same day shipping clock icon
free shipping box icon
price tag icon

BayStar Outboard Cylinders

Ships by Next Business Day
List Price: $510.49
Starting At: $408.49
You save $102.00

Earn Captains Club Points Learn More


  • Choose Options


BayStar Outboard Cylinders

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 150 HP (total).  Combine this with the superior design, rigid ISO quality control and teamed with the finest materials and precision manufacturing – BayStar continues the tradition bringing comfort and safety to boating. 

** Mercury Optimiax should use SeaStar Cylinders 

 FORCE  1985–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  1977–1989  65–150 HP   HC4648H  
 1991–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–DATE  75–150 HP  HC4645H  
 NISSAN  1990–DATE  120–140 HP  HC4645H  
 SUZUKI  1986–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  115–140 HP 4-Stroke  HC4658H  See Notes 1, 4
 TOHATSU  1990–DATE  140–140 HP  HC4645H  
 YAMAHA  1998–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-DATE  115B 4-STROKE  HC4645H  
 YANMAR  1990–DATE  27–36 HP  HC4645H  



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 provided with Owner’s Manual.

5. Johnson 115 HP 2-Stroke engines, require the pivot plate to be flipped. See Note #4.

California Residents: warning sign WARNING Cancer and Reproductive Harm -




Google Product Type:


SeaStar Hydraulic Steering Kit w/o Hoses HK6400A-3
List Price: $1,560.99
Starting At: $1,248.99

SeaStar Hydraulic Steering Kit w/o Hoses For single and dual non-power-assisted outboard engines up to 350 HP (700 combined HP for counter-rotating duals) that have ABYC standard engine tilt lube...

Add to Cart
SeaStar Hydraulic Steering Kit
List Price: $1,693.19
Starting At: $1,430.99

SeaStar Hydraulic Steering Kit – Front Mount Pivot Cylinder System The Seastar Hydraulic Steering Kit provides everything marine technicians require to install/replace the steering system...

Choose Options
SeaStar BayStar Hydraulic Helm
List Price: $558.49
Starting At: $361.99

SeaStar BayStar Hydraulic Helm BayStar super low friction hydraulic helm for smooth, comfortable steering. BayStar hydraulic steering is brought to you by the manufacturers of SeaStar, the most...

Choose Options
Teleflex SHT91610 Back Mount Rack Dash Tilt Module
List Price: $290.49
Starting At: $200.49

Teleflex SHT91610 Back Mount Rack Dash Tilt Module Back Mount Rack Tilt Module for Power Steered and Inboards. Teleflex Tilt steering brings comfort and convenience to any boat. Tilt steering allows...

Add to Cart