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MKIV furling systems are strong, lightweight and aerodynamic, with the performance and features Harken® is known for. Longevity, ease of use, and simplicity of installation are crucial components of the design sailing adventure.

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Drum Cover Assembly

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Part N° Description Quantity
HFG689 Top Cover Assembly w/Screws 1
HFS1060 ↳ Top Cover Screw (M5 x 8 x 12MM) 2
H-35025D ↳ Top Cover
Special Order 		2
HFG690 Bottom Flange Assembly w/Screws 1
H-35465C ↳ Flange 2
HFS1060 ↳ Bottom Flange Screw (M5 x 8 x 12MM) 2



Drum Guard Assembly

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Part N° Description Quantity
HFG691 Guard Assembly 1
H-33758E ↳ Guard Set
 2
HFS873 ↳ Guard Screw (M8 x 1.25 x 50MM SHCS) 2



Drum Torque Tube

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Part N° Description Quantity
DIAGRAM 3 - HARKEN MKIV UNIT 1 HFG697 Clamp with Screws 1
H-42346 ↳ Clamp
Special Order 		1
HFS747 ↳ Clamp Screw (M6 x 1 x 16MM SHCS) 4



Hub Assembly

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Part N° Description Quantity
7412.10BASE Hub Assembly 1
H-33860A ↳ Ball Plugs 5
MP-127 ↳ Torlon Ball Bearing
Special Order 		25
MP-123 ↳ Delrin Ball Bearing
Special Order 		100
HCP1707 ↳ IGUS® Crosspin Bushing
Special Order 		2



Rod Adapter Stud

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Image Ref. Part N° Description Quantity
- 7424-12 Rod Adapter Stud w/Nosepiece (-12) Special Order 1
1 H-41531 ↳ Stud (Main Body)
Special Order 		1
2 H-41527 ↳ Nosepiece (-12)
Special Order 		1
3 HFG193 ↳ Cotter Pin (3/32" x 1" 18-8)
Special Order 		2
- 7425-17 Rod Adapter Stud w/Nosepiece (-17) 1
1 H-41531 ↳ Stud (Main Body)
Special Order 		1
2 H-41526 ↳ Nosepiece (-17)
Special Order 		1
3 HFG193 ↳ Cotter Pin (3/32" x 1" 18-8)
Special Order 		2
- 7426-22 Rod Adapter Stud w/Nosepiece (-22) 1
1 H-41812 ↳ Stud (Main Body)
Special Order 		1
2 H-41811 ↳ Nosepiece (-22)
Special Order 		1
3 HFG319 ↳ Cotter Pin (3/32" x 1 3/4")
Special Order 		2
4 HFG303 ↳ Stud Cap (7/8" ID x 5 1/2 RED)
Special Order 		1



Eye/Jaw Toggle (sold separately)

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Diagram Ref. Part N° Description Quantity
- 7412.20 5/8 Eye/Jaw Toggle Reversible 1
1 H-37647C ↳ Toggle
Special Order 		1
2 H-42398 ↳ Crosspin (7/16" x 3 9/32" 18-8) 1
3 HFS1005 ↳ Nylon Washer 2
4 H-42045 ↳ Cross Hole Plug
Special Order 		2
5 H-42397 ↳ Clevis Pin (5/8" x 1 1/2" 18-8) 1
6 HFS203 ↳ Cotter Pin (5/32" x 1 1/4" 18-8) 1
7 HFS220 ↳ Cotter Pin (1/8" x 1" 18-8) 1
- 7312.20 5/8 Jaw/Jaw Toggle 1
1 H-42316 ↳ Toggle
Special Order 		1
2 H-42398 ↳ Crosspin (7/16" x 3 5/16" 18-8) 1
3 H-42397 ↳ Clevis Pin (5/8" x 1 1/2" 18-8) 2
4 HFS203 ↳ Cotter Pin (5/32" x 1 1/4" 18-8) 2
5 HFS220 ↳ Cotter Pin (1/8" x 1" 18-8) 1
6 HFS1005 ↳ Nylon Washer 2
- 7312.20 3/4 Stud/Jaw Toggle 1
1 H-41489 ↳ Toggle
Special Order 		1
2 H-42398 ↳ Crosspin (7/16" x 3 5/16" 18-8) 1
3 H-42403 ↳ Clevis Pin (3/4" x 1 13/16" 18-8) 2
4 H-43210 ↳ Stud
Special Order 		1
5 HFS203 ↳ Cotter Pin (5/32" x 1 1/4" 18-8) 3
6 HFS220 ↳Cotter Pin (1/8" x 1" 18-8) 1
7 HFS1005 ↳ Nylon Washer 2



Long Link Plate w/Toggle (sold separately)

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded view Diagram Ref. Part N° (for 5/8" Toggle) Part N° (for 3/4" Toggle) Description Quantity
DIAGRAM 7 - HARKEN MKIV UNIT 1 - 7312.21 5/8 7312.21 3/4 Long Link Plate w/Toggle 1
1 H-41300 H-41489 ↳ Toggle
Special Order 		1
2 H-41304 H-41304 ↳ Strap
Special Order 		2
3 H-41302 H-41525 ↳ Upper Clevis Pin (Custom)
Special Order 		1
4 H-42397 H-42403 ↳ Lower Clevis Pin 1
5 H-41497 H-41497 ↳ Isolator
 2
6 HFS203 HFS203 ↳ Cotter Pin
 2
7 HFS937 HFS937 ↳ Nylon Locking Nut (M12)
 2
8 HFS336 HFS336 ↳ Allen Cap Screws (M8x1.25x16 A4 SHCS) 4
9 833 833 ↳ Loctite Blue
Special Order 		1



Foils, Swivel & Connectors

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded View Part N° Description Quantity
HFG681 Trim Cap Set w/o Screws 1
HFG672 Trim Cap Screw Set 1
HFS1127 ↳ Trim Cap Screw 3
H-39794 Halyard Swivel w/o Shackles 1
MP-127 ↳ Torlon Ball Bearings
Special Order 		96
H-38028A ↳ Clip/Smalley Ring
Special Order 		2
7412.FOILSET.BLACK Foil Set, Black
Special Order 		1
7412.30.BLACK ↳ Foil (7' / 2.13 m) Luff, Black Anodized
Special Order 		6
7412.33.BLACK ↳ Foil (2' / 610 mm) Bottom, Black Anodized
Special Order 		1
7412.FOILSET.CLEAR Foil Set, Clear
Special Order 		1
7412.30.CLEAR ↳ Foil (7' / 2.13 m) Luff, Clear Anodized
Special Order 		6
7412.33.CLEAR ↳ Foil (2' / 610 mm) Bottom, Clear Anodized
Special Order 		1
HFG348 Foil Screw Set 1
HFS1106 ↳ Foil Screw 38
HFG626 Connector Set w/o Bushings 1
- ↳ Connector (9/229 mm) 7
- ↳ Connector Bottom (13/330 mm) 1
HFG296 Connector Bushing Set 1
H-42032 ↳ Connector Bushing (Curved/Longer) 12
H-42033 ↳ Connector Bushing (Flat/Shorter) 12
7412.31 Connector w/ Bushings, Foil Screws, and Wedges 1
- ↳ Connector (9/229 mm) 1
- ↳ Connector Bushing (Curved/Longer) 2
- ↳ Connector Bushing (Flat/Shorter) 2
- ↳ Foil Screw 4
- ↳ Connector Wedge 2
7411.32 Connector w/ Bushings Bottom 1
- ↳ Connector Bottom (13/330 mm) 1
- ↳ Connector Bushing (Curved/Longer) 2
- ↳ Connector Bushing (Flat/Shorter) 2
HFG300 Connector Wedge Set 1
H-39487 ↳ Connector Wedge 18
H-39559 Feeder Set 1
H-33931B ↳ Feeder
Special Order 		1
HFS1129 ↳ Feeder Screw 1
H-35671A ↳ Tab 1


 

Extra Tools

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded View Part N° Description Quantity
Extra Tools Diagram
4418 Instruction Manual
Special Order 		1
947 Prefeeder 1
HFG739 Loctite® Red
Special Order 		2
HFG725 5200 Adhesive Set
Special Order 		1
HFG722 ↳ 5200 Marine Adhesive Sealant
Special Order 		1
HFG200 ↳ Injector #1
Special Order 		1
HFG201 ↳ Injector #2
Special Order 		1
2117 7 mm Double Braid Polyester (70' / 21.3 m)
 3
HFG235 Bow Shackle (8 mm)
 1


Additional Accessories

Note: Click on your preferred part no. or scroll down to purchase. If it's a Special Order item, click on the part number and request it through the Contact Us form. A customer care agent will follow up shortly.

Exploded View Part N° Description Quantity
7404 Lead Block Kit
Special Order 		1
7403 ↳ 29 mm Outboard Lead Assembly
Special Order 		3
7402 ↳ 57 mm Carbo Ratchet Assembly
Special Order 		1
7401 ↳ 40 mm Carbo Assembly
Special Order 		1
HCP168 ↳ Horn Cleat
Special Order 		1
945 Halyard Restrainer

1
945ASSY ↳ Sheave/SS Inner Race Only
Special Order 		1
SP-038 ↳ Clevis Pin (5/16" x 11/4" 18-8) 
Special Order 		1
HCP394 ↳ Bracket-Small
Special Order 		1
HFS181 ↳ Cotter Pin (3/32" x 3/4" 18-8)
Special Order 		1
7303 Halyard Deflector 1
- Hex Keys -
HFG644 ↳ 6 mm Hex Key
Special Order 		1
HFG643 ↳ 5 mm Hex Key
Special Order 		1
HFG640 ↳ 4 mm Hex Key 1
HCP1089 ↳ 3 mm Hex Key
Special Order 		1

 

 

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