Mast Halyard Block Replacement

A forum for discussing boat or trailer repairs or modifications that you have made or are considering.
Post Reply
User avatar
eodjedi
Engineer
Posts: 110
Joined: Fri Mar 24, 2017 7:25 pm
Sailboat: MacGregor 26M
Location: Glen Burnie, MD

Mast Halyard Block Replacement

Post by eodjedi »

Next issue of the day, I noticed that my Halyard Block is now severely bent downward. Most likely an issue occurred when hoisting up the mainsail using the winch. So now I need to replace the block with something a little more high end / sturdier. So what do you all recommend. What kind of working load range should I be looking at? I noticed BWYachts sells a Harken with a working load of 350 lbs. IMO that seems a bit weak.
User avatar
Jimmyt
Admiral
Posts: 3402
Joined: Sat Jul 18, 2015 9:52 am
Sailboat: MacGregor 26M
Location: Mobile AL 2013 26M, 60 Etec

Re: Mast Halyard Block Replacement

Post by Jimmyt »

Maybe I’m missing something. I raise the main by hand, and I’m not able to put anywhere near 350 lbs of pull on it. Is your main so hard to raise that you have to winch it up?
User avatar
Tomfoolery
Admiral
Posts: 6135
Joined: Tue Jul 05, 2011 7:42 am
Sailboat: MacGregor 26X
Location: Rochester, NY '99X BF50 'Tomfoolery'

Re: Mast Halyard Block Replacement

Post by Tomfoolery »

Jimmyt wrote:Maybe I’m missing something. I raise the main by hand, and I’m not able to put anywhere near 350 lbs of pull on it. Is your main so hard to raise that you have to winch it up?
Remember that the rope is doing a U-turn, so 200 lb of halyard pull at your hands is also 200 lb of halyard pull on the sail for 400 lb total block load.
User avatar
NiceAft
Admiral
Posts: 6702
Joined: Tue Feb 01, 2005 7:28 pm
Sailboat: MacGregor 26M
Location: Upper Dublin,PA, USA: 2005M 50hp.Honda4strk.,1979 Phantom Sport Sailboat, 9'Achilles 6HP Merc 4strk

Re: Mast Halyard Block Replacement

Post by NiceAft »

I was in the trucking industry for years. A simple rule we went by when purchasing a new truck was to figure out what the maximum weight we would be carrying, and then purchase a vehicle with greater capacity.

If you believe that 350 is insufficient, go for higher. I question why you need to use a winch to raise the main? It should not be that difficult.

There have been threads about how some here have had difficulty raising the main the last four or five inches. The solution for me was using the topping lift to raise the end of the boom up a few inches. The main went up much easier. I now make certain the boom is raised at an acute angle before raising the main. I have no need to use the winch.

Before I led all lines aft, I used a “truckers hitch” for those last few inches.

Ray
dxg4848
First Officer
Posts: 228
Joined: Wed Feb 13, 2013 6:58 am
Sailboat: MacGregor 26M
Location: Cleveland, OH; 2009 26M; 60HP Etec

Re: Mast Halyard Block Replacement

Post by dxg4848 »

I use main with sail slugs and apply SailKote to sail slugs and mast groove (after washing it with cleaner) at the beginning of each season. This way I can easily raise main all the way up by hand all season long.

If you are using bolt rope consider replacing it with sail slugs.
Interim
First Officer
Posts: 296
Joined: Thu May 08, 2014 7:31 am
Sailboat: MacGregor 26S
Location: Great Plains

Re: Mast Halyard Block Replacement

Post by Interim »

Do the math on your loads at the head, tack, and clew.

On my 26S, I am building my outhaul for 500lbs max load (breaking point is of course higher than that).

Try this for some good leads: https://www.riggingdoctor.com/life-aboa ... ting-loads

--john
User avatar
eodjedi
Engineer
Posts: 110
Joined: Fri Mar 24, 2017 7:25 pm
Sailboat: MacGregor 26M
Location: Glen Burnie, MD

Re: Mast Halyard Block Replacement

Post by eodjedi »

I installed a BWYachts downhaul line which caused more issues than anything else. The slug upgrade I received from them had plastic dividers on the rings themselves which created massive amounts of friction when threading a down-haul line through them. I only threaded the line through three slugs but it still created a lot of friction when pulling the main sail up. I've since then taken a razor blade and cut off the little dividers. I've attached a photo of what I'm referring too.

Image

Thanks for the topping lift tip, I'll definitely do that the next time I raise the sail.
User avatar
sailboatmike
Admiral
Posts: 1597
Joined: Thu Mar 12, 2015 10:17 pm
Sailboat: MacGregor 26X
Location: Australia

Re: Mast Halyard Block Replacement

Post by sailboatmike »

eodjedi wrote:I only threaded the line through three slugs but it still created a lot of friction when pulling the main sail up. I've since then taken a razor blade and cut off the little dividers. I've attached a photo of what I'm referring too.

Image

Thanks for the topping lift tip, I'll definitely do that the next time I raise the sail.
The downhaul only needs to be attached through one point, no need to thread it through, just a 3mm / 1/8" line would do the job
User avatar
Highlander
Admiral
Posts: 5995
Joined: Wed Sep 21, 2005 8:25 pm
Sailboat: MacGregor 26M
Location: Maccutter26M 2008 75HP Merc. 4/S Victoria BC. Can. ' An Hileanto'ir III '
Contact:

Re: Mast Halyard Block Replacement

Post by Highlander »

check ur mast grove & make sure there,s not a dent in it causing the main sail to jam !
J 8)
Post Reply