Harken gross-trim/fine-tune mainsheet systems are easy to install and use. These optimized systems decrease overall line clutter because they use less line than traditional gross-trim/fine-tune systems. For fast trimming, pull both tails of the mainsheet. To fine-tune or to trim using a higher purchase, pull a single tail.
Two speed mainsheet systems come in three configurations for boats from 22 ft to 39 ft (6.5 m to 11.8m), with mains as large as 350 sqft (32.4 sqm).
*Line not included.
|Sheave Diameter (Primary)||3 in||76 mm|
|Sheave Diameter (Secondary)||2 1/4 in||57 mm|
|Sheave Diameter (Secondary)||1 3/4 in||44 mm|
|Minimum Line Size||5/16 in||8 mm|
|Maximum Line Size||3/8 in||10 mm|
|Max Mainsail Area (End Boom)||240 sq ft||22.3 sq m|
|Max Mainsail Area (Mid Boom)||180 sq ft||16.9 sq m|