Dometic Baystar Front Mount Hydraulic Steering

BayStar hydraulic steering allows you to install all of the safety, reliability and comfort of hydraulic steering onto your single engine vessel with a Coast Guard approved transom/HP rating
up to MAX 150 HP.  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. The systems are easy to install with “cut-to-length” tubing. Available in complete kits or by individual components. 

NOTICE! BayStar steering systems are not recommended for vessels with high steering loads. Some examples of vessels with high steering loads include Pontoon boats, Bass boats and vessels using high performance engines or 4-3/4” hub props. Customers should then consider upgrading to SeaStar/SeaStar PRO steering. This will reduce the steering effort due to the fact that SeaStar provides more output resulting in lower steering effort.

NOTICE!
Tilt helms HH4315-3 and HH4316-3 are available separately. Currently not available in kit form.

BayStar Steering Kits

BayStar Steering kits come complete with everything needed for an install, (some engines require additional kits and/or cylinder plate change, see application chart) the cylinder does not require the engine manufacturer drag link for connection. For your convenience two lengths of 20-ft cut to fit tubing are supplied with the HK4200A-3 and two lengths of 30-ft cut to fit tubing are supplied with the HK4230A-3 kit.

NOTICE! HC4645-3 compact cylinder is included in both BayStar steering kits. If your engine requires the use of a cylinder other than HC4645-3 or HC4658-3 (refer to application guide) then purchase of a replacement pivot plate will be required.

BayStar steering kit — HK4200A-3
Includes: BayStar helm, cylinder (HC4645-3), two 20' tube assemblies, and fluid.

BayStar steering kit — HK4230A-3
Includes: BayStar helm, cylinder (HC4645-3), two 30' tube assemblies, and fluid.

BayStar steering kit — HK4300A-3
Includes: BayStar helm, cylinder (HC4645-3), and fluid, NO tubing.

BayStar steering kit — HK4500A-3
Includes: BayStar Plus helm, cylinder (HC4645-3), and fluid, NO tubing. 

NOTE: Effort Reduction
Dometic has recently updated the BayStar cylinder. These updates include low friction main piston seals as well as low friction wiper and gland seals. If one chooses to further reduce steering effort, the following additional changes can be made:
• Consider plumbing the system using SeaStar steering hoses.
• Consider use of a BayStar Plus 1.4 cu.in. helm pump (HH4513-3/HH4514-3).
• Consider use of a BayStar 1.1 cu.in. helm pump (HH4311-3).  NOTE: Number of wheel turns will increase to 6.6 hard over to hard over.

Steps to Select Your BayStar system

1. Check helm dimension. Both the Standard and Tilt helms require a 3-inch (7 6mm) cut-out hole in the dash.

Standard helm part # HH4311-3 and HH4314-3		Seal kit = HP6032 HH4311-3 (1.1 cu.in.) Gives 6.5 wheel turns lock to lock. HH4314-3 (1.4 cu.in.) Gives 5.2 wheel turns lock to lock when using BayStar outboard cylinders.
Sport tilt helm part # HH4315-3		Seal kit = HP6032 Tilt mechanism kit = HA6123 HH4315-3 (1.4 cu.in.) Gives 5.2 wheel turns lock to lock when using BayStar outboard cylinders.
Sport Plus tilt helm part # HH4316-3		Seal kit = HP6032 Tilt mechanism kit = HA6423 HH4316-3 (1.4 cu.in.) Gives 5.2 wheel turns lock to lock.

2. Is the Splashwell wide enough?
The HC4645-3 / 47-3 / 48-3 / 58-3 require a minimum 21” (534 mm) Splashwell width.

NPT seal kit = HP4600 ORB seal kit = HP4601 Tee/bleeder kit = HF4202 Support rod/nut/clip = HP6050 Pivot plate see application guide

3. Is there enough room in the splashwell for full engine tilt?
Find the dimensions (B & C) of your splashwell. Check them against the minimum splashwell dimensions for full engine tilt for your engine and cylinder.

Motor well dimensions required for BayStar front mount outboard steering systems

	Cylinder Model #	# of Engines	A	B	C	Minimum Engine Center Distance
	HC4645-3 HC4647-3 HC4648-3 HC4658-3	1	21” (534 mm)	6” (153 mm)	5” (127 mm)	N/A
		2	Twin engine applications not available

NOTES
a) Ensure there is no interference between the BayStar cylinder rod and the splashwell boot or engine controls and cables.
b) Dimensional restrictions also apply to external motor mount brackets.
c) Ensure dimension ‘A’ maintained through full trim/tilt range.
d) Maximum transom thickness 3 inches (76 mm).
e) Engines less than 70HP may require up to an additional 1 inch (25 mm) of splashwell clearance.