Anchor replacement

[Holdaway98]

Good morning! We are trying to replace our anchor on our 2023 R27 with a Rocna 10 and have been following the setup on Channel Surfing. The problem we are running into is that Mantus has apparently changed their design on the anchor guard required. They used to offer S, M, or L. Now, only M or L. The new design does not work because the pad does not properly hold the anchor point and is twisting the anchor guard when snug, which puts a lot of pressure on the bow roller. Also, the new design is made for a 1/2” bolt, not the 3/8” bolt that fits the bow roller. (We have tried ordering from second-party retailers that show the correct model in their pictures, but when we receive the product, it’s the new model. Heavy sigh.) Help?
I don’t know how to post pictures here or I would show the difference between the new and old.The old model has an “open v” for the pad. The new model has a small slot instead. I did post the pictures on the TugNuts facebook page-

 

[bobmastors]

I had the same problem with my 2021 R27 and the Rocna 10 anchor.
My solution was to replace the Lewmar Bow Roller with the Mantis BR1 Bow Roller.
The Rocna 10 with the Mantis BR1 works great and does not need the anchor guard.

 

[Almanac]

My slip is just a few down from channel surfing. I also recently got the Rocna 10 for my cutwater C-28. I agree the new design is worse. It doesn't have the larger V-shape. My anchor tip misses the anchor guard unless I guide it into position. I emailed Mantus to complain and they asked me for a picture to help explain. When I get a chance I will send them a picture/video.

I got my guard from Fisheries Supply. I noticed on their description of the guard it said it came with a Stoltz industries polyeurathane V-guard. I was able to find the old orange style V-guard searching stoltz, but I'm not quite sure about the size. They make a 3" RP-3 and a 4" 404 version, I measured the width of the Mantus guard insert and it appeared to be about 3.5" on the internal width (about 4 inches if you could the metal width).

The guard Channel Surfing has is black though, Stoltz makes orange ones and maybe black? I'm not sure if they have changed it a couple times. If I can figure out something to order or get Mantus to send me the better one, I'll let you know.

 

[Bsmith]

I had the same problem with my 2021 R27 and the Rocna 10 anchor.
My solution was to replace the Lewmar Bow Roller with the Mantis BR1 Bow Roller.
The Rocna 10 with the Mantis BR1 works great and does not need the anchor guard.

How difficult was it to replace the Lewmar bow roller with the Mantus BR-1? I bought a Mantus 25 lb. M2 with their Anchor Guard to replace the factory 17 lb. Bruce and now the clearance between the tip of the new anchor and the hull is uncomfortably close so I’m thinking the BR1 with the Anchor Guard might help. Mine is a 2023 R-27 (outboard). TIA.

 

[scross]

I went with the Kingston BR-25D bow roller to go with our Rocna 10kg anchor. Replacing the stock bow roller took about an hour on our C-28. Install only involved drilling one new hole in the bow roller itself to bolt the BR-25D into place using the existing 3 mounting holes in our C-28. Access to the mounting bolts is in our anchor locker so it’s pretty easy.
Lots of clearance between Rocna tip and our hull. About 2.5” to 3.5” depending on how tight the anchor chain is clipped to the cleat for transport on the trailer. After 3 seasons of use it has worked great. Super “beefy” build. Of course you should carefully check all measurements to see if this bow roller will work on your FM model.
Bought a “blem” Kingston BR-25D from Max Marine Outlet for $114 delivered. Just checked, they still have them in stock. Defender also carries them unblemished for $222.

 

[serendipity]

I replaced the factory roller with a Mantus BR-1 and it was relatively easy. You may need longer bolts to attach to the deck. Additionally, I drilled through the side of the Mantus to add another roller, and it was an easy drill.

I can take some pictures the next time we are on the boat, if that would help.

 

[Bsmith]

I replaced the factory roller with a Mantus BR-1 and it was relatively easy. You may need longer bolts to attach to the deck. Additionally, I drilled through the side of the Mantus to add another roller, and it was an easy drill.

I can take some pictures the next time we are on the boat, if that would help.

Photos would be awesome! Thanks!

 

[Beardoggie]

Here's picture of our Rocna 10 anchor with Mantus BR1 bow roller (no guard) on a 2021 R27.

 

[Bsmith]

Thanks! Did you have to do anything to the deck other than drilling holes for the new bow roller? Would it be wildly optimistic to think the bolt pattern would match the Lewmar? You mentioned adding another roller. Was that to better capture the anchor while it is stowed? By chance did the new Mantus come with mounting instructions and templates? All these questions! Thanks so much for your sage advice and counsel. Bruce and Janet Smith. M/V Moxie, Welaka, FL 2023 R27 OB

 

[Beardoggie]

Sorry to confuse this thread. I posted a picture as we have the mantus bow roller BR1 on our boat that was added by the previous owner so I don’t have the answer to all your questions. On a happy note, I’m glad to meet another R27 here in Florida. Please look us up and stop by to see it in person anytime!

 

[Bsmith]

Sorry to confuse this thread. I posted a picture as we have the mantus bow roller BR1 on our boat that was added by the previous owner so I don’t have the answer to all your questions. On a happy note, I’m glad to meet another R27 here in Florida. Please look us up and stop by to see it in person anytime!

If you want to explore the St.Johns River, we are in Welaka and love to meet other Tugnuts.

From the looks of the picture it appears that a spacer (starboard?) might have been added between the deck and roller since the roller is longer than the stock Lewmar roller and there is a step down from just in front of the windlass to the forward edge of the bow that has to be spanned by the base of the roller. Still haven’t figured out how to access the forward mounting bolts. Might be an “ask the factory” question. Perhaps Serendipity will chime in and spill the beans on how it’s done!

 

[serendipity]

We won’t get to the boat for several days, but I found a bow pic that might help if zooming in gives closer detail.

There is no template, but the factory roller can provide a close match. That being said, I will take some closeups when next on the boat.

 

[Bsmith]

We won’t get to the boat for several days, but I found a bow pic that might help if zooming in gives closer detail.

There is no template, but the factory roller can provide a close match. That being said, I will take some closeups when next on the boat.

Thanks!

 

[serendipity]

Thanks!

We finally got to the boat to photo our anchor setup. We replaced the stock Lewmar anchor and roller with a Vulcan 12 and a Mantus BR-1 roller. We also added the Mantus anchor guard and swivel. I have attached pictures below:

 

[Jesperjo]

Thanks! Did you have to do anything to the deck other than drilling holes for the new bow roller? Would it be wildly optimistic to think the bolt pattern would match the Lewmar? You mentioned adding another roller. Was that to better capture the anchor while it is stowed? By chance did the new Mantus come with mounting instructions and templates? All these questions! Thanks so much for your sage advice and counsel. Bruce and Janet Smith. M/V Moxie, Welaka, FL 2023 R27 OB

Noticed you never got an answer to this. No, the stock bolt pattern for the Lewmar roller does not match the Mantus one. The BR1 has a wider bolt pattern. It’s also a wider roller, but on most of the boats, being top mounted, that won’t matter. If you have a boat with a channel to mount the bow roller in though (all the diesel Rangers, Cutwater,…) you would need to make sure the channel fits the new roller though. I believe but cannot confirm that the BR1 fits all of them. The Anchor Mate may also interfere with the channel. I had to modify the way it was attached to the roller to fit it on our boat.

Not sure why the poster added another roller, but that hasn’t been necessary in my experience. However, the Mantus roller is a bit longer than the Lewmar, so it sticks out a bit more.

The bow roller itself is really the template, but it comes with easy to follow instructions. It’s really not hard. You may need a heat gun to remove the old bow roller since it’s attached not just with bolts, but with Sikaflex 291. You will want to scrape as much of that off as you can to get a solid mount for the new roller. Then lay down a new bead of Sikaflex before you permanently attach the new roller. Do the work close to the marine hardware store because you’ll need to go a few times to get the right bolts. Ask me how I know. BTW, I recall that the instructions for the Mantus Bow Roller says to use round-head carriage bolts. That implies it has square holes for holding those bolts, but alas, no. The holes are round, so I’m really unclear how round-head carriage bolts would ever work properly.

 

[serendipity]

We added the BR-1 because the tip of the anchor was at risk of contacting the SS bow plate even with the anchor guard in place.

BTW, the BR-1 fit within the base of the Lewmar roller and matched the rear bolt holes, two holes were needed to be drilled in sides of the BR-1to bolt the forward end to base of the stock Lewmar roller.

While BR-1 roller does not have pivoting feature, the anchor deploys and retrieves smoothly.

 

[Bsmith]

We added the BR-1 because the tip of the anchor was at risk of contacting the SS bow plate even with the anchor guard in place.

BTW, the BR-1 fit within the base of the Lewmar roller and matched the rear bolt holes, two holes were needed to be drilled in sides of the BR-1to bolt the forward end to base of the stock Lewmar roller.

While BR-1 roller does not have pivoting feature, the anchor deploys and retrieves smoothly.

I like that the original base of the Lewmar roller didn’t have to be removed in order to use the Mantus roller. If I understand correctly the forward end of the Mantus roller is held by two bolts that insert from the sides into holes that were drilled into the new roller while using the same holes that were the pivot point on the Lewmar. The factory Lewmar roller had a third bolt towards the forward end attaching it to the deck. Did the BR-1 simply go over that bolt with attachment to the sides or did that third bolt get used as part of the mount? Was that third bolt removed and the hole filled? Were the two forward mounting holes on the BR-1 used at all? Many thanks for all the great information and advice! The new Mantus roller just arrived and is a thing of beauty.

 

[serendipity]

I will attempt to answer your questions, but feel free to direct message me or reach out to serendipity.r27ob@gmail.com. I’d be more than happy to chat at greater length.

1. The factory 3rd bolt at the bow was not used. It was left to hold the Lewmar base in place. It was also glassed over under the deck and removal would have been a pain.

2, I removed the two aft bolts on the factory base and replaced them with 2 longer bolts that went through the rear bolt holes on the BR-1. I was able to use the factory holes as they lined up with those on the BR-1.

3. The 2 forward holes on the BR-1 were not used. However, I drilled two holes in the side of the BR-1 to line up with what I’ll call the pivot holes on the factory base. I then bolted the BR-1 to the factory base through those holes. BTW, drilling the two holes in the BR-1 was easier than anticipated.

As I said earlier, I would be happy to chat offline if that would be helpful.