O’DAY 25 RIGGING SPECS (Taken from a 1979 O’DAY memo)
(All Lengths and specifications are approximate and are subject to change without notice)

Main Halyard (rope) 5/16” x 59’ (K/CB)
5/16” x 64’ (Keel)

Jib Halyard (rope) 5/16” x 60’4” (K/CB)
5/16” x 63’4” (Keel)

Mainsheet 3/8” x 40’

Jib Sheet 3/8” x 48’ (24’ x 2)

Mainsail Outhaul ¼” x 9’

Boom Downhaul ¼” x 4’

Topping Lift (rope) ¼” x 31’ (K/CB)
¼” x 33’ (Keel)

Centerboard Pendant (need to find this)


Spinnaker Halyard 5/16” x 67’ (K/CB)
5/16” x 71’ (Keel)

Spinnaker Pole Lift 5/16” x 43’ (K/CB)
5/16” x 45’ (Keel)

Spinnaker Pole Downhaul 5/16” 30’ (K/CB)
5.16’ x 31’ (Keel)

Spinnaker Sheets 5/16” x 48’ (2)

Genoa Sheets 3/8” x 60’ (30’ x 2)

All running rigging is typically double-braid Dacron (Polyester) rope

Standing Rigging Specs.

Headstay 5/32” x 30’10” (K/CB)
5/32” x 32’10” (Keel)

Upper Shroud 5/32” x 28’9” (K/CB)
5/32” x 30’ 9” (Keel)

Lower Shroud 5/32” x 25’8 ½” (K/CB)
5/32” x 16’8” (Keel)

Backstay 5/32” x 32’8 ¼” (K/CB)
5/32” x 34’8” (Keel)
All Standing rigging is SS 1x19 type wire and lengths are with turnbuckle (where applicable) closed, from eye to eye (most riggers measure with turnbuckles half-closed, so be sure to note this and/or bring old rigging to rigger to measure for replacement)