Harken Yacht Equipment Catalog OnLine

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Reference > Outhaul Systems

Adjustable outhauls are important in shaping the mainsail. Upwind, a tight outhaul flattens the lower part of the main. Loosening the outhaul increases the draft, especially in the lower third, and is effective in light air or off the wind. Because outhauls must release freely when there is little load on the sail, use oversized blocks for very low friction. Avoid Magic Boxes.

Typical boat length:
Small Boat: 22' - 28' (6.7 - 8.5 m)
Midrange: 29' - 34' (8.8 - 10.4m)
Big Boat: 35' - 42' (10.7 - 12.8m)

Diagram Ref. Description Small Boat Part No. Midrange Part No. Big Boat Part No.

System 1

A Thru-deck 106/ 302 302 306

В Single 348/ 2650 099/ 2650 2650/ 2607

С Thru-deck 242/ 088 088/ 131 131/ 046

D Cam cleat 338 365/ 150 150

E Single 349/ 351 2651/ 2650 2650/ 2607

System 2

A Eyestrap 281/ 137 137/ 2129 137/ 1558

В Cheek 350/ 2644 2644/ 2606 2606

С Single 348/ 2650 2650/ 2607 2607

D Cam cleat 338/ 365 365/ 150 150

System 3

A Eyestrap 137/ 201 137/ 201 137/ 1558

В Fiddle 2655 2655/ 2621 2621/ 028

С Fiddle 2656 2656/ 2622 2622/ 030

D Thru-deck 302 306 306

E Thru-deck 242/ 088 106/ 046 106/ 310

F Cam cleat 338 338/150 150

System 4

A Eyestrap 137/ 201 137/ 201 137/ 1558

В Double 343/ 407 343/ 2639 2639/ 2603

С Triple 344/ 408 344/ 2640 2640/ 2604

D Traveler 2726/ 2727 2727/ 1508 1508/ 1509

E Thru-deck 302 306 306

F Thru-deck 242/ 088 106/ 288 288/ 047

G Cam cleat 338 338/150 150

System 5

A Clew block 371 6061 6061

В Traveler 249 1615 595

С Thru-deck 302 306 310

1. Suitable for dinghies or small keelboats. A flexible cable shackles to the sail and enters the boom through a wire block. Placing a block aft of the cleat allows the crew to pull from a variety of positions.

2. A simple external outhaul system. A cascade of two 2:1 tackles produces a 4:1 advantage.

3. This 4:1 internal outhaul is popular on small offshore boats.

4. A 6:1 internal outhaul system is popular on small-to-medium-sized offshore boats using a traveler car to carry the clew of the mainsail.

5. Mainsails that furl into the mast are loose footed and usually have a ball bearing outhaul car that rides the length of the boom. The outhaul starts at the car, leads through the clew block on the sail, back to the sheave on the car, and into the boom where it leads to a winch.

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