SEASTAR and BAYSTAR Hydraulic Steering Systems
6-3
TUBING DIAMETER
WHEEL CYLINDER CYL. TO FARTHEST HELM MAX
VESSEL SIZE HELM PUMP TURNS MODEL <40’ >40’ HPor AREA
Planing Hulls:
35–50’ (11–15m) H-21 or H-25 5.0 HC5350 or HC5356 1/2" 5/8" 450 HP
40–50’ (12–15m) H-21 or H-25 6.8 HC5351 or HC5357 1/2" 5/8" 750 HP
40–50’ (12–15m) H-42 4.7 HC5351 or HC5357 1/2" 5/8" 750 HP
45–60’ (14–18m) H-42 7.4 HC5378 or HC5379 1/2" 5/8" 950 HP
45–60’ (14–18m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 950 HP
55–65’ (17–20m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 1200 HP
To 70’ (To 21m) H-41 10.8 2 x HC5378 or HC5379 1/2" 5/8" 1500 HP
To 70’ (To 21m) H-41 14.2 2 x K-8 1/2" 5/8" 1500 HP
Displacement Hulls—Tug Boats, Net Haulers:
To 30’ (To 9m) H-21 or H-25 5.0 HC5350 or HC5356 1/2" 5/8" 200 HP
30–35’ (9–11m) H-21 or H-25 6.8 HC5351 or HC5357 1/2" 5/8" 250 HP
30–35’ (9–11m) H-42 4.7 HC5351 or HC5357 1/2" 5/8" 250 HP
26–40’ (8–12m) H-42 7.4 HC5378 or HC5379 1/2" 5/8" 400 HP
26–40’ (8–12m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 400 HP
30–45’ (9–14m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 150 HP
To 50’ (To 15m) H-41 10.8 2 x HC5378 or HC5379 1/2" 5/8" 500 HP
To 50’ (To 15m) H-41 14.2 2 x K-8 1/2" 5/8" 500 HP
To 50’ (To 15m) H-41 20.0 2 x K-9 1/2" 5/8" 500 HP
Displacement Hulls—Work and Pleasure Boats:
To 40’ (To 12m) H-21 or H-25 5.0 HC5350 or HC5356 1/2" 5/8" 300 HP
40–45’ (12–14m) H-21 or H-25 6.8 HC5351 or HC5357 1/2" 5/8" 350 HP
40–45’ (12–14m) H-42 4.7 HC5351 or HC5357 1/2" 5/8" 350 HP
40–55’ (12–17m) H-42 7.4 HC5378 or HC5379 1/2" 5/8" 500 HP
40–55’ (12–17m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 500 HP
45–65’ (14–20m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 650 HP
To 75’ (To 32m) H-41 10.8 2 x HC5378 or HC5379 1/2" 5/8" 750 HP
To 75’ (To 32m) H-41 14.2 2 x K-8 1/2" 5/8" 750 HP
Sail Boats—Skeg Rudder:
To 40’ (To 12m) H-21 or H-25 5.0 HC5350 or HC5356 1/2" 5/8" 9’ (.9m)
40–45’ (12–14m) H-21 or H-25 6.8 HC5351 or HC5357 1/2" 5/8" 10’ (1m)
40–45’ (12–14m) H-42 4.7 HC5351 or HC5357 1/2" 5/8" 10’ (1m)
40–52’ (12–16m) H-42 7.4 HC5378 or HC5379 1/2" 5/8" 17’ (1.6m)
40–52’ (12–16m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 17’ (1.6m)
50–60’ (15–18m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 18’ (1.7m)
To 65’ (To 20m) H-41 10.8 2 x HC5378 or HC5379 1/2" 5/8" 20’ (1.9m)
To 65’ (To 20m) H-41 14.2 2 x K-8 1/2" 5/8" 20’ (1.9m)
Sail Boats—Spade Rudder:
To 40’ (To 12m) H-21 or H-25 5.0 HC5350 or HC5356 1/2" 5/8" 7’ (.6m)
40–45’ (12–14m) H-21 or H-25 6.8 HC5351 or HC5357 1/2" 5/8" 8’ (.7m)
40–45’ (12–14m) H-42 4.7 HC5351 or HC5357 1/2" 5/8" 8’ (.7m)
35–46’ (11–14m) H-42 7.4 HC5378 or HC5379 1/2" 5/8" 15’ (1.4m)
35–46’ (11–14m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 15’ (1.4m)
40–50’ (12–15m) H-41 5.4 HC5378 or HC5379 1/2" 5/8" 15.5’ (1.4m)
To 60’ (To 18m) H-41 10.8 2 x HC5378 or HC5379 1/2" 5/8" 16.5’ (1.5m)
To 60’ (To 18m) H-41 14.2 2 x K-8 1/2" 5/8" 16.5’ (1.5m)
Hynautic 3-Line Inboard Steering
Application Guide
3-LINE INBOARD STEERING
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