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Tohatsu & Nissan Outboard Parts
Shop OEM and aftermarket Tohatsu and Nissan outboard parts for maintenance, repair, troubleshooting, and complete engine service projects. Browse marine parts by system, including cooling, fuel delivery, electrical, internal engine components, lower unit parts, steering, trim, and routine service items.
Pro Marine USA carries Tohatsu and Nissan outboard engine parts for a wide range of 2-stroke, Four Stroke, EFI, and TLDI applications. Use your engine horsepower, model number, serial number, or OEM part number whenever possible to confirm fitment before ordering.
Shop Tohatsu & Nissan Outboard Parts by System
- Control Cables & Boxes
- Cooling System
- Electrical System
- Engine Oil
- Fuel & Carburetion System
- Intake System
- Internal Engine Components
- Lower Unit Components
- Oiling System
- Paints
- Service Manuals
- Steering Systems
- Transom & Midsection
- Trim System
Find the Correct Tohatsu or Nissan Outboard Part
Tohatsu and Nissan outboard parts can vary by horsepower, model number, engine family, and production range. If you are unsure which component fits your engine, use the OEM parts lookup to identify the original part number from a factory parts diagram.
Once you have the OEM part number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Common Tohatsu & Nissan Outboard Engine Families
Pro Marine supports many Tohatsu and Nissan outboards across a wide horsepower range. Always confirm the exact engine model and serial information before ordering parts.
- Portable and Small Outboards: common 2.5HP through 30HP 2-stroke and Four Stroke applications
- Midrange: 35HP through 70HP applications across multiple engine families
- Three-Cylinder Platforms: common 75HP through 90HP applications
- High-Horsepower: 115HP through 140HP applications
- EFI: electronically fuel-injected Tohatsu platforms
- TLDI: Tohatsu direct-injection 2-stroke engine families
Common Tohatsu & Nissan Repair Areas
- Engine overheating: inspect the water pump, impeller, thermostat, cooling passages, pressure-control components, and engine anodes.
- Hard starting or rough running: inspect fuel pumps, carburetors or injectors, filters, spark plugs, ignition components, and intake sealing.
- No spark or electrical problems: inspect ignition coils, stators, CDI components, rectifiers, sensors, wiring, and grounds.
- Low compression or power loss: inspect pistons, rings, cylinders, bearings, gaskets, reeds, and other internal engine components.
- Lower unit noise or water intrusion: inspect prop shaft seals, driveshaft seals, shift shaft seals, bearings, gears, and gear lube condition.
- Trim or steering problems: inspect trim motors, hydraulic components, steering systems, hoses, seals, and related rigging parts.
Why Buy Tohatsu & Nissan Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for many Tohatsu and Nissan outboard applications.
- Parts for routine maintenance, professional repair, lower units, fuel systems, electrical systems, steering, trim, and internal engine work.
- OEM diagram and part-number lookup tools to help identify the correct component before ordering.
- Dealer pricing available for qualified marine repair businesses and dealers.
- Large selection of cooling, fuel, electrical, lower unit, and service components.
- Fast weekday shipping on qualifying in-stock orders.
Frequently Asked Questions
How do I find the correct Tohatsu or Nissan outboard part?
Start with the engine horsepower, model number, serial number, and production information whenever available. Use the OEM parts lookup to identify the original part number from a factory diagram.
Can I search Tohatsu and Nissan parts by OEM part number?
Yes. Enter the 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 Tohatsu and Nissan outboard parts interchange?
Some Tohatsu and Nissan outboard applications share related engine platforms and components, but fitment should never be assumed. Confirm the model, production range, and OEM part number before ordering.
Do you carry parts for Tohatsu TLDI engines?
Yes. Pro Marine carries parts for many Tohatsu TLDI applications, including cooling, fuel, electrical, internal engine, lower unit, steering, and trim components.
Do you carry parts for older Nissan outboards?
Yes. Pro Marine carries replacement parts for many older Nissan outboard applications. Availability varies by engine family and component.
What Tohatsu and Nissan parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters where applicable, fuel filters, spark plugs, water pump kits, impellers, thermostats, gear lube, drain plug seals, anodes, and model-specific service components.
Fitment Tip: Tohatsu and Nissan outboard parts can vary by model, horsepower, engine family, and production range. Confirm the OEM part number or complete engine identification information whenever possible before ordering.
37cc Hydraulic Steering Helm Pump
Pro Marine 350-HELM-037 Hydraulic Helm Pump
The Pro Marine 350-HELM-037 Hydraulic Helm Pump is a 37cc hydraulic steering helm designed for smooth, responsive steering control on high-horsepower outboard boats.
This Pro Marine 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 37cc 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 37cc helm moves more fluid per steering wheel turn than smaller 25cc or 30cc helms, which can create quicker steering response and fewer turns lock-to-lock when matched with the correct hydraulic steering cylinder.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| Single Outboards up to 350HP | Hydraulic steering helm applications requiring quicker response |
| Bass Boats | Performance steering feel and reduced wheel turns |
| Bay Boats | Responsive control for shallow-water and open-water use |
| Center Consoles | Controlled steering feel for coastal and offshore running |
| Performance Setups | Useful where faster steering response is preferred |
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
- 37cc hydraulic helm pump design
- 2.25 cubic inches per revolution hydraulic displacement
- Moves more fluid per wheel turn than 25cc and 30cc helms
- 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 performance boats and high-horsepower outboards
- Helps reduce steering effort compared to cable steering
System Function and Connections
- System Type: Hydraulic outboard steering
- Component Type: Hydraulic helm pump
- Helm Size: 37cc
- Displacement: 2.25 cu in/rev
- Connection Type: Hydraulic steering hose circuit
- 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 37cc hydraulic helm pump do?
It converts steering wheel movement into hydraulic pressure and moves fluid through the steering system to turn the outboard.
What is the difference between a 30cc and 37cc helm?
A 37cc helm moves more fluid per wheel turn than a 30cc helm, which can reduce turns lock-to-lock and create a quicker steering feel when matched correctly.
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 helm pump only.
Should I choose the 30cc or 37cc helm?
Choose based on your steering cylinder, boat setup, and desired steering feel. The 37cc helm is generally the more responsive option.
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-HELM-037, hydraulic helm pump, 37cc helm pump, Pro Marine 37cc helm, 2.25 cu in helm pump, SeaStar compatible helm, Uflex compatible helm, hydraulic steering helm, outboard steering helm, performance steering helm, 350-HSTEER helm pump
37cc Hydraulic Steering Helm Pump
Pro Marine 350-HELM-037 Hydraulic Helm Pump
The Pro Marine 350-HELM-037 Hydraulic Helm Pump is a 37cc hydraulic steering helm designed for smooth, responsive steering control on high-horsepower outboard boats.
This Pro Marine 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 37cc 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 37cc helm moves more fluid per steering wheel turn than smaller 25cc or 30cc helms, which can create quicker steering response and fewer turns lock-to-lock when matched with the correct hydraulic steering cylinder.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| Single Outboards up to 350HP | Hydraulic steering helm applications requiring quicker response |
| Bass Boats | Performance steering feel and reduced wheel turns |
| Bay Boats | Responsive control for shallow-water and open-water use |
| Center Consoles | Controlled steering feel for coastal and offshore running |
| Performance Setups | Useful where faster steering response is preferred |
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
- 37cc hydraulic helm pump design
- 2.25 cubic inches per revolution hydraulic displacement
- Moves more fluid per wheel turn than 25cc and 30cc helms
- 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 performance boats and high-horsepower outboards
- Helps reduce steering effort compared to cable steering
System Function and Connections
- System Type: Hydraulic outboard steering
- Component Type: Hydraulic helm pump
- Helm Size: 37cc
- Displacement: 2.25 cu in/rev
- Connection Type: Hydraulic steering hose circuit
- 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 37cc hydraulic helm pump do?
It converts steering wheel movement into hydraulic pressure and moves fluid through the steering system to turn the outboard.
What is the difference between a 30cc and 37cc helm?
A 37cc helm moves more fluid per wheel turn than a 30cc helm, which can reduce turns lock-to-lock and create a quicker steering feel when matched correctly.
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 helm pump only.
Should I choose the 30cc or 37cc helm?
Choose based on your steering cylinder, boat setup, and desired steering feel. The 37cc helm is generally the more responsive option.
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-HELM-037, hydraulic helm pump, 37cc helm pump, Pro Marine 37cc helm, 2.25 cu in helm pump, SeaStar compatible helm, Uflex compatible helm, hydraulic steering helm, outboard steering helm, performance steering helm, 350-HSTEER helm pump
44cc Hydraulic Steering Helm Pump
Pro Marine 350-HELM-044 Hydraulic Helm Pump
The Pro Marine 350-HELM-044 Hydraulic Helm Pump is a 44cc hydraulic steering helm designed for fast, responsive steering control on high-horsepower outboard boats.
This Pro Marine 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 44cc 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 44cc helm moves more fluid per steering wheel turn than smaller 25cc, 30cc, or 37cc helms, which can create the quickest steering response and fewer turns lock-to-lock when matched with the correct hydraulic steering cylinder.
Read our Hydraulic Steering Comparison & Pro Tips Guide
Best Applications
| Application | Recommended Use |
|---|---|
| Single Outboards up to 350HP | Hydraulic steering helm applications requiring very quick response |
| Bass Boats | Performance steering feel and reduced wheel turns |
| Bay Boats | Fast steering response for shallow-water and open-water use |
| Center Consoles | Responsive steering feel for coastal and offshore running |
| Performance Setups | Useful where faster steering response and fewer turns are preferred |
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
- 44cc hydraulic helm pump design
- 2.68 cubic inches per revolution hydraulic displacement
- Moves more fluid per wheel turn than 25cc, 30cc, and 37cc helms
- Can provide very quick 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 performance boats and high-horsepower outboards
- Helps reduce steering effort compared to cable steering
System Function and Connections
- System Type: Hydraulic outboard steering
- Component Type: Hydraulic helm pump
- Helm Size: 44cc
- Displacement: 2.68 cu in/rev
- Connection Type: Hydraulic steering hose circuit
- 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 44cc hydraulic helm pump do?
It converts steering wheel movement into hydraulic pressure and moves fluid through the steering system to turn the outboard.
What is the difference between a 37cc and 44cc helm?
A 44cc helm moves more fluid per wheel turn than a 37cc helm, which can reduce turns lock-to-lock and create a quicker steering feel when matched correctly.
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 helm pump only.
Should I choose the 37cc or 44cc helm?
Choose based on your steering cylinder, boat setup, and desired steering feel. The 44cc helm is generally the more responsive option.
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-HELM-044, hydraulic helm pump, 44cc helm pump, Pro Marine 44cc helm, 2.68 cu in helm pump, SeaStar compatible helm, Uflex compatible helm, hydraulic steering helm, outboard steering helm, performance steering helm, 350-HSTEER helm pump
