Yamaha 33 1980 Owner's Manual page 16

Y-33 2-3
2-2-1. The Rake of the Mast:
The rake of the mast should be determined according to the helm of the boat under sail. But you
may start with our recommended rake — 0.5 degrees.
Adjust the head stay and backstay to bring the mast in the position so that the distance between the
lower terminal fitting of the backstay and the hole of the backstay fitting reaches 500 mm/19 in 3/4
(see Fig. 10).
This is a temporary setting. Do not set up the stays too tight, rather start with slack stays.
You will have to check the rake after you have adjusted the tension on the head stay and backstay.
HEAD STAY
-MIDSTAY
(INNER FORE STAY)
UPPER SHROUD
LOWER SHROUD
BACKSTAY
Fig. 10
Fig. 11
r
2-2-2. The Adjustment of the Head Stay and Backstay:
Set up the head stay and backstay taut about evenly, and puii the stays by means of a spring bal
ance at right angles to them at the point of the height of 1 m 500/4 ft 11 in from the pins of their deck
fittings.
Adjust the turnbuckies so the head stay has 25 mm/1 in of play at 20 kg/44 lbs load and the
backstay has 35 mm/1 in 3/8 of play at the same load (see Fig. 12).
Secure the turnbuckie lockouts of the head stay and backstay.
PLAY
Fig. 12