Baystar Compact Cylinder for up to 150hp

SKU: HC46 Categories: ,


This balanced cylinder features a compact design that fits most splashwells. BayStar allows you to install all of the safety, reliability and comfort of hydraulic steering onto your boats rated up to MAX 150hp. Combine this with the superior design, rigid ISO quality control, the finest materials and precision manufacturing – BayStar continues the tradition bringing comfort and safety to boating.

NOTE: Mercury Optimax should use SeaStar cylinders. Not recommended for use on high performance engines.

Select from one of the available options:
HC4645-3  (BayStar Outboard Standard Cylinder)
HC4647-3 (BayStar Outboard Cylinder rated to 150hp – HONDA 115/130)
HC4648-3 (BayStar Outboard Cylinder rated to 150hp – Short Plate)

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Additional information

Weight2 kg

Baystar Information

BayStar™˙hydraulic steering is brought to you by the manufacturers of SeaStar®, the most trusted name in pleasure boat steering. BayStar allows you to install all of the safety, reliability and comfort of hydraulic steering onto your boats rated up to MAX. 150HP as rated by the engine manufacturer. Combine this with the superior SeaStar Solutions design team, rigid ISO quality control and teamed with the finest materials and precision manufacturing—BayStar continues the tradition bringing comfort and safety to boating.

The BayStar steering system consists of a super low friction helm for smooth comfortable steering, a balanced cylinder–featuring a compact design that fits most splashwells. For your convenience two lengths of 20’ cut to fit tubing are supplies (2 x 20’ length), two bottles of hydraulic steering fluid, and one fill tube for easy fill and purge.

BayStar is NOT recommended in applications with high steering effort (i.e. such as those using high performance engines or boats capable of attaining high speeds), customers should consider upgrading the system to SeaStar/SeaStar Pro steering . This will reduce the steering effort due to the fact that SeaStar steering provides more output power resulting in lower steering effort.

• Patented No FeedBack™ Steering lock valves.
• 5 turns lock-to-lock.
• Up to 150 horsepower (total).
• Available either as separate components or as a complete system ready to install.
• Fixed cylinder.
• BayStar hydraulic tubing cut to suit application.
• Tilt option available.
• Requires 3” (76mm) cut-out hole in dash.
• Requires 21” (534mm) splashwell width.

DO NOT use BayStar on smaller HP outboard engines that use wing nut type transom mount clamping screws.

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Application Guide

(Cylinders HC4645H/47H/48H/58H)

1991-DATE115 HP FICHTHC4658-3See Note 4

1991-Date40-150 HP inc.E-TecHC4645-3See Note 2

HONDA1992–DATE30–50 HPHC4645-3See Note 2
1996-DATE75-90 HPHC4645-3
1998-2010115-130 HPHC4647-3
2003–DATE135-150 HPHC4645-3
2010-DATE115 HPHC4645-3
JOHNSON / EVINRUDE1991–DATE40-150 HP inc. E-TecHC4645-3See Note 2
1997–DATE115 HP FICHTHC4658-3See Note 4
1997–DATE75–150 HP FICHTHC4645-3See Note 5
1998–DATE40–140 HP 4-StrokeHC4658-3See Note 1, 2, 4
MERCURY/MARINER1984–DATE75–150 HPHC4645-3See Note 5
1998–DATE40–60 HPHC4648-3See Note 1, 2
SELVA2000-DATE25-70 HPHC4648-3See Note 1, 2
2000-DATE90-150 HP 4-StrokeHC4645-3See Note 5
2011-2013115 HPHC4658-3
SUZUKI1986–DATE150 HPHC4645-3See Note 5
1987–2002115–140 HPHC4645-3See Note 1
1990–200090–100 HPHC4645-3
1998–DATE40–70 4-StrokeHC4645-3See Note 1, 2
2001–DATE90-140 HP 4-StrokeHC4658-3See Notes 1, 4
TOHATSU1990–DATE40–140 HPHC4645H
YAMAHA1998–DATE40–50 HPHC4645-3See Note 2
1998–DATE60 HPHC4645-3See Note 3
1986–DATE70–90 HP 2-StrokeHC4645-3See Note 1
1997–DATE80–150 HP 4-StrokeHC4645-3See Note 5
2000–DATE25–70 HP 4-StrokeHC4648-3See Note 1, 2
2011–DATE70HP F115A inc. SHO 90 & 115 HPHC4658-3

1. Requires Spacer kit part # HO5090
2. Engine clamp brackets must be cut or ground, and the engine through bolted onto the transom, or interference will occur, restricting engine trim and tilt.
3. Steering hook Yamaha Part # 63D-48511-00-4D must be installed
4. Cylinder HC4645-3 may be used in these applications. The pivot plate will need to be flipped before installation.
Instructions provided with Owner’s Manual.
5. High performance 150 HP engines and any engine using a 4-3/4″ gear-case such as Command Thrust MUST use SeaStar.

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