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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.
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
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