Harken Carbo Series User manual
ONLINE INSTRUCTIONS
40 mm, 57 mm, 75 mm Carbo®Ratchets
Strictly follow all instructions to avoid an accident, damage to your vessel, personal injury
or death. See www.harken.com for additional safety information.
A
B
C
Glass-filled nylon sideplates: load-carrying curved bearing
races.
Machined hardkote-anodized aluminum sheaves: strength
and corrosion resistance.
Fast trim: Free-running ball bearings.
Hand-hold and release loaded line: Faceted aluminum sheave
grips line securely. Ratchets provide mechanical advantage.
Multi-faceted Power3 sheaves: very aggressive holding power.
Ratchet on/off switch: 40 mm–2608/2609/2614;
57/75 mm–all blocks.
Ratchet always on: 2610/2611.
Cam arm locking plates: allows cam arms to be locked in more
than five positions for fair leads.
Cheek: line-shedding, small mounting footprint and drain holes.
Common uses: Main/jib/spinnaker sheets on dinghies and
sportboats; control lines on boats of all sizes.
Features
Part
No.
ABC
Max line
Ø
Maximum
working load*
Breaking
load*
Description in mm in mm in mm in mm lb kg lb kg
40 mm
2608 Single/swivel 1
9
/
16
40 3
3
/
8
86
5
/
32
4
3
/
8
10 300 136 1000 454
2609 Single/swivel/becket 1
9
/
16
40 4 102
5
/
32
4
3
/
8
10 300 136 1000 454
2610 Single/swivel/471 Carbo-Cam* 1
9
/
16
40 3
3
/
8
86
5
/
32
4
1
/
4
6 150 68 300 136
2611 Single/swivel/471 Carbo-Cam/becket* 1
9
/
16
40 4 102
5
/
32
4
1
/
4
6 300 136 600 272
2612 Triple/swivel/471 Carbo-Cam** 1
9
/
16
40 3
11
/
16
94
3
/
16
5
1
/
4
6 750 340 1500 680
2613 Triple/swivel/471 Carbo-Cam/becket 1
9
/
16
40 4
5
/
16
110
3
/
16
5
1
/
4
6 900 408 1800 816
2614 Cheek 1
9
/
16
40 2
3
/
4
70 — —
3
/
8
10 300 136 1000 454
2619 Triple/471 Carbo-Cam/29 mm/becket 1
9
/
16
40 4
3
/
4
121
3
/
16
5
1
/
4
6 900 408 1800 816
57 mm
2135 Single/swivel 2
1
/
4
57 4
1
/
16
103
3
/
16
5
3
/
8
10 500 227 2000 907
2166 Single/swivel/Power3/1.5x grip/titanium 2
1
/
4
57 4
1
/
16
103
3
/
16
5
3
/
8
10 500 227 2000 907
2169 Single/swivel/Power3/2x grip/silver 2
1
/
4
57 4
1
/
16
103
3
/
16
5
3
/
8
10 500 227 2000 907
2136 Single/swivel/becket 2
1
/
4
57 4
15
/
16
125
3
/
16
5
3
/
8
10 500 227 2000 907
2137 Cheek 2
1
/
4
57 3
1
/
4
83 — —
3
/
8
10 500 227 2000 907
2138 Single/swivel/150 Cam-Matic* 2
1
/
4
57 4
1
/
16
103
3
/
16
5
3
/
8
10 300 136 750 340
2139 Single/swivel/150 Cam-Matic/becket* 2
1
/
4
57 4
15
/
16
125
3
/
16
5
3
/
8
10 600 272 1500 680
2140 Triple/swivel/150 Cam-Matic*+2
1
/
4
57 4
1
/
16
103
3
/
8
10
1
/
4
6 1500 680 3750 1700
2141 Triple/swivel/150 Cam-Matic/becket 2
1
/
4
57 4
15
/
16
125
3
/
8
10
1
/
4
6 1800 816 4500 2041
2673 57 mm fiddle/ratchet 2
1
/
4
57 4
5
/
8
118
3
/
8
10
3
/
16
5 793 360 2380 1080
2674 57 mm/fiddle/ratchet/becket 2
1
/
4
57 5
5
/
8
143
3
/
8
10
3
/
16
5 793 360 2380 1080
2675 57 mm/fiddle/ratchet/150 Cam-Matic 2
1
/
4
57 4
5
/
8
118
3
/
8
10
3
/
16
5 793 360 2380 1080
2676 57 mm/fiddle/ratchet/150 Cam/becket 2
1
/
4
57 5
5
/
8
143
3
/
8
10
3
/
16
5 793 360 2380 1080
75 mm
2174 Single/swivel/Power3/1.5x grip/titanium 2
15
/
16
75 5
3
/
8
137
1
/
4
6
7
/
16
12 750 341 3000 1361
2176 Single/swivel/Power3/2x grip/silver 2
15
/
16
75 5
3
/
8
137
1
/
4
6
7
/
16
12 750 341 3000 1361
2670 Single/swivel 2
15
/
16
75 5
3
/
8
137
1
/
4
6
7
/
16
12 750 341 3000 1361
2671 Single/swivel/becket 2
15
/
16
75 6
1
/
2
165
1
/
4
6
7
/
16
12 750 341 3000 1361
2672 Cheek 2
15
/
16
75 4
1
/
16
103 — —
7
/
16
12 750 341 3000 1361
2694 75 mm/fiddle/ratchet 2
15
/
16
75 6
3
/
16
157
1
/
2
12
1
/
4
6 1212 550 3637 1650
2695 75 mm/fiddle/ratchet/becket 2
15
/
16
75 7
7
/
16
189
1
/
2
12
1
/
4
6 1212 550 3637 1650
2696 75 mm/fiddle/ratchet/150 Cam-Matic*++ 2
15
/
16
75 6
3
/
16
157
1
/
2
12
1
/
4
6 900 408 3350 1020
2697 75 mm/fiddle/ratchet/150 Cam/becket 2
15
/
16
75 7
7
/
16
189
1
/
2
12
1
/
4
6 1212 550 3637 1650
*Maximum working loads and breaking loads for blocks based on cam strengths.
**Can be used as becket block – add 281 eyestrap.
+Can be used as becket block – add 137 eyestrap and (2) HFS929 panhead screws (M5X45).
++ Can be used as becket – add 137 eyestrap.
IMPORTANT: See Inspection and Maintenance
at end of manual.
Do not apply a load greater than the maximum working load (MWL) of the Carbo®Ratchet blocks listed below.
Ratchet blocks allow hand holding loaded sheets. The eight-sided faceted sheave
grips loaded sheets yet allows a line to be eased instantly with control. They allow the
crew to hand hold main, jib, and spinnaker sheets with only a faction of the effort that
a regular block requires.
Holding power varies according to sheave size and type.
57 mm Ratchamatic blocks with eight-sided faceted sheaves can provide up to
10:1 holding power.
57 mm Power3 Ratchamatic blocks with added facets offer increased holding
power. See chart below.
75 mm Ratchamatic blocks with eight-sided faceted sheaves can provide up to
15:1 holding power.
Holding power ratios are determined using a 180° wrap angle and can very according to line
type, and line condition.
Using Ratchet Blocks
Power3 Ratchet Blocks - Holding Power
Power3 57 mm ratchet blocks offer three options of faceted holding power to best take advantage of
the day’s wind and wave conditions.
Ratchet Direction
Arrow on side of block shows direction that sheave
will spin when ratchet is switched on. Refer to arrow
when reeving block or mounting cheek block.
57/ 75 mm block no.Sheave color Holding power 57 / 75 * Sheave image and facet count**
2135 - 57 mm
2670 - 75 mm Black 10:1
15:1
Example: Block holds 45 kg (100 lb) load with 4.5 kg (10 lb) of effort
2166 - 57 mm
2174 - 75 mm
Titanium
(tan)
15:1
22:1
Example: Block holds 67.5 kg (150 lb) load with 4.5 kg (10 lb) of effort
2169 - 57 mm
2176 - 75 mm Silver 20:1
30:1
Example: Block holds 90 kg (200 lb) load with 4.5 kg (10 lb) of effort.
8 facets
60 facets
45 facets
Switches
An on/off switch allows the ratchet to be turned off in light air
to trim and ease lines more easily.
The 2608, 2609 and 2614 have on/off switches; other 40 mm
ratchet blocks are always in ratchet mode. All 57 and 75 mm
ratchet blocks have on/off switches.
*Holding power ratios are determined using a 180° wrap angle and can very according to line type, and line
condition. Depending on line composition and cover texture, the more aggressive sheave facets can increase
line wear.
**The 2170 block sheave has fewer facets than the 2167 and gains more holding power by having more
prominent ridges.
Switch Operation
2614 / 2137 / 2672 Cheek Block
Position block so ratchet turns in desired direction. Flip block to change direction. Use chart below or use
block as a template. Mark holes using centerpunch. Check marks with block before drilling. Remove block
and drill holes using drill size from chart below. Bevel top of deck holes using a small knife to allow seal-
ant to mass. Place gasket under block. Through-bolt block using recommended stainless steel fasteners,
washers and locknuts.
Ratchet cheek blocks include metric panhead screws, washers and nuts. See chart below:
Block
Part No. Size
Drill size Block thickness (G) Supplied mm size
fastener and lengthmm in mm in
2614 40 mm 3.25
1
/
8
22
7
/
8
M3 x 40 mm
2137 57 mm 4.25
11
/
64
25 1 M4 x 60 mm
2672 75 mm 5.25
13
/
64
31 1
1
/
4
M5 x 60 mm
*Fastener length: Add deck thickness and overhang for nut and washer.
Block
Size
Part
No.
A B C D E F
in mm in mm in mm in mm in mm in mm
40 mm 2614
5
/
64
4 1
1
/
2
38 — —
9
/
32
6.9 1
9
/
16
40 2
1
/
4
57
57 mm 2137
7
/
32
6 1
1
/
2
38
3
/
8
9.4
21
/
64
8.3 2
1
/
4
57 3
1
/
16
78
75mm 2672
9
/
32
7 2 51
1
/
2
12.7
31
/
64
12.4 2
15
/
16
75 4
1
/
16
103
2614
D
B A
F
E2137, 2672
D
B
E
A
C
F
2137, 2614, 2672 G
The 3-Way U-Lock on doubles and triples allows a change
of headpost direction from front to side or allows the
block to swivel. To change headpost direction, remove
shackle, turn post, install shackle. Remove U-Lock to
allow block to swivel.
1
1. Cam lever up.
Block locks in
front or side
position.
2. Cam lever down.
Block turns
freely.
2
3-Way U-Lock – 2140 / 2141 / 2612 / 2613 / 2619
3-Way Cam-Lock – 2135 / 2136 / 2138 / 2139 / 2170 / 2171, 2673,
2674, 2675, 2676, 2694, 2695, 2696, 2697
Part No.
HFS889
12
Adjust Cam Angle (Single/40 mm)
Reverse Cam Cleat (Single Only)
1. Remove screws from cam.
2. Assemble as shown. Note: use plastic plate on cam bottom.
3. Tighten screws. Do not overtighten screws or cams will
bind.
1. Loosen cam arm locking plate screw and pull outward to
disengage.
2. Rotate cam arm to desired position.
3. Press locking plate in and tighten screw. Do not overtighten
screws or sheave will bind.
1. Remove three cam arm screws on each side.
2. Carefully note position of three screw holes
in block (see diagram).
2. Rotate cam arm to desired position and line
up cam arm holes with screw holes on block.
3. Insert screws into screw holes and tighten.
Do not overtighten screws or sheave will
bind.
Adjusting Cam Angle 57 mm (Single/Triple/Fiddle), 75 mm (Fiddle)
General Maintenance- Harken equipment is designed for minimal maintenance. However, some
upkeep is required to give the best service and comply with the Harken limited warranty.
Keep your equipment clean and free-running by frequently flushing with fresh water. Periodically
clean with mild detergent and water solution. Spin sheaves to distribute soap solution evenly.
Flush with fresh water.
Important: Exposure to some teak cleaners and other caustic solutions can result in discoloration
of part and is not covered under the Harken warranty.
Warranty
For additional safety, maintenance, and warranty information see www.harken.com or the Harken
catalog.
Maintenance
Inspect Block and Shackle Before You Sail
Frequently inspect shackles and shackle posts for signs of corrosion, cracks, or elongation. When
replacing shackles, use the correct Harken parts to maintain the proper strength. Replace line as
necessary, taking into consideration the maximum size recommendation.
WARNING! Failure to inspect and replace damaged metal parts and/or worn or frayed line
can cause block or system to break suddenly causing an accident, damage to your vessel,
personal injury or death. See www.harken.com for additional safety information.
M1005 11/18
Flush block and attachments
frequently with detergent and
fresh water. Clean bearings by
flushing areas shown while
rotating sheave.
If block has cam cleat, flush balls
in cam cleats while rotating pawls.
Parts — 40 mm Carbo Ratchets
1 Nut M3 1 HFS939
2 Washer left 1 H-26265B
3 Washer right 1 H-27031B
4 Cam arm fastener M4X70
custom
1 HFS895
5 Cam arm 1 H-27052C
6 Cam nut M4 2 HFS890
7 Cam cleat, micro carbo 1 471
8 Micro flairlead black 1 424B
9Cam screw M4 X 30 slotted
panhead
2 HFS889
10 U-Lock 1 H-27808A
11 Shackle 5 mm hybrid shallow
bow
1 HCP1568
2612/2613 40 mm Triple Ratchet w/Carbo Cam
2
1
3
5
6
7
9
10
11
4
8
2610/2611 40 mm Single Ratchet
w/471 Carbo Cam
1 Screw M3X30 Slotted panhead 1 HFS888
2 Washer cam arm left 1 H-26265B
3 Washer cam arm right 1 H-27031B
4 Nut M3 1 HFS939
5 Cam arm left 1 H-46865
6 Cam arm right 1 H-46866
7 Nut M4 2 HFS890
8 Cam cleat micro Carbo 1 471
9 Micro flairlead black 1 424B
10 Cam screws M4X30 slotted
panhead
2 HFS889
11 Cam plate for reversing cam 1 H-27034B
12 Shackle assembly micro 5/32” 246
A Shackle strap 1 HSB104
BShackle clevis pin 5/32 X .488 1 HSB105
C Split ring 1 HSB24
2
1
4
5
6
7
8
9
10
11
12
B
A
C
Parts — 40 mm Carbo Ratchets
2608/2609 40 mm Single Ratchet
No. Description Qty Part No.
1Shackle Assembly Micro 5/32" 246
A Shackle strap 1 HSB104
BShackle clevis pin 5/32 X .488 1 HSB105
C Split ring 1 HSB24
1
A
C
B
2614 40 mm Cheek Block
1 M3-.5X40 mm slotted
panhead screw
3 HFS1014
2 Gasket 1 H-34924A
3 M3 flatwasher 3 HFS1008
4 M3 full nut 3 HFS939
1
2
33
44
2619 40 mm Triple Ratchet/29 mm/Carbo Cam
5
6
3
7
9
10
11
4
8
2
1
12
13 14
1 Nut M3 1 HFS939
2 Washer left 1 H-26265B
3 Washer right 1 H-27031B
4 29 mm 90 degree fixed block 1 352
5 Spring 1 097
6 Eyestrap, micro 1 281
7Cam arm fastener M4X70
custom 1 HFS895
8 Cam arm 1 H-27052C
9 Cam nut M4 2 HFS890
10 Cam cleat, micro Carbo 1 471
11 Micro flairlead black 1 424B
12 Cam Screw M4 X 30 slotted
panhead 2 HFS889
13 U-Lock 1 H-27808A
14 Shackle 5 mm hybrid shallow
bow 1 HCP1568
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