Notice:
The advice given on this site is based upon individual or quoted experience, yours may differ.
The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.
I'm new to sailing as of last year. I have a 25 SR/SK. The halyards have been lead back to the cockpit, but I am having problems raising the main that I think are due to the size of the halyard (7/16"). Even when I pull down on the halyard at the mast., there is considerable resistance. When the mast was down I looked at the sheeves and they appeared to be just fine. I believe the correct size is 5/16". Can anyone confirm the size and tell me the length so that I can install the correct size and hopefully correct this problem?
Incidentally, this forum has been a huge resource for me as a new sailor! Great job!
5/16" is the proper size. Anything larger will be overkill. for the length of an all rope main halyard, I suggest 2x the length of the mast plus 10' if you are leading it back to the cockpit. A SR mast is 28', so 66' should be good for the halyard. Round up to 70' if you plan to secure the halyard to the lifelines when you dock the boat.
I clean and lube the track with SailKote every season - it works great and can be done with the mast up or down. Also, I use 1/4" Vectran-100 for the main and 5/16 for the genoa. Vectran was on sale when I replaced my halyards.
I added a new halyard to Doug's boat and two new ones to mine. We used 3/8 non-stretch line. I believe we used 76 feet on Doug's tall rig. I ordered 100 feet for each to have some spare line for taking up space in the dumpster.
Are the sheaves that look "just fine" the right size for your oversized rope? If they're original (for wire-to-rope halyards), that explains your resistance--7/16" won't fin in them at all. If they're Catalina Direct's replacement mast-head sheaves, they're intended for 5/16" halyards--yours might bind in them under tension.
The 5/16" halyard has been installed...problem solved. What a difference! When the halyard is released, the top 2/3 of the sail literally falls toward the boom...love it. Thanks for all the great feedback!
What is the maximum size soft line that the OEM wire halyard sheeve can handle? Mine sheeves appear to be in good shape and I'd like to convert to all rope while the mast is down.
The replacement sheaves aren't too expensive and if you look closely you may find that your existing ones aren't in great shape. The originals on my 1984 (that always lived in cloudy Seattle) were cracked around the hubs.
I think the originals will work best with 1/8", but will handle up to 1/4". One method for doing all rope would be to splice 1/8" dyneema (amsteel) to 1/4" rope and have the dyneema be on the loaded section that runs over the sheaves.
I like that idea, Alex. Does anyone know if WM splices their rope at the store or mail order? Most rope dealers do but I like to get as much done locally as I can.
Not sure, I have always done my splicing myself. In Seattle we're also blessed with a really great chandlery called Fisheries Supply, so I almost never go to West Marine.
The sheaves run $12-15 each, plus s/h, and you will need to replace all 4 to convert to all rope. It is well worth the money and, if your mast is already down, that's a great time to switch them out. You won't regret it.
Notice: The advice given on this site is based upon individual or quoted experience, yours may differ. The Officers, Staff and members of this site only provide information based upon the concept that anyone utilizing this information does so at their own risk and holds harmless all contributors to this site.