Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop – Fits 7" x 4" Trailers (Replaces MARKGOO 7X4 INCH)

Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop – Fits 7" x 4" Trailers

This polyurethane bow stop roller provides smooth support for your boat during loading and launching operations on most trailers with a 1/2" mounting shaft. It mounts easily to the winch post or winch stand at the front of the trailer.

Direct replacement for MARKGOO 7X4 INCH trailers and similar models requiring a 7" length and 4" width bow stop roller assembly.

• Includes 1 × Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop
• Blue polyurethane housing offers wear and water resistance
• Mounts to winch post or winch stand on the trailer

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 × Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop (Blue, 7" × 4")

Installation Guide

1. Locate the winch post or winch stand on the front of your trailer.
2. Remove the existing bow stop roller assembly if applicable.
3. Align the 1/2" shaft hole of the new roller assembly with the mounting shaft on the trailer.
4. Slide the roller assembly onto the shaft fully.
5. Secure the assembly with appropriate fasteners and ensure it spins freely.
6. Check alignment so the bow of the boat contacts the roller smoothly during loading.
7. Test the installation by manually rolling the boat onto the trailer.
8. Make any necessary adjustments for proper fit and function.
9. Tighten all hardware firmly before regular use.

Troubleshooting & FAQ

• How do I confirm this fits my trailer? Check that your trailer has a 1/2" mounting shaft on the winch post or stand and that dimensions close to 7" x 4" are appropriate.
• How often should I replace the bow stop roller? Replace if you notice wear that reduces smooth rolling, cracking, or damage that may mark your boat.
• What makes this different from OEM parts? This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
• How fast do you ship and how much does it cost? We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
• What is your warranty and return policy? This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
• How do I maintain this roller assembly? Rinse with fresh water after exposure to saltwater and inspect periodically for wear or damage.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.