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Mercury Outboard Parts
Shop OEM and aftermarket Mercury outboard parts for maintenance, repair, troubleshooting, and complete engine rebuild projects. Browse Mercury marine parts by system, including cooling, fuel delivery, electrical and ignition, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Mercury outboard engine parts for a wide range of 2-stroke, FourStroke, EFI, Optimax, Pro XS, SeaPro, and Verado applications. Use your engine horsepower, model, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Mercury Outboard Parts by System
- Complete Powerheads
- Control Cables & Boxes
- Cooling System
- Cowlings & Components
- Electrical System
- Engine Oil
- Engine Rebuild Kits
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service & Oil Change Kits
- Service Manuals
- Steering Systems
- Throttle Components
- Transom & Midsection
- Trim System
- Wizard Performance Parts
Find the Correct Mercury Outboard Part
Mercury outboard parts can vary by horsepower, engine family, model year, and serial number range. If you are unsure which component fits your engine, use the OEM parts lookup to locate the original Mercury part number from an engine diagram.
Once you have the OEM part number, search Pro Marine to find available genuine Mercury and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Mercury Outboard Engine Families
Pro Marine supports many Mercury outboard applications across a wide horsepower range. Always confirm the engine serial number and model information before ordering parts.
- Portable and Midrange: Mercury 2.5HP through 60HP 2-stroke and FourStroke applications
- FourStroke and EFI: common 75HP through 300HP Mercury EFI and FourStroke platforms
- Pro XS: performance-oriented Mercury Pro XS outboards across multiple engine families
- Optimax: direct-injected 2-stroke Mercury Optimax engines, commonly 75HP through 250HP
- Verado: supercharged and naturally aspirated Mercury Verado applications from 135HP through current high-horsepower platforms
- SeaPro: commercial-duty Mercury SeaPro outboards used in professional and high-hour applications
Common Mercury Outboard Repair Areas
- Overheating: inspect the water pump, impeller, thermostat, poppet valve, cooling passages, and related cooling components.
- Hard starting or rough running: inspect fuel pumps, filters, injectors or carburetors, spark plugs, coils, sensors, and intake components.
- No spark or intermittent ignition: check ignition coils, stators, switch boxes, trigger assemblies, sensors, grounds, and wiring.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and internal engine components.
- Lower unit noise or water intrusion: inspect seals, bearings, gears, shafts, bearing carriers, and gear lube condition.
- Trim or steering problems: inspect trim motors, pumps, hydraulic components, steering cylinders, hoses, and related rigging parts.
Why Buy Mercury Outboard Parts from Pro Marine USA?
- OEM Mercury and aftermarket replacement options for many common applications.
- Parts for maintenance, repair, engine rebuilding, lower units, electrical systems, fuel systems, steering, trim, and rigging.
- OEM diagram and part-number lookup tools to help identify the correct part before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large inventory of Mercury service parts and hard-to-find marine engine components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Mercury outboard part?
Use the engine horsepower, model, serial number, and year whenever available. Mercury frequently uses serial-number ranges to identify engine families, so the serial number is often the most reliable way to confirm fitment.
Can I search Mercury parts by OEM part number?
Yes. Enter the Mercury OEM part number into the Pro Marine site search to locate available OEM and aftermarket replacement options. If you do not know the part number, use the OEM parts lookup first.
Do Mercury outboard parts vary by serial number?
Yes. Many Mercury components change by serial-number range even within the same horsepower or model family. Always compare the serial range listed for the part with your engine before ordering.
Do you carry parts for Mercury Optimax and Verado engines?
Yes. Pro Marine carries parts for many Mercury Optimax, Verado, Pro XS, EFI, FourStroke, and SeaPro applications, including maintenance, fuel, electrical, cooling, internal engine, lower unit, steering, and rigging components.
Do you carry both OEM and aftermarket Mercury parts?
Yes. Pro Marine offers genuine Mercury parts along with aftermarket replacement parts for many common Mercury outboard maintenance, repair, and rebuild applications.
What Mercury outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Mercury outboard parts often vary by serial-number range. Confirm your engine serial number and OEM part number whenever possible before ordering.
Pro Series Hydraulic Steering Cylinder
Pro Marine 700HSTEER-CYL Hydraulic Steering Cylinder
The Pro Marine 700HSTEER-CYL Hydraulic Steering Cylinder is a Pro Series hydraulic steering ram designed for high-performance marine outboard steering applications.
This steering cylinder is designed for use with the Pro Marine 700HSTEER hydraulic steering system and helps deliver smooth, controlled steering response for demanding marine applications.
What a Hydraulic Steering Cylinder Does
The hydraulic steering cylinder is the component mounted at the outboard engine that physically turns the engine when hydraulic pressure is applied from the helm pump.
As the steering wheel is turned, hydraulic fluid moves through the steering hoses into the cylinder, extending or retracting the steering ram to control engine direction. Steering cylinder sizing and construction play a major role in steering feel, control, and system durability.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| High-Performance Outboards | Pro Series hydraulic steering cylinder applications |
| Offshore Boats | Controlled hydraulic steering in demanding water conditions |
| Performance Setups | Responsive steering control for higher-speed operation |
| Repower Projects | Replacement hydraulic steering cylinder installations |
| Marine Repair Shops | Professional hydraulic steering service work |
Complete or Service Your Steering System
700HSTEER Steering System
Pair this cylinder with the complete Pro Marine 700HSTEER hydraulic steering system.
View 700HSTEER Steering SystemHydraulic Hoses
Select the proper hydraulic steering hose length for your boat layout, setback, and rigging route.
Shop Pro Marine Hydraulic HosesEnd Cap Kit
Service the steering cylinder using the compatible 700-ENDCAP replacement kit.
View 700-ENDCAPHydraulic Steering Fluid
Use quality hydraulic steering fluid during installation, filling, and bleeding procedures.
View PRO-OIL15 Hydraulic FluidKey Features and Benefits
- Pro Series hydraulic steering cylinder design
- Designed for the Pro Marine 700HSTEER system
- Helps provide smooth and controlled steering response
- Built for demanding marine steering applications
- Good choice for performance and offshore boats
- Compatible service parts available from Pro Marine
- Designed for hydraulic outboard steering systems
- Aftermarket Pro Marine steering component
System Function and Connections
- System Type: Hydraulic outboard steering
- Component Type: Hydraulic steering cylinder
- Part Number: 700HSTEER-CYL
- OEM or Aftermarket: Aftermarket
- Manufacturer: Pro Marine
- Connection Type: Hydraulic steering hose fittings
- Typical Use: High-performance marine steering systems
- Compatible System: Pro Marine 700HSTEER
- Related Components: Helm pumps, hydraulic hoses, fittings, steering fluid, and bleed kits
FAQ
What does the 700HSTEER-CYL steering cylinder do?
The steering cylinder converts hydraulic pressure into steering movement that turns the outboard engine.
What steering system is this cylinder designed for?
This cylinder is designed for the Pro Marine 700HSTEER hydraulic steering system.
Is this an OEM or aftermarket steering cylinder?
This product is listed as an aftermarket Pro Marine steering component.
Can this cylinder be serviced?
Yes. Compatible service components including the 700-ENDCAP kit are available for maintenance and repairs.
Is this cylinder suitable for performance boats?
Yes. The 700HSTEER-CYL is designed for demanding hydraulic steering applications including performance and offshore boats.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
700HSTEER-CYL, hydraulic steering cylinder, Pro Marine steering cylinder, Pro Series steering ram, outboard steering cylinder, marine hydraulic steering cylinder, offshore steering cylinder, performance steering ram, aftermarket steering cylinder, 700HSTEER cylinder
Pro Series Hydraulic Steering System
Pro Marine 700HSTEER Hydraulic Steering System
The Pro Marine 700HSTEER Hydraulic Steering System is a Pro Series aftermarket hydraulic steering kit designed for high-performance marine outboard steering applications.
This Pro Marine hydraulic steering system is listed as a complete kit and is designed to provide smooth, controlled steering response for demanding boat setups.
What a Pro Series Hydraulic Steering System Does
A hydraulic steering system uses a helm pump, hydraulic fluid, steering hoses, fittings, and a steering cylinder to turn the outboard engine. When the steering wheel is turned, hydraulic pressure moves fluid through the system and operates the cylinder at the engine.
The 700HSTEER Pro Series system is built for applications where stronger steering control, smooth handling, and reliable hydraulic response are important.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| High-Performance Outboards | Pro Series hydraulic steering applications |
| Offshore Boats | Controlled hydraulic steering for demanding water conditions |
| Performance Setups | Responsive steering control for higher-speed operation |
| Repower Projects | Upgrade from cable steering or older hydraulic steering systems |
| Marine Repair Shops | Professional hydraulic steering replacement and installation work |
Complete or Service Your Steering System
Hydraulic Hoses
Choose the correct hydraulic steering hose length for your boat, jack plate, setback, and rigging route.
Shop Pro Marine Hydraulic HosesHydraulic Fluid
Use quality hydraulic steering fluid when filling and bleeding your hydraulic steering system.
View PRO-OIL15 Hydraulic FluidPro Series End Cap Kit
Service the 700-HSTEER-CYL steering cylinder with the correct replacement end cap kit.
View 700-ENDCAPHydraulic Steering Fittings
Use compatible Pro Marine hydraulic steering fittings when servicing or completing the steering system.
View HLO14BOS 90° FittingKey Features and Benefits
- Pro Series hydraulic steering system
- Listed as a complete aftermarket steering kit
- Designed for demanding marine outboard steering applications
- Helps provide smooth, controlled hydraulic steering response
- Good choice for performance boats, offshore boats, and repowers
- Helps reduce steering effort compared to cable steering
- Compatible service parts available from Pro Marine
- Oversized shipping item
System Function and Connections
- System Type: Pro Series hydraulic outboard steering
- Component Type: Complete hydraulic steering kit
- Part Number: 700HSTEER
- OEM or Aftermarket: Aftermarket
- Manufacturer: Pro Marine
- Connection Type: Hydraulic steering hose circuit
- Typical Use: High-performance marine outboard steering systems
- Related Components: Hydraulic hoses, steering fluid, fittings, cylinder service parts, and bleed tools
FAQ
What is the Pro Marine 700HSTEER system?
It is a Pro Series aftermarket hydraulic steering system listed as a complete kit for marine steering applications.
What type of steering system is this?
This is a hydraulic outboard steering system designed to use hydraulic pressure to operate the steering cylinder.
Is this an OEM or aftermarket steering system?
This product is listed as an aftermarket Pro Marine hydraulic steering system.
What parts are commonly serviced with this system?
Common related service parts include hydraulic hoses, steering fluid, fittings, bleed tools, and the 700-ENDCAP cylinder end cap kit.
Is this item oversized?
Yes. The product page lists this steering system as an oversized shipping item.
Dealer Discounts & Store Policies
Dealer / Marine Industry Discounts
Are you a marine dealer, technician, boat builder, or industry professional? We offer dealer pricing for qualified marine businesses.
Shipping Policy
- Free shipping on orders over $100 (continental U.S.).
- Orders ship via UPS, USPS, and FedEx.
- Orders received before 5:30 PM EST ship the same business day.
- Typical delivery time is 1–5 business days.
30-Day Return Policy
- Returns accepted within 30 days of delivery.
- Items must be new, unused, and in original packaging.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
700HSTEER, Pro Marine 700HSTEER, Pro Series hydraulic steering, hydraulic steering system, complete hydraulic steering kit, aftermarket steering system, outboard hydraulic steering, performance boat steering, offshore hydraulic steering, Pro Marine steering kit
