MKIV Ocean Unit 1
3
2. Harken does not recommend drilling boat’s chainplate or toggle. In some cases bushings are available
to fit boats with smaller clevis pin sizes.
3. Will drum fit on bow? See page 6. If necessary, use an additional toggle to slightly raise unit. To clear
anchor use a Harken Long Link Plate which can be cut to various lengths.
Sizing Check
Unit Part No.
Description
Wire Sizes
7511.10
MKIV OCEAN Unit 1
1/4", 9/32", 5/16"
6 mm, 7 mm, 8 mm
Rod Sizes
-8, -10, -12
5.72 mm, 6.35 mm, 7.14 mm
Toggle Part No.
Description
Chainplate Clevis Pin Size
7411.20 1/2
Eye/jaw reversible
1/2"
12.7 mm
7311.20 1/2
Jaw/jaw
1/2"
12.7 mm
7311.20 5/8
Stud/jaw
5/8"
15.9 mm
7311.21 1/2
Long link plate w/toggle
1/2"
12.7 mm
7311.21 5/8
Long link plate w/toggle
5/8"
15.9 mm
Chainplate Clevis Pin
Size Check
1. Check headstay and clevis pin dimensions in chart below.
WARNING! Do not drill boat's chainplate or toggle. This may result in rig failure. Use the correct
size toggle and clevis pin.
Preassembly
Sizing Check
10
11
8
12
13
14
15
