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Outboard Motor Parts | OEM & Aftermarket
Shop OEM and aftermarket outboard motor parts for Mercury, Yamaha, Suzuki, Honda, Johnson / Evinrude / E-TEC, Tohatsu / Nissan, and Chrysler / Force engines. Pro Marine USA carries parts for routine maintenance, troubleshooting, repair, and complete marine engine rebuilds.
Browse by outboard manufacturer or engine system, or use our OEM parts lookup to identify the correct part number before ordering. Find cooling, fuel, ignition, electrical, internal engine, lower unit, steering, trim, service kit, gasket, seal, and rebuild parts in one place.
Shop Outboard Parts by Manufacturer
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-TEC Outboard Johnson, Evinrude, E-TEC, and OMC replacement parts 
Mercury Outboard Mercury and Mariner maintenance, repair, and rebuild parts 
Suzuki Outboard Suzuki service, lower unit, fuel, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha maintenance, repair, lower unit, and rebuild parts Find the Correct Outboard Part
Not sure which part fits your engine? Start with the engine manufacturer, horsepower, model number, serial number, and year whenever available.
Our OEM parts lookup lets you view factory parts diagrams and identify the original part number for many popular outboard engines. Once you have the OEM number, search Pro Marine to find available OEM and aftermarket replacement options.
Use Our OEM Parts Lookup »Shop Outboard Parts by Engine System
Outboard engines use several interconnected systems. Select your manufacturer above to browse the exact categories available for your engine, including the following common repair and maintenance areas.
Common Outboard Problems and Where to Start
- Engine overheating: inspect the water pump, impeller, thermostat, pressure-control components, cooling passages, and engine anodes.
- Hard starting or rough idle: check fuel delivery, carburetor or injector operation, spark plugs, ignition components, filters, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes or ignition modules, sensors, wiring, grounds, and related electrical components.
- Low compression or poor power: inspect pistons, rings, cylinder condition, head and powerhead gaskets, bearings, and other internal engine components.
- Milky gear lube: inspect prop shaft, driveshaft, shift shaft, bearing carrier, and other lower unit seals for water intrusion.
- Lower unit or gearcase noise: inspect bearings, gears, clutch components, shafts, and gear lube condition before continued operation.
- Trim or steering problems: inspect hydraulic fluid level, seals, hoses, trim motors, pumps, steering cylinders, and mechanical connections.
Why Buy Outboard Parts from Pro Marine USA?
- OEM and aftermarket replacement options for major outboard engine brands.
- Marine engine parts for routine maintenance, professional repair, and complete rebuild projects.
- 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 service kits, engine parts, lower unit components, fuel system parts, electrical parts, steering, and rigging products.
- Same-day weekday shipping available on qualifying in-stock orders placed before the shipping cutoff.
OEM and Aftermarket Outboard Parts
OEM parts are supplied by the original engine manufacturer and are designed for the specific engine application. Aftermarket parts are replacement components produced by independent marine parts manufacturers and may provide additional availability or value for many common repairs.
Pro Marine carries both genuine OEM parts and quality aftermarket replacement parts for many outboard maintenance, repair, and rebuild applications. Always confirm fitment using the engine model, serial number, horsepower, year range, or OEM part number when available.
Frequently Asked Questions
How do I find the correct parts for my outboard motor?
Start by identifying the engine manufacturer, horsepower, model number, serial number, and year. Select the manufacturer above to browse by engine system, or use the OEM parts lookup to locate the original part number from a factory diagram.
Can I search Pro Marine by OEM part number?
Yes. If you already have the OEM part number, enter it 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.
What information should I have before ordering an outboard part?
Have the engine manufacturer, horsepower, model number, serial number, and year whenever possible. An OEM part number from the original component or parts diagram is especially helpful because visually similar parts may fit different engine families.
What is the difference between OEM and aftermarket outboard parts?
OEM parts come from the original engine manufacturer. Aftermarket parts are replacement components manufactured by other marine parts companies for compatible applications. Pro Marine carries both OEM and aftermarket options across many common outboard engine systems.
Are aftermarket outboard motor parts reliable?
Quality aftermarket marine parts are commonly used for maintenance, professional repair, and engine rebuilding. The best option depends on the application, manufacturer, availability, and customer preference.
Do you carry parts for older outboard motors?
Yes. Pro Marine carries parts for many older Mercury, Mariner, Johnson, Evinrude, Chrysler, Force, Yamaha, Honda, Suzuki, Nissan, and Tohatsu outboards. Availability varies by engine family and component.
What outboard parts are commonly replaced during routine maintenance?
Common maintenance items include engine oil, oil filters, fuel filters, spark plugs, water pump impellers, complete water pump kits, thermostats, gear lube, drain plug seals, anodes, and manufacturer-specific service kit components.
Fitment Tip: Outboard parts can vary by model, serial range, horsepower, and production year. Confirm the OEM part number or engine identification information whenever possible before ordering.
0778885
16510-87JL0
16510-87JL0
16510-87J00
16510-87J00
16510-87J01
16510-87J02
18-7915
18-7915-1
5031411
765560
778885
7915-1
8M0154775
9-57808
Mercury Fuel Pump Isolator
Mercury 75-115 EFI / Verado 135-300 Fuel Pump Isolator 880596509
This OEM Mercury isolator is used in Mercury fuel module lift pump applications that use OEM fuel pump kit number 880596T58. It is commonly purchased with the matching Mercury seal 880596510 when servicing the lift pump area of the fuel module.
Fitment should be verified by engine model, serial number, and OEM part number before ordering. Pro Marine also offers related lift pump options for this application, including pump-only and pump-with-seals configurations.
Compatible Applications
| Engine Family | Application | Fitment Note |
|---|---|---|
| Mercury / Mariner 75-115 EFI 4-stroke | Fuel module lift pump service | Used with fuel pump kit 880596T58. Verify serial number and parts diagram. |
| Mercury / Mariner Verado 135-300 4-stroke | 4-cylinder and 6-cylinder lift pump applications | Used with related 880596T58 lift pump applications. Confirm exact model and serial. |
Important Fitment Note
OEM number 880596509 is an isolator used in the fuel module assembly with lift pump kit 880596T58. Because Mercury fuel module parts can vary by serial range, confirm your engine serial number and compare your parts diagram before ordering.
OEM & Cross Reference Numbers
| Mercury OEM Number | 880596509 |
|---|---|
| Part Description | Isolator |
| Related Mercury Seal | 880596510 |
| Related Lift Pump Kit | 880596T58 |
| Pro Marine Pump Numbers | 80596-58P, 80596-58 |
What This Part is Used For
The 880596509 isolator helps position and isolate the lift pump in the Mercury fuel module assembly. When replacing or servicing the lift pump, inspect the related seal and surrounding fuel module components so the pump is supported and sealed correctly.
Related Fuel Pump Parts
Seal for 80596-58
OEM Mercury seal 880596510 used with this lift pump service area.
View Seal 880596510
Pro Marine Fuel Pump Lift
Aftermarket lift pump for Mercury 75-115 4-stroke and Verado 135-300 applications using 880596T58.
View Pump 80596-58P
Pro Marine Fuel Pump Kit with Seals
Pro Marine lift pump kit option for Mercury 75-115 4-stroke and Verado 135-300 4 and 6 cylinder applications.
View Pump Kit 80596-58Key Features and Benefits
- OEM Mercury Marine isolator for fuel module lift pump service.
- Used with related Mercury lift pump kit number 880596T58.
- Pairs with Mercury seal 880596510 when servicing the same pump area.
- Helps support proper lift pump positioning inside the fuel module assembly.
- Best matched by OEM number, engine serial number, and parts diagram.
Service Kit Details
| Item Number | 880596509 |
|---|---|
| Manufacturer Item | 880596509 |
| Manufacturer | Mercury Marine |
| Product Type | Fuel pump isolator |
| Fuel Pump Type | Electric fuel module lift pump application |
FAQ
Is 880596509 the lift pump?
No. 880596509 is the isolator used with the lift pump area. The related lift pump kit number is 880596T58.
Does this go with seal 880596510?
Yes. Seal 880596510 is a related Mercury fuel module seal commonly serviced with this pump area.
Will this fit every Mercury 75-115 or Verado 135-300?
Not automatically. Mercury fuel module parts can vary by model and serial number, so verify your serial number and OEM parts diagram before ordering.
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.
- Parts must be new, unused, and in original packaging.
- Installed parts are not returnable.
- Return authorization is required before sending items back.
Need help with a return or order question?
Contact Us
Phone: 941-721-3000
Searchable Terms
Mercury fuel pump isolator, Mercury Verado lift pump isolator, Mercury 75 90 115 EFI fuel module isolator, Mercury fuel supply module isolator, Mercury lift pump seal parts.
Searchable Part Numbers
880596509, 880596510, 880596T58, 80596-58P, 80596-58
18-2480
18-0646
37550
516-34
813859
881034
883775
516-44
840484
Genuine OEM Mercury Verado Steering Cylinder Seal Kit
Mercury Hydraulic Steering Cylinder Reseal Kit - 8M0045604
This genuine OEM Mercury steering cylinder seal kit is used to reseal select Mercury Verado hydraulic steering cylinder assemblies.
The kit includes the seals and O-rings commonly required during steering cylinder repair and hydraulic steering system service.
Compatible Applications
| Engine Range | Engine Type | System | Application Notes |
|---|---|---|---|
| Mercury Verado 135-400 HP | FourStroke | Hydraulic Steering | Used in compatible Mercury Verado steering cylinder assemblies |
| Mercury L6 Verado Models | Supercharged FourStroke | Hydraulic Steering | Used in compatible integrated steering systems |
| Mercury V8 and V10 Verado Models | FourStroke | Hydraulic Steering | Used in compatible Verado steering cylinder assemblies |
This genuine Mercury steering cylinder reseal kit fits select Mercury Verado hydraulic steering cylinder assemblies. Mercury OEM part number 8M0045604 supersedes older Mercury seal kit number 896173A01.
Always verify your Mercury engine model, serial number, and steering cylinder assembly before ordering.
OEM Part Numbers and Supersessions
| Brand / Type | Part Number |
|---|---|
| Genuine Mercury OEM | 8M0045604 |
| Supersedes Mercury OEM | 896173A01 |
Watch: Mercury Verado Steering Cylinder Repair and Reseal
See how a Mercury Verado steering cylinder is repaired.
Watch Pro Marine USA demonstrate steering cylinder disassembly, cleaning, inspection, seal replacement, and reassembly. The tutorial also shows an example of contaminated hydraulic steering fluid.
Watch Repair VideoThis video demonstrates the general repair process. Always verify steering cylinder compatibility and follow the applicable Mercury service procedures.
Related Steering Cylinder Seal
Need the steering cylinder attachment seal used when reinstalling the steering cylinder to the engine? See the Pro Marine 880667 Steering Cylinder Seal .
Aftermarket Alternative Available
Looking for an aftermarket replacement option? Pro Marine offers part number 2700P, an aftermarket steering cylinder seal kit for compatible Mercury Verado hydraulic steering cylinder assemblies.
View Pro Marine 2700P Steering Cylinder Seal Kit
What This Steering Cylinder Seal Kit is Used For
This genuine Mercury steering cylinder seal kit is used to reseal compatible Verado hydraulic steering cylinder assemblies.
The kit includes multiple hydraulic seals and O-rings commonly replaced during steering cylinder repair and hydraulic steering system service.
Worn or damaged steering cylinder seals may allow hydraulic fluid leakage, steering pressure loss, or reduced steering performance.
Replacing steering cylinder seals during service helps maintain proper hydraulic steering operation and reduce fluid leakage.
Common Symptoms and Replacement Reasons
- Hydraulic fluid leaking from the steering cylinder
- Visible damage or deterioration of cylinder seals
- Hydraulic steering fluid loss
- Reduced steering performance associated with seal leakage
- Steering cylinder disassembly for inspection or service
- Replacement of worn seals during cylinder rebuilding
Steering problems may also be caused by the power steering pump, hydraulic hoses, helm, fluid contamination, or other components. Proper diagnosis is recommended before replacing seals.
Key Features and Benefits
- Genuine OEM Mercury steering cylinder seal kit
- Current Mercury OEM part number 8M0045604
- Supersedes Mercury OEM seal kit 896173A01
- Fits select Mercury Verado hydraulic steering systems
- Includes seals and O-rings commonly needed for cylinder reseal service
- Helps maintain hydraulic steering pressure
- Helps reduce hydraulic fluid leakage
- Genuine Mercury replacement components
Steering Cylinder Seal Kit Details
- Brand: Genuine Mercury OEM
- Part Type: Steering Cylinder Seal Kit
- Current OEM Part Number: 8M0045604
- Supersedes OEM: 896173A01
- Application: Mercury Verado Steering Cylinder Assemblies
- System: Hydraulic Steering System
- Use: Steering cylinder reseal service
- Quantity Sold: Kit
Installation and Repair Tips
- Verify steering cylinder compatibility before beginning repairs.
- Follow the applicable Mercury service manual for disassembly and reassembly.
- Inspect internal cylinder surfaces for scoring, corrosion, and damage.
- Keep hydraulic components clean to prevent introducing contamination.
- Use the hydraulic steering fluid specified for your Mercury steering system.
- Follow the manufacturer's bleeding and testing procedures after repair.
Important: Hydraulic steering is a safety-critical system. Repairs should be performed by qualified personnel using appropriate Mercury service procedures.
Frequently Asked Questions
What does Mercury 8M0045604 fit?
This seal kit fits select Mercury Verado hydraulic steering cylinder
assemblies using compatible steering system components.
Does Mercury 8M0045604 replace 896173A01?
Yes. Mercury OEM part number 8M0045604 supersedes
older seal kit number 896173A01.
What is included in this kit?
The kit includes the seals and O-rings commonly required
to reseal compatible Verado steering cylinders.
Can damaged steering cylinder seals cause fluid leaks?
Yes. Worn or damaged seals may allow hydraulic fluid
leakage and reduced steering performance.
Will this kit fix every Mercury Verado steering problem?
No. Steering problems may also involve the power steering pump,
helm, hydraulic hoses, or other system components.
Proper diagnosis is recommended.
Is there a video showing how to rebuild a Mercury Verado steering cylinder?
Yes. Pro Marine USA provides a steering cylinder repair tutorial
demonstrating disassembly, cleaning, inspection, seal replacement,
and reassembly. Click the video preview above to watch.
Do I need the additional steering cylinder attachment seal?
Depending on the repair, the steering cylinder attachment seal
may also need replacement. See Pro Marine part number 880667.
Is there an aftermarket alternative?
Yes. Pro Marine 2700P is an aftermarket replacement
seal kit for compatible Mercury Verado steering cylinders.
Should I verify fitment before ordering?
Yes. Mercury used multiple steering cylinder configurations.
Verify your engine serial number and steering cylinder
assembly before purchasing.
Dealer Discounts and 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 in the 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.
- Hydraulic steering components should be installed only after confirming correct fitment.
- 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 Part Numbers
8M0045604, 896173A01
Searchable Terms
Mercury 8M0045604, Mercury 896173A01, Genuine Mercury steering cylinder seal kit, Mercury Verado steering seal kit, Mercury hydraulic steering kit, Verado steering cylinder reseal kit, Mercury steering rebuild kit, Mercury Verado seal kit, Verado hydraulic steering seal kit, Mercury steering ram seal kit, Mercury steering cylinder service kit, Verado steering repair kit, Mercury Verado steering cylinder repair video, Mercury Verado steering cylinder rebuild, Mercury Verado steering cylinder seal replacement
8M0045604
896173A01
139372
139374
139376
18-0320
32220
509247
9-60061
516-52
880122
841220