Features and Benefits
• Available in 1.7, 2.0 and 2.4 cubic inch displacements
• Convenient front of dash fill
• Small 3.0″ hole cutout on dash
• Can be retrofitted into old SeaStar 4.5″ hole cutout (part number HA5418)
Dimensions and Accessories
Notice: Maximum steering wheel diameter is 28″ (711mm).
Backplate Kit (Part number HA5418)
a) Used to retrofit a new SeaStar standard helm in the old 4.5″ (115mm) diameter hole, or
b) Reduce the helm protrusion from the dash by the thickness of the dash, or
c) Retrofit new SeaStar standard helm into hold cutouts for mechanical and hydraulic steering as per chart
| STEERING MANUFACTURER | HELM MODEL TYPE | SYSTEM | BACKPLATE KIT REQ . |
| TELEFLEX | SAFE-T BIG-T ROTARY RACK & PINION SYTEN | MECHANICAL MECHANICAL MECHANICAL MECHANICAL HYDRAULIC | YES YES NO NO YES |
| MORSE | ROTARY RACK & PINION | MECHANICAL MECHANICAL | NO NO |
Round Bezel Kit (Part number HA5478)
Reduces the distance the helm protrudes from the front of the dash to 3.75″ (93mm). This information is also available as a downloadable PDF Supplement 767629.
20° Wedge Kit c/w Drain Kit (Part number HA5419 & HA5408)
This kit is designed to mount the helm at a 20° angle to the mounting surface. 4 possible mounting configurations are available.
For this configuration use Part number HA5408
ORDER GUIDE
| HELM DESCRIPTION | MOUNT TYPE | PART NO | DISPLACEMENT | RELIEF VALVE SETTINGS | ||
| CU.IN/REV | (CC/REV) | PSI | (BAR) | |||
| *SEASTAR 1.4 | FRONT | HH5269 | 1.4 | 23.0 | 1000 | 70 |
| *SEASTAR 1.7 | FRONT | HH5271 | 1.7 | 27.8 | 1000 | 70 |
| *SEASTAR 2.0 | FRONT | HH5273 | 2.0 | 32.8 | 1000 | 70 |
| *SEASTAR 2.4 | FRONT | HH5272 | 2.4 | 39.3 | 1000 | 70 |
| *SEASTAR PRO | FRONT | HH5779 | 1.7 | 27.8 | 1500 | 103 |
| *SEASTAR PRO | FRONT | HH5770 | 2.0 | 32.8 | 1500 | 103 |
| *SEASTAR PRO | FRONT | HH5772 | 2.4 | 39.3 | 1500 | 103 |
*OPTIONAL EQUIPMENT
Back Plate – HA5418
20 Degree Wedge – HA5419
Round Bezel Kit – HA5478
SeaStar Outboard (Front Mount)
Seastar HC5345-3
The NEW SeaStar Outboard Steering Cylinder
SeaStar Solutions, the leader in hydraulic and mechanical marine steering, has introduced a
new outboard hydraulic cylinder featuring upgrades to the barrel, sealing system and fittings.
These upgrades are designed to keep pace with the introduction of heavier higher horsepower
engines found on today’s new boats.
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FEATURES
• Independent engine tilt for twin/triple engine installations
• Easy steering
• Suitable for use with all SeaStar Helms & SeaStar Power Assist
• Varying lock to lock turn ratio, dependant on helm selection
• State of the art proprietary sealing system offers excellent resistance to repeated compression
set and is designed to better withstand the harsh environment
• Stainless steel adjustable O-Ring (ORB) fitting for easier installation
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MULTIPLE ENGINE CONFIGURATION
For Single, Twin and Triple Engine Applications
| Twin Engine / Single Cylinder (Uses HO6001 tie bar) | Twin Engine / Dual Cylinder (Uses HO6002 tie bar) |
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HOW TO SELECT A FRONT MOUNT OUTBOARD STEERING SYSTEM
1) From the installation recommendations on page 3-3 select the system configuration based on:
a) the number of engines,
b) the total power of engine(s) to be installed andc) driving use.
2)From the application guides, confirm that the Front Mount cylinder will fit your specific make, model and year of engine. Select the adapter kit for single engines or the tie bar kit for dual engines.
3)From Section 6 select the appropriate helms and accessory hardware for each steering station.
4)From Section 9 select the fitting and hose kits required for the installation.
5)Confirm that there is sufficient space available in the splashwell and dash areas for the steering components.
6)Determine if Power Assist is desired, see SeaStar Power Assist Steering to even further enhance your hydraulic steering system.
CAUTION: Not recommended for use in installations where;
a) Chopper, cleaver or surface piercing propellers are used,
b) The engine is highly elevated on the transom,
c)Engine trim tabs have been removed,
d)The boat speed exceeds 75 mph (120 km/h), or
e)The power exceeds the maximum Coast Guard or M.O.T. recommendations for the boat.
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OUTBOARD INSTALLATION RECOMENDATIONS
Outboard recommendations made in this section are based on our experience with typical installations, applications and usage. Ensure you select the system which provides the best comfort versus performance. It is the boat manufacturer and the installer’s responsibility to ensure the components selected are sufficiently validated on the boat for safe and acceptable operation. DO NOT use SeaStar Solutions Steering in applications they are not intended for.
| ENGINE | SEASTAR FRONT MOUNT (Normal Use) | SEASTAR FRONT MOUNT (Aggressive Use – See Note 1) | HYNAUTIC K-6 (Normal Use Only) |
| Single Engine | SINGLE CYLINDER 350HP Max 75 MPH Max HC53xx Cylinder (See Note 2) | SINGLE CYLINDER 350HP Max HC63xx Cylinder (See Notes 2 & 3) or HC6845S | SINGLE CYLINDER 300HP Max 55 MPH Max |
| Dual Engine Non-Counter Rotating | SINGLE CYLINDER 450HP Max, 55 MPH Max HC53xx Cylinder, HO60xx Tiebar | SINGLE CYLINDER Tournament Cylinders | SINGLE CYLINDER 400HP Max 55 MPH Max |
| DUAL CYLINDER 600HP Max, 55 MPH Max HC53xx Cylinders, HO60xx Tiebar | DUAL CYLINDER Tournament Cylinders | DUAL CYLINDER 500HP Max 55 MPH Max | |
| Dual Engine Counter Rotating | SINGLE CYLINDER 600HP Max, 55 MPH Max HC53xx Cylinder, HO60xx Tiebar | SINGLE CYLINDER Tournament Cylinders | SINGLE CYLINDER 500HP Max 55 MPH Max |
| DUAL CYLINDER 600HP Max, 55 MPH Max HC53xx Cylinders, HO60xx Tiebar | DUAL CYLINDER Tournament Cylinders | DUAL CYLINDER 500HP Max 55 MPH Max | |
| Triple Engine One With Counter Rotating | DUAL CYLINDER 900HP Max, 55 MPH Max HC53xx Cylinders, HO60xx Tiebar | DUAL CYLINDER Tournament Cylinders | NOT RECOMMENDED |
| TRIPLE CYLINDER 900HP Max, 55 MPH Max HC53xx Cylinders, HO60xx Tie Bar | Consult SeaStar Solutions® Canada Technical Service | Consult SeaStar Solutions® Canada Technical Service |
NOTES
1. SeaStar Solutions® has specific steering equipment for boats that are driven aggressively, used in severe conditions or with more than 300 HP per engine.
2. ALL ENGINES over 300 HP and all boats that are driven aggressively must use a high strength tiller bolt, kit part #HA5822. All front mount cylinders built after June 15, 2007 will have this high strength bolt included in the box. High strength tiller bolts can be identified by the marking ‘TFX – ARP’ on the head of the bolt (refer to NOTICE below).
3. HC63xx PRO Cylinders are designed for all those critical high speed, single outboard engine boats, such as Bass, Flats combo Race/Ski and other performance orientated boats capable of speeds in excess of 65 mph. For optimal performance, the use of SeaStar PRO Kevlar Steering Hoses is recommended.
4. HC6845 Tournament cylinders are designed for use with high powered fishing/sport boats. If your application calls for dual or triple outboard engines, is capable of speeds exceeding 55 mp/h and runs in open water, Tournament Cylinders should be used.
5. Not recommended for use in installations where:
a) chopper, cleaver or surface piercing propellers are used,
b) the engine is highly elevated on the transom,
c) engine trim tabs have been removed,
d) the boat speed exceeds 75 mph (120 km/h), or
e) the power exceeds maximum Coast Guard or M.O.T. recommendations for the boat.
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ORDER GUIDE (Normal Use)
| ENGINE/CYLINDER CONFIGURATION | DESCRIPTION | QTY. REQ. | MODEL | PART # |
| SINGLE ENGINE (Single Cylinder) Applications up to 350HP Max. Number of Turns = 5  NOTICE: HC5345-3 is not compatible with all engines. Refer to Application Guides on page 3-5 to page 3-10 to ensure you have the correct cylinder for your application | Cylinder | 1 | Front Mount | HC5345-3** |
| Helm | 1 | SeaStar* | HH5271-3 | |
| Hose Kit | 1 | Outboard Hose | HO51XX*** | |
| Oil | 3 | SeaStar Oil | HA5430 | |
| For Extra Steering Station Add: | ||||
| Helm | 1 | SeaStar* | HH5271-3 | |
| Fitting Kit | 1 | Add a Station | HF6007 | |
| Hose Kit | 1 | Outboard Hose | HO51XX | |
| Oil | 1 | SeaStar Oil | HA5430 | |
| DUAL ENGINE (Single Cylinder) Non-Counter Rotating Applications up to 450HP Max. Counter Rotating Applications up to 600HP Max. Number of Turns = 5  | Cylinder | 1 | Front Mount | HC5345-3** |
| Tie-Bar Kit | 1 | HO60XX** | ||
| Helm | 1 | SeaStar* | HH5271-3 | |
| Hose Kit | 1 | Outboard Hose | HO51XX** | |
| Oil | 3 | SeaStar Oil | HA5430 | |
| For Extra Steering Station Add: | ||||
| Helm | 1 | SeaStar* | HH5271-3 | |
| Fitting Kit | 1 | Add a Station | HF6007 | |
| Hose Kit | 1 | Outboard Hose | HO51XX** | |
| Oil | 1 | SeaStar Oil | HA5430 | |
| DUAL ENGINE (Dual Cylinders) Non-Counter Rotating Applications up to 600HP Max. All Counter Rotating Applications up to 600HP Max Number of Turns = 6.5  | Cylinder | 2 | Front Mount | HC5345-3** |
| Tie-Bar Kit | 1 | HO60XX** | ||
| Helm | 1 | SeaStar* | HH5272-3 | |
| Hose Kit | 3 | Outboard Hose | HO51XX** | |
| Fitting Kit | 1 | Tee Fittings | HF5530 | |
| Oil | 3 | SeaStar Oil | HA5430 | |
| For Extra Steering Station Add: | ||||
| Helm | 1 | SeaStar* | HH5272-3 | |
| Fitting Kit | 1 | Add a Station | HF6007 | |
| Hose Kit | 1 | Outboard Hose | HO51XX** | |
| Oil | 1 | SeaStar Oil | HA5430 | |
| OPTIONAL EQUIPMENT | Back Plate Kit (for Standard Helms) | HA5478 | ||
| 20 Degree Wedge (for Standard Helms) | HA5419 | |||
| Autopilot Fitting Kit (for all -3 Helms) | HF5501 | |||
| Power Assist steering | PA1200-2 |
NOTES:
* All helm designs can be used
** Refer to application guides
*** Refer to measuring hose distance
NOTICE:
Front Mount Cylinder part# HC5345-3 is included in the SeaStar Outboard Steering Kits HK6400A-3/HK63xxA-3. If your engine requires the use of a cylinder other than the HC5345-3 (see application guides on pages 3-5 through 3-6) you will need to purchase the individual components (helm, cylinder, hoses, etc.) separately.
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APPLICATION GUIDE – Single Engine (Normal Use)
Prior to selecting a cylinder from this application guide, please refer to our order guide to ensure that you are selecting the correct cylinder for your engine/boat.
| ENGINE MANUF. | YEAR | MODEL | CYLINDER | NOTES |
| Force | 1985 TO DATE | 90-150HP | HC5345-3 | |
| Honda | 1996 TO DATE | 75-90HP | HC5345-3 | |
| 1998 TO 2009 | 115-130HP | HC5347-3 | ||
| 1998 TO DATE | 30-50HP | HC5345-3 | See Note 1 | |
| 2001 TO DATE | BF200-250 | HC5445-3 | ||
| 2003 TO DATE | BF135HP | HC5345-3 | ||
| 2010 TO DATE | 115HP | HC5345-3 | ||
| Johnson / Evinrude | 1977 TO 1990 | 65-300HP | HC5348-3 | |
| 1988 TO 1997 | 250-300HP V8 | HC5342-3 | ||
| 1991 TO DATE | 40-300HP | HC5345-3 | Inc. ETech | |
| 1996 TO DATE | 75-250HP FICHT | HC5345-3 | ||
| 1998 TO DATE | 40-140HP 4-STROKE | HC5358-3 | See Note 1 | |
| 2000 TO DATE | 115HP FICHT | HC5358-3 | See Note 1 | |
| 2002 TO DATE | 200-225HP 4-STROKE | HC5345-3 | ||
| 2007 TO DATE | 3.3L/3.4L 200-250HP | HC5345-3 | Inc. H.O. Models | |
| Mercury | 1984 TO 1994 | 2.4/2.5HP EFI | HC5345-3 | See Note 2 |
| 1989 TO DATE | 75-300HP | HC5345-3 | ||
| 1998 TO DATE | 30-60HP | HC5345-3 | See Note 1 | |
| 2003 TO DATE | 115-300HP XS | HC6345-3 | See Note 3 | |
| 2004 TO DATE | 150-200HP VERADO | HC5345-3 | See Note 4, 5 | |
| Nissan | 1990 TO DATE | 90-140HP | HC5345-3 | |
| Suzuki | 1986 TO DATE | 100HP | HC5345-3 | |
| 1986 TO 2002 | 115-140HP | HC5345-3 | NOT 1996 | |
| 1986 TO DATE | 150-300HP 2 & 4 STROKE | HC5345-3 | ||
| 1996 ONLY | 115-140HP | HC5348-3 | ||
| 1998 TO DATE | 40-140HP 4-STROKE | HC5358-3 | See Note 1 | |
| Yamaha | 1990-2003 | 40-90 HP 2-STROKE | HC5345-3 | See Note 1 |
| 1986-DATE | 100-300 HP 2-STROKE | HC5345-3 | ||
| 1997-DATE | 80-250 HP 4-Stroke | HC5345-3 | ||
| 2000-DATE | 150-300 HPDI | HC5345-3 | ||
| 2003-DATE | 25-70 HP 4-Stroke | HC5348-3 | See Note 1 | |
| 2007-DATE | 200-300 HP 4.2L V6 4-Stroke | HC5345-3 | ||
| 2007-DATE | F300-F350 HP 5.3V8 | HC5345-3 | See Note 4 | |
| 2011-2013 | F115A | HC5358-3 | ||
| 2014-DATE | F115B | HC5345-3 |
NOTES:
1. Requires spacer kit HO5090.
2. May require extensive cowling modifications.
3. MUST use High Strength Tiller bolt, part # HA5822. Refer to the Notice on this page identifying the high strength bolt.
4. Optional cylinder part # HC5358. Slight interference may occur when using the HC5358, with the engine in the full tilt position.
5. Cylinder part # HC5358 may also be used in these single engine applications, please see note #4 for interference concerns.
NOTICES:
High Strength Tiller bolt, part# HA5822. ALL cylinders shipped after June 1st, 2007 will have this bolt included in the cylinder package.
Front Mount Cylinder part# HC5345-3 is included in the SeaStar Outboard Steering Kits HK6400A-3/HK63xxA-3. If your engine requires the use of a cylinder other than the HC5345-3 (see application guides) you will need to purchase the individual components (helm, cylinder, hoses, etc.) separately.
CAUTION:
SeaStar Solutions® recommends the use of SeaStar PRO (1500 psi) Kevlar steering hoses with SeaStar PRO Helms.
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APPLICATION GUIDE – Twin Engine (Normal Use)
Prior to selecting a cylinder from this application guide, please refer to our order guide to ensure that you are selecting the correct cylinder for your engine/boat.
| ENGINE MANUF. | YEAR | MODEL | CYLINDER | TIE BAR KITS | NOTES | |
| Twin Engine Single Cyl. | Twin Engine Dual Cyl. | |||||
| Force | 1985 TO DATE | 90-150HP | HC5345-3 | HO5008A | HO5008A | |
| Honda | 1996 TO DATE | 75-90HP | HC5345-3 | HO6001 | HO6002 | See Note 3 |
| 1998 TO 2009 | 115-130HP | HC5347-3 | HO5063 | HO5064 | See Note 5 | |
| 1998 TO DATE | 30-50HP | HC5345-3 | HO6001 | HO6002 | See Note 2 | |
| 2001 TO DATE | 150HP 4-STROKE | HC5345-3 | N/A | HO6002 | See Note 7 | |
| 2001 TO DATE | 225-250HP 4-STROKE | HC5445-3 | HO6001 | HO6002 | ||
| 2003 TO DATE | BF135HP | HC5345-3 | HO6003 | HO6002 | ||
| 2010 TO DATE | 115HP | HC5345-3 | HO6003 | HO6002 | See Note 7 | |
| Johnson / Evinrude | 1977 TO 1990 | 65-300HP | HC5348-3 | HO6003 | HO6002 | |
| 1988 TO 1997 | 250-300HP V8 | HC5342-3 | HO5001A | HO5030 | See Note 5 | |
| 1991 TO DATE | 40-300HP | HC5345-3 | HO6003 | HO6002 | Inc. ETech Engines | |
| 1996 TO DATE | 75-250HP FICHT | HC5345-3 | HO6003 | HO6002 | ||
| 1998 TO DATE | 40-140HP 4-STROKE | HC5358-3 | HO6003 | HO6002 | See Note 2 | |
| 2000 TO DATE | 115HP FICT | HC5358-3 | HO6003 | HO6002 | See Note 2 | |
| 2002 TO DATE | 200-225HP 4-STROKE | HC5345-3 | HO6003 | HO6002 | ||
| 2005 TO DATE | E250 DPX VINDICATOR | HC5348-3 | HO6003 | HO6002 | ||
| 2007 TO DATE | 3.3L/3.4L 200-250HP | HC5345-3 | HO6003 | HO6002 | Inc. H.O. Models. | |
| Mercury | 1984 TO 1994 | 2.4/2.5HP EFI | HC5345-3 | HO6001 | HO6002 | See Note 4 |
| 1989 TO DATE | 75-300HP | HC5345-3 | HO6001 | HO6002 | See Note 3 | |
| 1996 TO DATE | 75-200HP 2 & 4-STROKE | HC5345-3 | HO6001 | HO6002 | ||
| 1998 TO DATE | 30-60HP | HC5345-3 | HO6001 | HO6002 | See Note 2 | |
| 2002 TO 2003 | 225HP 4-STROKE | HC5358-3 | HO6001 | HO6002 | See Note 1 | |
| 2003 TO DATE | 150-200XS | MUST Use Tournament Cylinders. | ||||
| 2003 TO DATE | 250-300 HP XS | MUST Use Tournament Cylinders. | ||||
| 2004 TO DATE | 150-200HP VERADO | HC5345-3 | HO6001 | HO6002 | ||
| Nissan | 1990 TO DATE | 90-140HP | HC5345-3 | HO6001 | HO6002 | |
| Suzuki | 1986 TO DATE | 100HP | HC5345-3 | HO6003 | HO6002 | |
| 1986 TO 2002 | 115-140HP | HC5345-3 | HO6001 | HO6002 | NOT 1996 | |
| 1986 TO DATE | 150-300HP 2 & 4 STROKE | HC5345-3 | HO6003 | HO6002 | ||
| 1996 ONLY | 115-140HP | HC5348-3 | HO6001 | HO6002 | ||
| 1998 TO DATE | 40-140HP 4-STROKE | HC5358-3 | HO6003 | HO6002 | See Note 2 | |
| 2003 TO DATE | 90HP 4-STROKE | HC5358-3 | HO6003 | HO6002 | See Note 2 | |
| 2013 TO DATE | DF150 – DF175 HP | HC5345-3 | HO6001 | HO6002 | ||
| Yamaha | 1986 TO DATE | 100-250HP 2-STROKE | HC5345-3 | HO6001 | HO6002 | |
| 1986 TO DATE | 40-90HP | HC5345-3 | HO6003 | HO6002 | ||
| 2000-DATE | 150-300 HPDI | HC5345-3 | HO6001 | HO6002 | ||
| 2001 TO 2003 | 80-250HP 4-STROKE | HC5358-3 | HO6001 | HO6002 | See Note 1 | |
| 2003 TO DATE | F200-F250 3.3L | HC5358-3 | HO6001 | HO6002 | ||
| 2003 TO DATE | 25-70HP 4-STROKE | HC5348-3 | HO6003 | HO6002 | ||
| 2007 TO DATE | 200-300HP 4.2L V6 4-STROKE | HC5345-3 | HO6001 | HO6002 | See Note 2 | |
| 2007 TO DATE | F300-F350 HP 5.3V8 | MUST use Tournament Cylinders | ||||
| 2011-2013 | 115A | HC5358-3 | HO6003 | HO6002 | ||
| 2014-DATE | 115B | HC5345-3 | HO6003 | HO6002 |
NOTES:
1. HC5345 is optional for SINGLE ENGINE ONLY applications. DO NOT use HC5345 for Twin engine applications as operational interference may occur.
2. Requires kit HO5090.
3. Minimum engine center = 27″.
4. May require extensive cowling modifications.
5. HO5030 and HO5064 comes without tie-bar.
6. One cylinder per engine. Must use Mercury supplied tiller bolt for installation.
7. Interference will occur when using a single HC5345 cylinder and HO6003 tiebar when installed in the aft hole on the steering arm.
Options include:
a) install tiebar into most forward hole (this will limit steering articulation),
b) purchase K-6 Cylinder, and tiebar kit part # HO5009. There will no be no interference when using twin HC5345 cylinders.
NOTICE:
HO6001, HO6002 and HO6003 are for engine centers up to 36″. For wider engine centers please contact SeaStar Solutions Technical Support.
