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.
Using the boat length x 2 x 1.5 gives you 75 ft. However, 72 ft. will work. Use 5/16" line unless you frequently sail in strong winds and need/prefer 3/8' line. My preference is 8mm BZZZ line from New England Ropes, a very good single braid that flies through the blocks. Available on Ebay.
I bought 60' of 1/2 inch and it was barely enough, used it twice. It did work but decided to go smaller and longer. Went back and bought 70' of 3/8 inch and it works better. There is quite a bit more length with the 70' than you really need and I may trim it. I fly a 150 on a furler.
I still have the 60' of 1/2 inch Solid blue sta-set if you are interested. It sells for $2.40 a foot new.
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.