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Masthead sheave upgrade
Posted: Sat Feb 10, 2018 6:20 pm
by Mvallus
Has anyone upgraded their masthead sheaves from the original delrin (I think) sheave? I ordered the aluminum version from RigRite, but they are much heavier and I really do not want 10X more the weight aloft. This was the closest I could find via Harken:
http://www.harken.com/productdetail.asp ... &taxid=396
Original: FM2C Masthead Sheave w/ 12mm ID - Aluminum: NG2-3AB12
http://www.rigrite.com/Spars/Sparcraft_ ... 5_mast.php
Phoenix 251
Re: Masthead sheave upgrade
Posted: Sat Feb 10, 2018 7:29 pm
by Vento Solare
I replaced mine with black delrin last year. Make sure to use stopper balls on the halyards to prevent shackles from damaging the sheaves.
Re: Masthead sheave upgrade
Posted: Wed Aug 01, 2018 9:18 pm
by JohnGreifzu
Are the jib halyard and spin halyard sheaves the same ones? Rig tite part NG2-3B12?
Re: Masthead sheave upgrade
Posted: Wed Aug 01, 2018 9:28 pm
by Vento Solare
John,
I don't think they are. On the class website menu mouse over Info and click on Drawings & Manuals. In the Equipment Manuals section look for the Charleston Spar (Sparcraft) J/109 Mast Manual – 6/10/2009. It has a very good illustrated parts summary.
Re: Masthead sheave upgrade
Posted: Wed Aug 01, 2018 9:42 pm
by JohnGreifzu
Figured it all out:
2xNG2-3B12 (spin halyard sheaves)
2xNG1-4 (jib box sheave)