INSTRUCTION SHEET
2142, 2143, 2144, 2145, 2678, 2679, 2688, 2689
Strictly follow all instructions to avoid an
accident, damage to your vessel, personal
injury or death. See www.harken.com/
manuals for additional safety information.
Flip-Flop Blocks
Reeve
Line
Mount using ends to mark drill
holes. Make sure they are square
and against sheave assembly.
Use all four (4) fasteners with backing plates, washers
and locknuts. Deck or mounting surface must solid,
designed for block load. Consult with builder.
Mount with 4 (SH) Sockethead Cap or (PH) Panhead Screws
2142, 2143, 2144, 2145 #10 (5 mm)
2678, 2679, 2688, 2689
1
/4" (6 mm)
Adjusting Cam Angle
1
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. Avoid
binding sheave, do not
overtighten screw.
2