or 4 payments of 
Description
Baystar Compact Front Mount Hydraulic Steering Cylinder Outboard – Part No. HC4645H-3 Up to 150HP
Cylinder Capacities – SeaStar Solutions Part No. HC4645H (dash 3 – third generation)
Cylinder Model: Front Mount
Bore: 1.25″ / 31.7mm
Shaft Dia.: .625″ / 15.9mm
Stroke: 8″ / 203mm
Volume: 118.6cc / 7.2 cu in
Torque: N/A
INTRODUCTION
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 of bringing comfort and safety to boating.
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.
Features – Baystar Hydraulic Steering HC4645H
- Patented No FeedBack steering lock valves.
- 5.2 turns lock-to-lock.
- Up to 150 horsepower (total).
- Available either as separate components or as a complete system ready to install.
- Fixed cylinder.
- Requires 3″ (76mm) cut-out hole in dash (Helm)
- Requires 21″ (534mm) splashwell width.
CAUTION
DO NOT use BayStar on smaller HP outboard engines that use wing nut-type transom mount clamping screws.
Notice
Tilt Helm HH4315 is available separately. Currently not available in kit form.
APPLICATION GUIDE – Baystar Steering Cylinder
(Cylinders HC4645H/47H/48H/58H)
| MANUFACTURER | YEAR | MODEL | CYLINDER | NOTES |
| FORCE | 1985 to DATE | 90-150 HP | HC4645H | |
| HONDA | 1992-DATE | 30-90 HP | HC4645H | |
| 1998 – 2009 | 115-130 HP | HC4647H | ||
| 2001-DATE | 150 HP | HC4645H | ||
| 2003-DATE | BF135 HP | HC4645H | ||
| 2010-DATE | 115-150 HP | HC4645H | ||
| JOHNSON / EVINRUDE | 1977 – 1990 | 65-150 HP | HC4648H | |
| 1991 to DATE | 40-150 HP | HC4645H | ||
| 1997-DATE | 115 HP FICHT | HC4658H | See Notes 4, 5 | |
| 1997-DATE | 75-150 HP FICHT | HC4645H | ||
| 1998-DATE | 40-140 HP 4-Stroke | HC4658H | See Notes 1, 4 | |
| MERCURY/MARINER | 1984 to DATE | 75-150 HP | HC4645H | |
| NISSAN | 1990 to DATE | 120-140 HP | HC4645H | |
| SUZUKI | 1986 to DATE | 150 HP | HC4645H | |
| 1996 ONLY | 115-140 HP | N/A | ||
| 1987 – 2002 | 115-140 HP | HC4645H | See Note 1 | |
| 1990 – 2000 | 90-100 HP | HC4645H | ||
| 1998-DATE | 40-70 4-Stroke | HC4645H | See Note 1 | |
| 2001-DATE | 90-140 HP 4-Stroke | HC4658H | See Notes 1, 4 | |
| TOHATSU | 1990-DATE | 40-140 HP | HC4645H | |
| YAMAHA | 1998 to DATE | 40-50 HP | HC4645H | See Note 2 |
| 1998-DATE | 60 HP | HC4645H | See Note 3 | |
| 1986-DATE | 70-90 HP | HC4645H | See Note 1 | |
| 1997-DATE | 80-150 HP 4-Stroke | HC4645H | ||
| 2000-DATE | 25-60 HP 4-Stroke | HC4648H | See Note 1 | |
| 2010-DATE | 70HP 4-Stroke | HC4648H | ||
| 1997 – 2013 | 115A 4-STROKE | HC4658H | ||
| 2014 to DATE | 115B 4-STROKE | HC4645H | ||
| YANMAR | 1990 to DATE | 27-36 HP | HC4645H |
Notes
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 may be used in these applications. The pivot plate will need to be flipped before installation.
Instructions are provided with Owner’s Manual.
5. Johnson 115 HP 2-Stroke engines, require the pivot plate to be flipped. See Note #4.
BAYSTAR HYDRAULIC STEERING CYLINDER
Part# HC4645H, HC4647H, HC4648H and HC4658H
Balanced cylinder featuring a compact design that fits most splashwells.
Part# HC4600
(No Longer Available. Replacement parts are still available)
Balanced cylinder that fits most splashwells.
Additional Parts Available separately:
BAYSTAR HELM
Part# HH4314
Super low friction helm for smooth, comfortable steering.
BAYSTAR STEERING KITS – Also Available
Complete BayStar kit (291561) providing the flexibility to enable the installer the ability to make whatever hydraulic hose length required, without the need for specialist swaged fittings. The two unique re-usable brass end fittings allow the installer to simply cut the hose to length and insert the brass connectors.
The complete kit includes 50-foot length of outboard hose, BayStar helm, BayStar front mount cylinder, hydraulic oil, rubber boot and two re-usable hose fittings.
| Code | Description | |
|---|---|---|
| 291071 | Cylinder Capacities – SeaStar Solutions Part No. HC4645H Cylinder Model: Front Mount Bore: 1.25″ / 31.7mm Shaft Dia.: .625″ / 15.9mm Stroke: 8″ / 203mm Volume: 118.6cc / 7.2in3 Torque: N/A | |
| 291490 | Front Helm Pump – 1.4 Front MountDisplacement: 22.9cc / 1.4cu in Relief Valve Setting: 70bar / 1000psi | |
| 291902 | Hydraulic Oil – 1L | |
| 293001 | Adjustable Outboard Hose Kit – Rubber BootQty Req.: 1 | |
| 293050 | 50′ Seastar Standard Outboard Hose | |
| 297332 | Re-usable Hose Fitting. |
Cylinder Model: Front Mount Bore: 1.25" / 31.7mm Shaft Dia.: .625" / 15.9mm Stroke: 8" / 203mm Volume: 118.6cc / 7.2in3 Torque: N/A
