Harken 7412.13 12V MKIV Electric Jib Reefing & Furling - Manual (Page 27)

Commissioning Turnbuckle on Boat
MKIV Unit 2E, 3E 27
Have extra cotter pins and locknuts on hand to replace used
ones at base of unit and for turnbuckle.
Hold foils and loosen foil clamp screws until you can pull clamp
out to lower foils.
Lower foils.
Remove link plates.
Adjust turnbuckle.
Replace used cotter pins and locknuts. Lower unit and install
clevis pin and new cotter pin.
Lift foils so top is below upper terminal.
CAUTION! Make sure drum assembly and foils are
securely lifted using a halyard before adjusting
turnbuckle. Foils can drop suddenly causing
injury to hands.
Raise lower unit and use
halyard to lift and hold it
about 5' (1.5m). Raise foils
using second halyard and
secure. Allow room above
for turnbuckle take up.
Unit
2E 5 / 8 " (16 mm)
3E 1" (25 mm)