Seastar Front Mount Cylinder Outboard HC5345

$910.00 $765.00 inc GST

or 4 fortnightly payments of $191.25 with Afterpay More info

Front mount cylinder – standard

SKU: 291003 Category:


Condition:  New

In stock

Due to size - item will be posted regular post.



Seastar Front mount cylinder – standard HC5345-3


This pivoting cylinder from SeaStar offers the incredible steering ease and reliability that puts SeaStar cylinders way ahead of the competition. Throughout the steering arc there simply isn’t anything that feels better to drive.


The Front Mount Cylinder will bolt up to virtually any outboard you’d want to put SeaStar hydraulic steering on. Integral bleeders and few components make installation a snap. Less moving parts and improved seals boost durability and reduce maintenance.


SeaStar took it’s previous cylinder s outstanding design to the next level improving seals bearings fittings and corrosion protection.


  • 20% less effort at hard over than competitive systems
  • Rigid tilt tube mount for no compromise performance
  • Unique pivoting tiller connection allows full engine articulation with independent tilt and trim on twin engines
  • Ultra corrosion resistant construction
  • Painted components are anodised before coating for extra protection
  • Small footprint fits virtually all splashwells
  • Meets ABYC standards NMMA requirements



136.6cc (8.34cu. in) balanced Displacement, 35mm (1.375″) bore, 203mm (8″) stroke, 544mm (21″) overall width.

Applications up to 300HP maximum

For installation dimensions and engine application guide download PDF


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.

Force1985 TO DATE90-150HPHC5345-3
Honda1996 TO DATE75-90HPHC5345-3
1998 TO 2009115-130HPHC5347-3
1998 TO DATE30-50HPHC5345-3See Note 1
2001 TO DATEBF200-250HC5445-3
2003 TO DATEBF135HPHC5345-3
2010 TO DATE115HPHC5345-3
Johnson / Evinrude1977 TO 199065-300HPHC5348-3
1988 TO 1997250-300HP V8HC5342-3
1991 TO DATE40-300HPHC5345-3Inc. ETech
1996 TO DATE75-250HP FICHTHC5345-3
1998 TO DATE40-140HP 4-STROKEHC5358-3See Note 1
2000 TO DATE115HP FICHTHC5358-3See Note 1
2002 TO DATE200-225HP 4-STROKEHC5345-3
2007 TO DATE3.3L/3.4L 200-250HPHC5345-3Inc. H.O. Models
Mercury1984 TO 19942.4/2.5HP EFIHC5345-3See Note 2
1989 TO DATE75-300HPHC5345-3
1998 TO DATE30-60HPHC5345-3See Note 1
2003 TO DATE115-300HP XSHC6345-3See Note 3
2004 TO DATE150-200HP VERADOHC5345-3See Note 4, 5
Nissan1990 TO DATE90-140HPHC5345-3
Suzuki1986 TO DATE100HPHC5345-3
1986 TO 2002115-140HPHC5345-3NOT 1996
1986 TO DATE150-300HP 2 & 4 STROKEHC5345-3
1996 ONLY115-140HPHC5348-3
1998 TO DATE40-140HP 4-STROKEHC5358-3See Note 1
Yamaha1990-200340-90 HP 2-STROKEHC5345-3See Note 1
1986-DATE100-300 HP 2-STROKEHC5345-3
1997-DATE80-250 HP 4-StrokeHC5345-3
2000-DATE150-300 HPDIHC5345-3
2003-DATE25-70 HP 4-StrokeHC5348-3See Note 1
2007-DATE200-300 HP 4.2L V6 4-StrokeHC5345-3
2007-DATEF300-F350 HP 5.3V8HC5345-3See Note 4

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.

 width=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.

SeaStar Solutions® recommends the use of SeaStar PRO (1500 psi) Kevlar steering hoses with SeaStar PRO Helms.


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.

Twin Engine Single Cyl.Twin Engine Dual Cyl.
Force1985 TO DATE90-150HPHC5345-3HO5008AHO5008A
Honda1996 TO DATE75-90HPHC5345-3HO6001HO6002See Note 3
1998 TO 2009115-130HPHC5347-3HO5063HO5064See Note 5
1998 TO DATE30-50HPHC5345-3HO6001HO6002See Note 2
2001 TO DATE150HP 4-STROKEHC5345-3N/AHO6002See Note 7
2001 TO DATE225-250HP 4-STROKEHC5445-3HO6001HO6002
2003 TO DATEBF135HPHC5345-3HO6003HO6002
2010 TO DATE115HPHC5345-3HO6003HO6002See Note 7
Johnson / Evinrude1977 TO 199065-300HPHC5348-3HO6003HO6002
1988 TO 1997250-300HP V8HC5342-3HO5001AHO5030See Note 5
1991 TO DATE40-300HPHC5345-3HO6003HO6002Inc. ETech Engines
1996 TO DATE75-250HP FICHTHC5345-3HO6003HO6002
1998 TO DATE40-140HP 4-STROKEHC5358-3HO6003HO6002See Note 2
2000 TO DATE115HP FICTHC5358-3HO6003HO6002See Note 2
2002 TO DATE200-225HP 4-STROKEHC5345-3HO6003HO6002
2007 TO DATE3.3L/3.4L 200-250HPHC5345-3HO6003HO6002Inc. H.O. Models.
Mercury1984 TO 19942.4/2.5HP EFIHC5345-3HO6001HO6002See Note 4
1989 TO DATE75-300HPHC5345-3HO6001HO6002See Note 3
1996 TO DATE75-200HP 2 & 4-STROKEHC5345-3HO6001HO6002
1998 TO DATE30-60HPHC5345-3HO6001HO6002See Note 2
2002 TO 2003225HP 4-STROKEHC5358-3HO6001HO6002See Note 1
2003 TO DATE150-200XSMUST Use Tournament Cylinders.
2003 TO DATE250-300 HP XSMUST Use Tournament Cylinders.
2004 TO DATE150-200HP VERADOHC5345-3HO6001HO6002
Nissan1990 TO DATE90-140HPHC5345-3HO6001HO6002
Suzuki1986 TO DATE100HPHC5345-3HO6003HO6002
1986 TO 2002115-140HPHC5345-3HO6001HO6002NOT 1996
1986 TO DATE150-300HP 2 & 4 STROKEHC5345-3HO6003HO6002
1996 ONLY115-140HPHC5348-3HO6001HO6002
1998 TO DATE40-140HP 4-STROKEHC5358-3HO6003HO6002See Note 2
2003 TO DATE90HP 4-STROKEHC5358-3HO6003HO6002See Note 2
2013 TO DATEDF150 – DF175 HPHC5345-3HO6001HO6002
Yamaha1986 TO DATE100-250HP 2-STROKEHC5345-3HO6001HO6002
1986 TO DATE40-90HPHC5345-3HO6003HO6002
2000-DATE150-300 HPDIHC5345-3HO6001HO6002
2001 TO 200380-250HP 4-STROKEHC5358-3HO6001HO6002See Note 1
2003 TO DATEF200-F250 3.3LHC5358-3HO6001HO6002
2003 TO DATE25-70HP 4-STROKEHC5348-3HO6003HO6002
2007 TO DATE200-300HP 4.2L V6 4-STROKEHC5345-3HO6001HO6002See Note 2
2007 TO DATEF300-F350 HP 5.3V8MUST use Tournament Cylinders

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.


HO6001, HO6002 and HO6003 are for engine centers up to 36?. For wider engine centers please contact SeaStar Solutions Technical Support.

Additional information

Additional information

Weight5 kg




Price does not include shipping. Product will be shipped via Toll / Australia Post / Courier. Product can also be collected.



Shipping & Delivery

Prices do not include shipping.

$12 Express Shipping for all items up to 3kg - Australia Wide*

$10 Express Shipping for all items up to 500g - Australia Wide

$9 Brisbane - Postcodes 4000-4209, 4270-4299, 4500-4549, 9000-9725 up to 22kg

Boat Hut uses Toll Ipec Priority Service, Australia Post Express Post and Courier's Please. Boat Hut uses Australia Post's Express Courier International Service for New Zealand deliveries.

Free Local Pickup – by prior arrangement. We don’t always have all products at our Acacia Ridge premises but they may be at our warehouse. The warehouse does not usually permit customer collections.

Order Tracking provided on all orders.

All orders will be processed within 2 business days - except backordered items. If we are unable to meet this timeframe we will contact you to provide details and options. If we are unable to ship your order within 3 business days we will offer you a refund in full or the option to wait for the goods to come into stock.

We are happy to ship to any country - and will provide a quote upon request. All overseas orders must be paid for via Paypal before your order is shipped.

Above pricing refers to regular size items that will fit in courier satchels - oversized items will require a freight quote.

Boat Hut reserves the right to refuse to fulfil an order that has the incorrect postage / freight collected at the time of sale. We will work with you to rectify the matter, if we are unable to come to a resolution then we will provide a refund in full.