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Description
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 – 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.
| Brand | Part Number |
|---|---|
| MARKGOO | 7X4 INCH |
Compatible Engine Models
Confirm your engine model/year in the table below.
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Bow Stop Roller Assembly |
| Installation | Mounts to winch post or winch stand |
| Housing Material | Polyurethane |
| Housing Color | Blue |
| Dimensions | 7" overall length × 4" width (178 × 102 mm) |
| Shaft Hole Diameter | 1/2" (12.7 mm) |
| Other Technical Attributes | Will not mark boat, wear-resistant, water-resistant |
Package Contents
- 1 × Boat Trailer Roller Assembly with 1/2" Shaft Bow Stop (Blue, 7" × 4")
Installation Guide
- Locate the winch post or winch stand on the front of your trailer.
- Remove the existing bow stop roller assembly if applicable.
- Align the 1/2" shaft hole of the new roller assembly with the mounting shaft on the trailer.
- Slide the roller assembly onto the shaft fully.
- Secure the assembly with appropriate fasteners and ensure it spins freely.
- Check alignment so the bow of the boat contacts the roller smoothly during loading.
- Test the installation by manually rolling the boat onto the trailer.
- Make any necessary adjustments for proper fit and function.
- 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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 6 reviews
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Product Reviews
★★★★★ 5
Keeps Aussie Entertained for Hours
Size: 4 Pieces, Size: 4 Pieces
This puzzle toy has quickly become one of my dog’s favorite sources of entertainment. It keeps him busy, challenged, and happy. The variety of difficulty levels gives him a challenge, and it is so fun to watch him work through the puzzles. Even when he is just playing with individual pieces, he is entertained.
It is also very user-friendly. Setup is simple, and it is not overly complicated for the owner to manage. Cleaning is surprisingly easy, too. The pieces wipe down well, and nothing traps food or slobber, which is a huge win compared to some other toys we have tried.
Functionality-wise, it is fantastic. The levels of difficulty actually work as intended, and I like being able to adjust them based on my dog’s mood. It is durable, too. The weight and sturdiness of the pieces keep them from sliding around too much during play, and they are tough enough to withstand my Aussie’s powerful chewing without damage. I also like how it is numbered so you can quickly move onto the next level without too much thought. With that, I have noticed the higher levels are challenging, and my Aussie has yet to get through them all. Eventually he gets bored and stops trying.
It is a high-quality, fun, and engaging toy that provides mental stimulation, holds up to rough play, and is easy for me to maintain. Definitely one of the best puzzle toys I have tried!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on August 19, 2025
★★★★★ 5
She loves it!
Size: 4 Pieces, Size: 4 Pieces
Tried it as soon as we received it. My dog is a doberman german shepherd mix. I used multiple levels to see what my dog can figure out. It kept her pretty occupied for about 15 minutes and then I readjusted the last level so she could figure it out. With that being said, it can definitely keep them busy for longer! This is going to be a great toy, we love it already. Very durable for my girl, she's a pretty heavy chewer. Very easy to clean because it's a rubber material. The overall puzzle design is also great, really gets them to think. Very easy to stuff treats or kibble inside. Lastly, I LOVE that it's blue and yellow! I wish more toys were in blue and yellow because dogs are color blind! I would definitely consider getting more pieces in the future.
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Reviewed in the United States on March 15, 2026
★★★★★ 4
Good product
Size: 6 Pieces
Fun for dogs with anxiety or bored. Easy to fill and clean with different options to build.
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Reviewed in the United States on May 21, 2026
★★★★★ 5
Durable and fun
Size: 4 Pieces, Size: 4 Pieces
I have a chewer who gets bored in the afternoon. She loves these Lego blocks. They’re sturdy enough for a big chewer and they hold her interest . She really enjoys figuring out how to get her breakfast!
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Reviewed in the United States on June 4, 2026
★★★★★ 3
Love the idea!
Size: 6 Pieces, Size: 6 Pieces
Love the idea of this product! Arrived 3/25/2026 and started using it the same day. Lab puppies (8 months old) loved it too, until one of the tabs was chewed off 😞
One of the puppies ate something (not this product) last week and was sick & finally threw up the rubber pieces he ate. So they can’t use the toys they love!
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Reviewed in the United States on April 1, 2026