
• Hull contacts the metal bracket

📦 Condition

• Genuine Dunbier Marine Products part
• Brand new
• Supplied in original or equivalent packaging