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990 AC Self-Tailing Racing Winch — 3 Speed 990 AC Self-Tailing Racing Winch — 3 Speed
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Grand Prix Self-Tailing

990 AC Self-Tailing Racing Winch — 3 Speed

Part No. B990.3STAC
  Not available on-line. Please contact your Harken dealer.
ConfigurationSelf-tailing AC
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Power ratio - 1 2.5:1
Power ratio - 2 24.8:1
Power ratio - 3 100:1

These powerful carbon winches are aboard large megayachts, performance cruisers, and racing monohulls and multihulls over 18 m (60 feet).

Winches feature carbon skirts and tops, aluminum drums, and strong composite jaws with one-piece sculpted line guide and peeler. PEEK® roller bearings are low-maintenance, reliable, and efficient. They ride in large-diameter cages, allowing more bearings to carry the load. Stainless steel drive gears are strong and durable. The AC versions of the 1111PT and 990.3ST winches feature titanium gears for extremely high strength-to-weight ratios and exceptional resistance to corrosion.

Drives are pedestal, electric, or hydraulic. Wide-diameter drums provide extra surface area to hold line securely under high loads. Fewer wraps speed line retrieval when sheeting.

Other options include self-tailing, top cleats, four speeds, free-spinning or ratcheting base sheave additions, and left-handed rotation.

If class rules dictate, winches are also available in all-aluminum with stainless steel gears.

ConfigurationSelf-tailing AC 
Drum Ø (mm)203 mm
Drum Ø (in)8 in
Base Ø (mm)332 mm
Base Ø (in)13 1/16 in
Height (mm)240 mm
Height (in)9 7/16 in
Line entry height (mm)98 mm
Line entry height (in)3 27/32 in
Minimum line Ø (mm)11 mm
Minimum line Ø (in) 7/16 in
Maximum line Ø (mm)19 mm
Maximum line Ø (in)3/4 in
Fastener circle (mm)305 mm
Fastener circle (in)12 in
Fasteners (mm)8 FH mm
Fasteners (in)5/16 FH in
Number of fasteners
Gear ratio - 1 1:1 
Gear ratio - 2 9.9:1 
Gear ratio - 3 40:1 
Power ratio - 1 2.5:1 
Power ratio - 2 24.8:1 
Power ratio - 3 100:1 
EPS: B990.3STAC.eps (open/save)
High-res JPG: B990.3STAC.jpg (open/save)

DO NOT use Harken equipment for human suspension unless product is specifically certified and labeled for such use.

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