On ours, there is a through deck block that is inset within the boom so that 
the exit of the block lines up just below the centre of the boom. The main 
sheet is protected from the boom cut out by a stainless steel guard that is 
shown in the picture. Chaffing is a definite possibility based on the design.

Bruno Mannsberger
C&C37/40 R
Wave Train
Ladysmith BC


From: Josh Muckley via CnC-List<mailto:[email protected]>
Sent: August 25, 2016 7:33 AM
To: C&C List<mailto:[email protected]>
Cc: Josh Muckley<mailto:[email protected]>
Subject: Re: Stus-List Mainsheet 37/40

Evidently not the same on all 37+ or 37/40s.  Mine doesn't look anything
like that.  I can't quite tell from the picture where the chafe is
occurring but it kinda looks like the entry box (the place where it enters
the boom on the right side of the picture) is missing a sheave.

Josh Muckley
S/V Sea Hawk
1989 C&C 37+
Solomons, MD
On Aug 24, 2016 6:41 PM, "Brian Fry via CnC-List" <[email protected]>
wrote:

> My mainsheet enters the boom and is chafing at the entry point. There is
> another small block aft the pulls on the main sheet and seems to be causing
> The chafe. Is this standard on other C&Cs?
>
> http://i.imgur.com/tLfmXHf.jpg
>
> Brian Fry
> La Neige
> Havre de Grace MD
>
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