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Old 24-08-2016, 04:10   #1
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55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

I am having difficulty choosing the size of the anchor I need.

My plans are to sail up/down the ICW to spend the winters in the Caribbean.

I would probably sleep better at night knowing I own a 65lb model but is it overkill for daily use?

Here is the sizing chart from Mantus:

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Old 24-08-2016, 04:21   #2
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

What other anchors you have?
If nothing bigger and better I would get the 85 lb one.
And I'm not kidding.
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Old 24-08-2016, 04:34   #3
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

I have Stainless 105lb Mantus on Hylas 54. I can tell you it seemed soooo big when we got it, but as soon as we were in a blow we were so happy to have that monster dug in. I would go for the bigger one for peace of mind but check that it will fit under a furler drum or similar. You can download a paper cut out of the anchor, mount it on cardboard and see how it fits and estimate the shank trajectory as it comes over the bow roller. We have to bring the anchor up in small jogs when it reaches the bow roller to prevent it smacking the drum. Not really a problem.
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Old 24-08-2016, 06:40   #4
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

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What other anchors you have?
If nothing bigger and better I would get the 85 lb one.
And I'm not kidding.
I just purchased the boat and it has a smaller Delta that I am planning to get rid of.

I will be purchasing a Fortress FX-23 as my secondary anchor.
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Old 24-08-2016, 06:41   #5
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

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Originally Posted by Hobiehobie View Post
I have Stainless 105lb Mantus on Hylas 54. I can tell you it seemed soooo big when we got it, but as soon as we were in a blow we were so happy to have that monster dug in. I would go for the bigger one for peace of mind but check that it will fit under a furler drum or similar. You can download a paper cut out of the anchor, mount it on cardboard and see how it fits and estimate the shank trajectory as it comes over the bow roller. We have to bring the anchor up in small jogs when it reaches the bow roller to prevent it smacking the drum. Not really a problem.
That's insane.

So are you both suggesting I got with the 85b anchor for my 41ft boat?
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Old 24-08-2016, 06:47   #6
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

The 65lb is already +2 sizes. If that doesn't hold you....

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Old 24-08-2016, 06:55   #7
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

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The 65lb is already +2 sizes. If that doesn't hold you....
That's what I was thinking... 65b is already extra safe.

85lb just seems insane. Especially for daily use.

Wouldn't all that weight be really hard on my windlass after a while?
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Old 24-08-2016, 07:07   #8
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

It is, especially in deep water and even harder on you if your windlass fails or the anchor gets snagged and you have to dive down to free / retrieve it. Web use a 55lb Delta on a 38 cat with a lot of windage

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Old 24-08-2016, 07:23   #9
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

My take is to get the largest new-generation anchor (Mantus being one) which you and your anchoring system can reasonably manage under most conditions. Your anchor should match your rode, your windlass, your roller and storage, and most importantly your crew.

Anchoring is not just about the anchor. Far more important is proper anchor technique. No hunk of metal is going to hold a boat without being properly set on adequate rode in the right conditions.

So yes, it is possible to go to big for a bower (in my opinion). Too big will place undue stresses on you and your boat's systems. If it is overly big it will (in all likelihood) reduce a crew's desire to anchor properly when multiple attempts are required. A way oversized anchor may be hard to set properly, and will become extremely difficult to retrieve by hand should the windlass cut out.

There are those who say bigger is always better. I disagree ... at least not for your bower. Yes, for a storm anchor. Absolutely you want the biggest thing you can get. But for regular use a bower should be something that will hold you in normal conditions x 3, so for the Great Lakes, say around 60 knots (give or take). I think your choice of the 65# is just fine.

In my case I have a 37' boat, 30,000#. I use a 55# Rocna, and have never once dragged once set. And we've held through known 50+knot storms. When I buy a new anchor I might go one size larger, but no more ... not for my bower.
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Old 24-08-2016, 07:57   #10
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

Thanks guys.

I ended up ordering the 65lb size.
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Old 24-08-2016, 08:46   #11
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

That is a beautiful anchor, epic.

For other people who might read this thread I will comment- I have a 41 ft 21,000# Vessel with medium windage. I use a 45 pound CQR +60 feet of chain with lots of rode. Also a key item is my anchor sail since my boat likes to sail around anchor.

I have been anchored in 60 kt winds without dragging. Key to anchoring is your technique, the chain that follows the anchor, and the type of bottom you are in. New England has many places with a mud bottom and that works great. Thick grass and rock bottoms should be avoided if you expect a big blow.
Personally, I avoid over doing anything including anchor weight. I would hate to carry that much weight on the foremost point of the bow, as well as continuously stressing my windlass and ground tackle with a huge anchor.
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Old 24-08-2016, 13:50   #12
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

whatever the manufacturer recommends especially if you have comprehensive insurance
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Old 24-08-2016, 14:40   #13
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

You did read the chart, right? As it surely doesn't state that the 85 is too big. And if 20lb, or even 40lb makes a difference to your windlass, roller, or chain, then they're too small & weak. Especially given that it's easy to have 100lb of mud on your tackle when it first breaks free of the bottom.

Insert a bit of common sense into this (anchoring) equation for the momennt. When you do it should become readily apparent that what creates the highest loads when anchoring is; the wind, waves, & currents. Not the anchor, even if grossly oversized.
It has the least influence on the loadings of your ground tackle & vessel, of anything involved. The; bpat, rode, & weather being the bigger players.

If the anchor gets too heavily loaded... by these other items, then it'll simply lose it's bite on the sea bed, & drag. Thus relieving the load. And the only way it's influence on the load of things in your anchoring system will be the most powerful one, is if it gets hooked on an immovable object on the sea floor.
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Old 24-08-2016, 15:18   #14
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

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Thanks guys.

I ended up ordering the 65lb size.
Good choice. The next size up (85lb)would have been ridiculous on that size boat.

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Old 24-08-2016, 15:32   #15
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Re: 55 or 65lb Mantus Anchor for my 2015 Jeanneau 409?

Get the biggest anchor you can safely manage. The bigger the better, but it also depends on what equipment you have aboard to handle it. Do the 65 lb., if you can safely handle it.
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