S2K Commerce - Products Dropdown
Actions
S2K Commerce - Order Entry
Actions
Mercury Outboard Parts
Shop Mercury outboard motor parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, and routine service items. Browse OEM and replacement Mercury marine parts to support maintenance, repair, and rebuild projects.
Shop 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
Common Mercury Outboard Model References
This category supports many popular Mercury outboards across a wide horsepower range. Always confirm your model and serial number for best fitment.
- Portable & Midrange: 2.5HP–60HP (2-stroke & FourStroke)
- Performance: Pro XS and EFI platforms (75HP–300HP)
- Direct Injection: Optimax models (75HP–250HP)
- Premium Offshore: Verado models (135HP–400HP)
- Commercial: SeaPro models (commonly 75HP–300HP)
Always confirm your exact horsepower, model year, and serial number to ensure proper part compatibility before ordering.
30cc Tilt Hydraulic Steering Helm Pump
Pro Marine 350-THELM-030 Tilt Hydraulic Helm Pump
The Pro Marine 350-THELM-030 Tilt Hydraulic Helm Pump is a 30cc tilt hydraulic steering helm designed for smooth, responsive steering control while allowing adjustable steering wheel positioning for improved driver comfort.
This Pro Marine tilt helm is designed for the 350-HSTEER system and is compatible with many standard hydraulic steering systems, including Pro Marine, SeaStar®, Uflex®, and other similar front-mount hydraulic steering setups.
What a 30cc Tilt Helm Pump Does
The helm pump creates the hydraulic pressure that moves fluid through the steering hoses and into the steering cylinder. When you turn the wheel, the helm controls how much fluid is moved through the system, which directly affects steering feel and wheel turns lock-to-lock.
A 30cc tilt helm moves more fluid per steering wheel turn than smaller helms while also allowing the steering wheel angle to be adjusted for improved comfort and driving position.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| Single Outboards up to 350HP | Hydraulic steering helm applications requiring adjustable tilt positioning |
| Center Console Boats | Improved comfort for seated and standing driving positions |
| Bay Boats | Responsive steering with adjustable helm angle |
| Offshore Boats | Comfortable steering position for long-distance operation |
| Performance Setups | Useful where responsive steering and driver comfort are important |
Complete or Service Your Steering System
Complete Steering Kit
Need a complete hydraulic steering package? The 350-HSTEER kit includes the steering cylinder, helm pump, hydraulic fluid, and fill hose assembly.
View 350-HSTEER Complete KitSteering Cylinder
Pair this helm with a compatible hydraulic steering cylinder for proper system operation and steering response.
View 350-HSTEER-CYL CylinderHydraulic Hoses
Choose the correct hose length for your boat, jack plate, setback, and rigging route.
Shop Pro Marine Hydraulic HosesFluid & Fill Accessories
Hydraulic steering fluid and fill hose assemblies help simplify installation, filling, and bleeding.
View PRO-OIL15 Hydraulic FluidView 102P Fill Hose Assembly
Key Features and Benefits
- 30cc tilt hydraulic helm pump design
- 1.83 cubic inches per revolution hydraulic displacement
- Adjustable tilt steering position for improved comfort
- Can provide quicker steering response when properly matched
- Designed for the Pro Marine 350-HSTEER hydraulic steering system
- Compatible with many standard hydraulic steering systems
- Works with Pro Marine, SeaStar®, and Uflex® style setups
- Good choice for center consoles and performance boats
- Helps reduce steering effort compared to cable steering
System Function and Connections
- System Type: Hydraulic outboard steering
- Component Type: Tilt hydraulic helm pump
- Helm Size: 30cc
- Displacement: 1.83 cu in/rev
- Connection Type: Hydraulic steering hose circuit
- Tilt Feature: Adjustable steering wheel angle
- Typical Use: Single outboard hydraulic steering systems
- Compatible Systems: Pro Marine 350-HSTEER, SeaStar®, Uflex®, and similar front-mount hydraulic steering systems
- Related Components: Steering cylinder, hydraulic hoses, steering fluid, fittings, and fill/bleed kit
FAQ
What does a tilt hydraulic helm do?
A tilt helm allows the steering wheel angle to be adjusted while also providing hydraulic steering control for the outboard engine.
What is the advantage of a tilt helm?
Tilt helms improve driver comfort by allowing the wheel position to be adjusted for seated or standing operation.
What steering systems is this helm compatible with?
It is designed for the Pro Marine 350-HSTEER system and is compatible with many standard hydraulic steering systems including Pro Marine, SeaStar®, Uflex®, and other similar front-mount hydraulic steering setups.
Is this the complete steering system?
No. This listing is for the tilt helm pump only.
Can this helm be used on center console boats?
Yes. Tilt helms are especially popular on center console boats where adjustable steering wheel positioning improves comfort and visibility.
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
350-THELM-030, tilt hydraulic helm pump, 30cc tilt helm, Pro Marine tilt helm, 1.83 cu in helm pump, SeaStar compatible tilt helm, Uflex compatible tilt helm, hydraulic steering tilt helm, adjustable tilt steering helm, outboard steering helm, 350-HSTEER tilt helm
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