SeaStar Hydraulic Steering System Cylinder Selection Guide for Outboard Engines
Below is a comprehensive SeaStar hydraulic steering system cylinder selection guide for outboard engines. We have included single-engine, dual engine+ cylinder selection information. Additionally, we have provided convenient links to hardware kit and tie bar application guides where appropriate.
Johnson/Evinrude ♦ 1991 - Date ♦ 40-300 HP Johnson/Evinrude ♦ 1997 - 2006 ♦ 75-300 HP Ficht Johnson/Evinrude ♦ 2002 - Date ♦ 200 - 225 HP 4-Stroke Johnson/Evinrude ♦ 2007 - Date ♦ 3.3L V6 200 - 250 HP Mercury ♦ 1989 - Date ♦ 75 - 300 HP Mercury ♦ 2003 - Date ♦ 150 - 300 HP XS Mercury ♦ 2004 - Date ♦ 150 - 200 HP Verado Mercury ♦ 2017 - Date ♦ 175 - 200 - 225 HP 3.4L V6 Mercury ♦ 2018 - Date ♦ 250 - 300 HP 4.6L V8 Suzuki ♦ 1986 - 2000 ♦ DT - 100 HP Suzuki ♦ 1986 - 2002 ♦ 115 - 140 HP Suzuki ♦ 1986 - 2013 ♦ 150 - 225 HP 2 & 4-Stroke Suzuki ♦ 2004 - Date ♦ DF200 - 300 HP 3.6 - 4.0L V6 Suzuki ♦ 2017 - Date ♦ DF325 - 350 HP 4.4L V6 Yamaha ♦ 1986 - Date ♦ 100 - 300 HP 2-Stroke Yamaha ♦ 1990 - 2003 ♦ 40 - 90 HP 2-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 1997 - Date ♦ 80 - 250 HP 4-Stroke Yamaha ♦ 2000 - Date ♦ 150 - 300 HPDI Yamaha ♦ 2007 - Date ♦ 200 - 300 HP 4.2L V6 4-Stroke Yamaha ♦ 2007 - Date ♦ F300 - F350 HP 5.3 V8 Yamaha ♦ 2012 - Date ♦ 150 - 200 HP 2.8L 4 Cylinder Yamaha ♦ 2014 - Date ♦ F115B
Mercury ♦ 1998 - Date ♦ 30 - 60 HP ♦ Requires spacer kit #HO5090 Yamaha ♦ 2003 - Date ♦ 25 - 70 HP 4-Stroke ♦ Requires spacer kit #HO5090 Johnson/Evinrude ♦ 1998 - Date ♦ 40 - 140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Johnson/Evinrude ♦ 2000 - 2003 ♦ 115 HP Ficht ♦ Requires spacer kit #HO5090 Suzuki ♦ 1998 - Date ♦ 40 - 140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Suzuki ♦ 2013 - Date ♦ 150 - 200 HP 4-Cylinder Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP
Johnson/Evinrude ♦ 1991 - Date ♦ 40 - 300 HP Johnson/Evinrude ♦ 1996 - Date ♦ 75 - 250 HP Ficht Johnson/Evinrude ♦ 2002 - Date ♦ 200 - 225 HP 4-stroke Johnson/Evinrude ♦ 2007 - Date ♦ 3.3L/3.4L 200 - 250 HP Mercury ♦ 1989 - Date ♦ 75 - 300 HP Mercury ♦ 1996 - Date ♦ 75 - 200 HP 2 & 4-stroke Mercury ♦ 1998 - Date ♦ 30 - 60 HP Mercury ♦ 2004 - Date ♦ 150 - 200 HP Verado Suzuki ♦ 1986 - 2002 ♦ 115 - 140 HP Suzuki ♦ 1986 - 2015 ♦ 150 - 300 HP 2 & 4-stroke Suzuki ♦ 1986 - Date ♦ 100 HP Suzuki ♦ 2013 - Date ♦ DF150 - 300 HP Yamaha ♦ 1986 - Date ♦ 100 - 250 HP 2-stroke Yamaha ♦ 1990 - 2007 ♦ 40 - 90 HP 2-stroke Yamaha ♦ 2000 - Date ♦ 150 - 300 HPDI Yamaha ♦ 2007 - Date ♦ 200 - 300 HP 4.2L V6 4-stroke Yamaha ♦ 2014 - Date ♦ F115B
Johnson/Evinrude ♦ 2005 - Date ♦ E250 DPX Vindicator Yamaha ♦ 2003 - Date ♦ 25 - 70 HP 4-stroke
Johnson/Evinrude ♦ 1998 - Date ♦ 40 - 140 HP 4-stroke Johnson/Evinrude ♦ 2000 - Date ♦ 115 HP Ficht Mercury ♦ 2002 - 2003 ♦ 225 HP 4-stroke Suzuki ♦ 1998 - Date ♦ 40 - 140 HP 4-stroke Suzuki ♦ 2003 - Date ♦ 90 HP 4-stroke Yamaha ♦ 2001 - 2003 ♦ 80 - 250 HP 4-stroke Yamaha ♦ 2003 - Date ♦ F150 - F250 3.3L Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP Mercury ♦ 2016 - Date ♦ 150 HP 3.0L 4-stroke
Mercury ♦ 2003 - Date ♦ 150 - 200 XS Mercury ♦ 2003 - Date ♦ 250 - 300 HP XS Suzuki ♦ 2017 -Date ♦ DF325 - 350 HP 4.4L V6 Yamaha ♦ 2007 - Date ♦ F300 - F350 HP 5.3 V8 
Part #HC6845 is the proper cylinder for single, twin single cylinder, twin dual cylinder, triple dual cylinder, quad engine dual cylinder, and quintuplet+ setups. 
Johnson/Evinrude ♦ 1991 - Date ♦ 40-150 HP Johnson/Evinrude ♦ 1997 - Date ♦ 75-150 HP Ficht Mercury ♦ 1984 - Date ♦ 75-150 HP Suzuki ♦ 1986 - Date ♦ 150 HP Suzuki ♦ 1987 - 2002 ♦ 115-140 HP ♦ Requires spacer kit #HO5090 Suzuki ♦ 1990 - 2000 ♦ 90-100 HP Suzuki ♦ 1998 - Date ♦ 40-70 HP 4-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 1986 - Date ♦ 70-90 HP ♦ 2-stroke Requires spacer kit #HO5090 Yamaha ♦ 1997 - Date ♦ 80-150 HP 4-stroke Yamaha ♦ 1998 - Date ♦ 40-50 HP Yamaha ♦ 1998 - Date ♦ 60 HP
Mercury ♦ 1998 - Date ♦ 40-60 HP ♦ Requires spacer kit #HO5090 Yamaha ♦ 2000 - Date ♦ 25-70 HP 4-stroke ♦ Requires spacer kit #HO5090
Johnson/Evinrude ♦ 1997 - Date ♦ 115 HP Ficht Johnson/Evinrude ♦ 1998 - Date ♦ 40-140 HP 4-stroke ♦ Requires spacer kit #HO5090 Suzuki ♦ 2001 - Date ♦ 90-140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP Click for more SeaStar hydraulic steering system resources Make sure you always have the right Yamaha outboard controls.
SeaStar Hydraulic Steering System Single Engine Application Guide
HC5345-3
Johnson/Evinrude ♦ 1991 - Date ♦ 40-300 HP Johnson/Evinrude ♦ 1997 - 2006 ♦ 75-300 HP Ficht Johnson/Evinrude ♦ 2002 - Date ♦ 200 - 225 HP 4-Stroke Johnson/Evinrude ♦ 2007 - Date ♦ 3.3L V6 200 - 250 HP Mercury ♦ 1989 - Date ♦ 75 - 300 HP Mercury ♦ 2003 - Date ♦ 150 - 300 HP XS Mercury ♦ 2004 - Date ♦ 150 - 200 HP Verado Mercury ♦ 2017 - Date ♦ 175 - 200 - 225 HP 3.4L V6 Mercury ♦ 2018 - Date ♦ 250 - 300 HP 4.6L V8 Suzuki ♦ 1986 - 2000 ♦ DT - 100 HP Suzuki ♦ 1986 - 2002 ♦ 115 - 140 HP Suzuki ♦ 1986 - 2013 ♦ 150 - 225 HP 2 & 4-Stroke Suzuki ♦ 2004 - Date ♦ DF200 - 300 HP 3.6 - 4.0L V6 Suzuki ♦ 2017 - Date ♦ DF325 - 350 HP 4.4L V6 Yamaha ♦ 1986 - Date ♦ 100 - 300 HP 2-Stroke Yamaha ♦ 1990 - 2003 ♦ 40 - 90 HP 2-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 1997 - Date ♦ 80 - 250 HP 4-Stroke Yamaha ♦ 2000 - Date ♦ 150 - 300 HPDI Yamaha ♦ 2007 - Date ♦ 200 - 300 HP 4.2L V6 4-Stroke Yamaha ♦ 2007 - Date ♦ F300 - F350 HP 5.3 V8 Yamaha ♦ 2012 - Date ♦ 150 - 200 HP 2.8L 4 Cylinder Yamaha ♦ 2014 - Date ♦ F115B
HC5348-3
Mercury ♦ 1998 - Date ♦ 30 - 60 HP ♦ Requires spacer kit #HO5090 Yamaha ♦ 2003 - Date ♦ 25 - 70 HP 4-Stroke ♦ Requires spacer kit #HO5090 Johnson/Evinrude ♦ 1998 - Date ♦ 40 - 140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Johnson/Evinrude ♦ 2000 - 2003 ♦ 115 HP Ficht ♦ Requires spacer kit #HO5090 Suzuki ♦ 1998 - Date ♦ 40 - 140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Suzuki ♦ 2013 - Date ♦ 150 - 200 HP 4-Cylinder Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP
Cylinder Selection
SeaStar Hydraulic Steering System Twin Engine Application Guide
HC5345-3
Johnson/Evinrude ♦ 1991 - Date ♦ 40 - 300 HP Johnson/Evinrude ♦ 1996 - Date ♦ 75 - 250 HP Ficht Johnson/Evinrude ♦ 2002 - Date ♦ 200 - 225 HP 4-stroke Johnson/Evinrude ♦ 2007 - Date ♦ 3.3L/3.4L 200 - 250 HP Mercury ♦ 1989 - Date ♦ 75 - 300 HP Mercury ♦ 1996 - Date ♦ 75 - 200 HP 2 & 4-stroke Mercury ♦ 1998 - Date ♦ 30 - 60 HP Mercury ♦ 2004 - Date ♦ 150 - 200 HP Verado Suzuki ♦ 1986 - 2002 ♦ 115 - 140 HP Suzuki ♦ 1986 - 2015 ♦ 150 - 300 HP 2 & 4-stroke Suzuki ♦ 1986 - Date ♦ 100 HP Suzuki ♦ 2013 - Date ♦ DF150 - 300 HP Yamaha ♦ 1986 - Date ♦ 100 - 250 HP 2-stroke Yamaha ♦ 1990 - 2007 ♦ 40 - 90 HP 2-stroke Yamaha ♦ 2000 - Date ♦ 150 - 300 HPDI Yamaha ♦ 2007 - Date ♦ 200 - 300 HP 4.2L V6 4-stroke Yamaha ♦ 2014 - Date ♦ F115B
HC5348-3
Johnson/Evinrude ♦ 2005 - Date ♦ E250 DPX Vindicator Yamaha ♦ 2003 - Date ♦ 25 - 70 HP 4-stroke
HC5358-3
Johnson/Evinrude ♦ 1998 - Date ♦ 40 - 140 HP 4-stroke Johnson/Evinrude ♦ 2000 - Date ♦ 115 HP Ficht Mercury ♦ 2002 - 2003 ♦ 225 HP 4-stroke Suzuki ♦ 1998 - Date ♦ 40 - 140 HP 4-stroke Suzuki ♦ 2003 - Date ♦ 90 HP 4-stroke Yamaha ♦ 2001 - 2003 ♦ 80 - 250 HP 4-stroke Yamaha ♦ 2003 - Date ♦ F150 - F250 3.3L Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP Mercury ♦ 2016 - Date ♦ 150 HP 3.0L 4-stroke
HC6845
Cylinder Selection
Tournament Series Cylinder Selection
HC6845
Part #HC6845 is the proper cylinder for single, twin single cylinder, twin dual cylinder, triple dual cylinder, quad engine dual cylinder, and quintuplet+ setups.
Cylinder Selection
BayStar Outboard Steering Application Guide
HC4645H
Johnson/Evinrude ♦ 1991 - Date ♦ 40-150 HP Johnson/Evinrude ♦ 1997 - Date ♦ 75-150 HP Ficht Mercury ♦ 1984 - Date ♦ 75-150 HP Suzuki ♦ 1986 - Date ♦ 150 HP Suzuki ♦ 1987 - 2002 ♦ 115-140 HP ♦ Requires spacer kit #HO5090 Suzuki ♦ 1990 - 2000 ♦ 90-100 HP Suzuki ♦ 1998 - Date ♦ 40-70 HP 4-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 1986 - Date ♦ 70-90 HP ♦ 2-stroke Requires spacer kit #HO5090 Yamaha ♦ 1997 - Date ♦ 80-150 HP 4-stroke Yamaha ♦ 1998 - Date ♦ 40-50 HP Yamaha ♦ 1998 - Date ♦ 60 HP
HC4648H
Mercury ♦ 1998 - Date ♦ 40-60 HP ♦ Requires spacer kit #HO5090 Yamaha ♦ 2000 - Date ♦ 25-70 HP 4-stroke ♦ Requires spacer kit #HO5090
HC4658H
Johnson/Evinrude ♦ 1997 - Date ♦ 115 HP Ficht Johnson/Evinrude ♦ 1998 - Date ♦ 40-140 HP 4-stroke ♦ Requires spacer kit #HO5090 Suzuki ♦ 2001 - Date ♦ 90-140 HP 4-Stroke ♦ Requires spacer kit #HO5090 Yamaha ♦ 2011 - Date ♦ F115A including SHO 90 & 115 HP Click for more SeaStar hydraulic steering system resources Make sure you always have the right Yamaha outboard controls.
39 comments
Hey I have a 2002 225 mercury efi and cant find a steering that will mount, could you point me in the right direction?
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PartsVu replied:
Hi Johnny,
Thanks for reaching out! To help you find the correct steering system for your 2002 Mercury 225 EFI, please send your engine’s serial number to partsvu@partsvu.com. One of our agents will be happy to look into the right fit for your setup. Let us know if there’s anything else we can assist with!
Best regards, Markine
I have a 1996 Johnson fast strike 115, which sea star would you recommend?
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PartsVu replied:
Hi Joshua,
For your 1996 Johnson Fast Strike 115HP, the recommended SeaStar hydraulic steering cylinder would typically be the SeaStar HC5345-3 Front Mount Cylinder, paired with the SeaStar HK6400A-3 Hydraulic Steering Kit for a complete system. However, it’s always best to confirm compatibility with SeaStar’s official fitment guide or consult with a marine technician to ensure the correct setup for your boat.
Let us know if you have any other questions—we’re happy to help!
Best regards,
Markine
Hello I have a 1997 Johnson Evinrude 115 hp motor and has hydraulic steering on it the cylinder number is hc5342, with that being said I’m upgrading to a 2008 mercury 115 optimax can you tell me is there a kit I can buy to make that cylinder work on the mercury so I don’t have to buy whole new cylinder?
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PartsVu replied:
Hello Nathan,
It’s great to hear that you’re upgrading your boat motor! As for your question, when switching from a 1997 Johnson Evinrude 115 hp to a 2008 Mercury 115 Optimax, compatibility between the SeaStar hydraulic steering system and the new motor’s steering cylinder is crucial. The HC5342 steering cylinder is designed specifically for certain outboard motors, but it may not directly match the mounting and steering geometry of the Mercury 115 Optimax.
Unfortunately, there isn’t typically a one-size-fits-all “kit” to make an older steering cylinder like the HC5342 work seamlessly with a newer motor. However, you have a couple of options:
1. Adapting the Cylinder to the New Motor: Some manufacturers, including SeaStar, offer mounting kits and adapters that might allow you to mount your current HC5342 cylinder on the new Mercury motor. These kits would include the necessary parts to adapt the cylinder’s mounting points and might involve changing or modifying hoses and fittings to ensure everything matches. 2. Upgrading the Steering Cylinder: If the Mercury 115 Optimax requires a different type of cylinder, it might be more cost-effective in the long run to replace the steering cylinder with a model that is specifically designed for the Mercury motor. SeaStar and other brands often offer compatible cylinders for a wide range of outboard engines.I recommend contacting SeaStar or your local dealer to confirm if any adapter kits are available for your existing cylinder. They might also be able to suggest a more compatible cylinder if upgrading is the best route.
Best Regards Markine
Hello Ralph,
Thank you for contacting us.
You’ll want to get the cylinder Suzuki advised on.
https://www.partsvu.com/1-hc53583-cylinder-o-b-fm-yam-hpdi-4st.html
I have a 2021 Suzuki df250 according to Sea Star tech line my cylinder should be a hc5358-3 your listing shows a hc4345-3 does that matter?