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Seafirst Inboard Steering Cylinder Rams

Marine Tough Hydraulic Steering Cylinders
Seafirst Inboard Steering Cylinder
  • Industry-standard patterns made with 100% stainless, bronze, and brass construction
  • Cylinder rod made from non-magnetic SS pump shafting - hard chrome plated and ground
  • Over-sized SS ball joint w/ stainless inserts for smaller high-strength bolts for better clearance
  • Designed with 3/8" NPT ports for low-restriction fluid flow (125 C & 150 C / 1/4" NPT)
Image Model Bore
(nominal)
inch
Stroke
inch
Displacement
Volume
cubic inch
Typical Applications Purchase
Seafirst Inboard Steering Cylinder HC 125 B-7C

1 ¼ 7 6.5 EXACT Hynautic K-51 Fit with 30% less turns
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Seafirst Inboard Steering Cylinder HC 150 B-5

1 ½ 5 7.3 WAGNER N-40-120 or other short stroke Heavy Duty applications / Jet Boats
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Seafirst Inboard Steering Cylinder HC 150 B-7

1 ½ 7 10.2 Heavy Duty replacement for Teleflex/Seastar HC5318 / BA 150-7
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Seafirst Inboard Steering Cylinder HC 150 B-7C

1 ½ 7 11.4 EXACT Hynautic K-51 Fit
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Seafirst Inboard Steering Cylinder HC 150 B-9

1 ½ 9 13.1 Heavy Duty replacement for Hynautic K1-B, Teleflex HC 5369 / BA 150-9
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Seafirst Inboard Steering Cylinder HC 175 B-7C

1 ¾ 7 13.8 Compact HD 1.75" Bore cylinder-HD Replacement for Teleflex HC 5319 / BA175-7
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Image Model Bore
(nominal)
inch
Stroke
inch
Displacement
Volume
cubic inch
Typical Applications Purchase
Seafirst Inboard Steering Cylinder HC 200 B-7

2 7 16 Heavy Duty replacement for Teleflex / Seastar BA 200-7 or Jastram B 200-7
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Seafirst Inboard Steering Cylinder HC 200 B-9

2 9 20.5 Heavy Duty replacement for Hynautic K3-B, Teleflex / Seastar HC5802 or Jastram B 200-9
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Seafirst Inboard Steering Cylinder HC 200 B-11

2 11 25.1 Heavy Duty replacement for Teleflex BA 200-11, Jastram B 200-12 or upgrade for Hynautic K-31
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Seafirst Inboard Steering Cylinder HC 250 B-9

2 ½ 9 36.6 Heavy Duty replacement for Hynautic K4 or K8
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Seafirst Inboard Steering Cylinder HC 250 B-11

2 ½ 11 44.8 Heavy Duty Brass & Stainless replacement for Teleflex (steel HC 0328)
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Marine Tough Hydraulic Steering Cylinder Seal Kits
Image Model Description Purchase
Hydraulic Steering Cylinder Seal Kits SK 12 Seal kit for 1.25" bore cylinders
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Hydraulic Steering Cylinder Seal Kits SK 15 Seal kit for 1.5" bore cylinders
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Hydraulic Steering Cylinder Seal Kits SK 20 Seal kit for 2.0" bore cylinders
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Hydraulic Steering Cylinder Seal Kits SK 25 Seal kit for 2.5" bore cylinders
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