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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.
0174955
0175103
0175107
0175109
0175231
0175247
0435555
0435556
0435558
0435560
0435742
0435781
0435782
0435784
0435926
0435936
0435952
0435953
0435955
0435956
0436203
0436206
0438094
0438400
0769076
5004558
5007420
769076
0765577
335362
765577
0432443
0435009
174404
3852225
432443
435009
435009
Ignition System
Genuine Mercury Spark Plug - 8M0180173
OEM Mercury Iridium Spark Plug for 500-600hp V12 outboards.
Delivers reliable ignition, improved combustion efficiency, and longer service life.
Compatible Applications
Mercury V12 Outboards. Verify with your engine serial number for exact fitment.
Important Fitment Note
Always confirm compatibility using your engine serial number before ordering.
OEM & Cross Reference Numbers
| OEM | 8M0180173, 8M0178257 |
What This Part Is Used For
This iridium spark plug provides reliable ignition for Mercury V12 outboard engines.
Replacing spark plugs at recommended intervals improves starting, performance, and fuel efficiency.
Key Features and Benefits
- Genuine Mercury OEM quality
- Iridium electrode for longer life and better spark
- Optimized for high-performance V12 engines
- Improves combustion efficiency
FAQ
What engines does this spark plug fit?
Mercury V12 outboards. Verify with serial number.
How often should spark plugs be replaced?
Follow the Mercury service schedule for your specific model (typically every 100-200 hours or annually).
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 V12 spark plug, 8M0180173, Mercury outboard spark plug, V12 iridium spark plug, 8M0178257
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Searchable Part Numbers
8M0180173 8M0178257
8M0180173
Pro Marine SHOWA Tilt & Trim Seal Kit
Evinrude Johnson 40-300HP SHOWA Tilt & Trim Seal Kit - 4519P
The Pro Marine 4519P Tilt & Trim Seal Kit is an aftermarket replacement seal kit for compatible SHOWA hydraulic power trim and tilt assemblies used on a very wide range of Johnson, Evinrude, OMC, and BRP outboards.
This kit replaces OEM numbers 0434519, 434519, 0778218, and 778218. Verified applications extend from select 40HP through 300HP engines and include conventional 2-stroke models, Ficht / FFI engines, direct-injection and E-TEC families, 3.3L and 3.4L V6 engines, and later Evinrude G2 2.7L V6 applications.
Compatible Applications
| Engine Family | Verified Application Range |
|---|---|
| Johnson / Evinrude 40-90HP | Select 40, 50, 60, 65, 70, 75, 88, and 90HP outboards using compatible SHOWA trim and tilt assemblies. |
| Johnson / Evinrude 100-140HP | Select 100, 105, 115, 120, 125, 130, 135, and 140HP models including standard, commercial, jet, Ficht / FFI, and later direct-injection configurations. |
| Johnson / Evinrude 150-185HP | Extensive 150, 175, and 185HP coverage including standard, counter-rotation, commercial, military, Ficht / FFI, H.O., and multiple shaft-length configurations. |
| Johnson / Evinrude 200-225HP | Extensive 200 and 225HP applications including 60-degree V6, 90-degree V6 3.3L, Ficht / RAM Injection, H.O., counter-rotation, and 20", 25", and 30" shaft configurations. |
| Evinrude 250HP | Select 250HP 90-degree V6 3.3L and 3.4L applications including standard, H.O., Ficht / RAM Injection, counter-rotation, and multiple shaft lengths. |
| Evinrude 300HP | Select 300HP 90-degree V6 3.4L applications in standard, counter-rotation, and multiple shaft-length configurations. |
| Evinrude Ficht / FFI | Numerous 75-250HP Ficht Fuel Injection and FFI applications are included in the verified model list. |
| Evinrude E-TEC / Direct Injection | Numerous later direct-injection applications including 60-degree V6, 3.3L V6, and 3.4L V6 model families. |
| Evinrude G2 2.7L V6 | Select G2 150HP, 175HP, and 200HP 66-degree 2.7L V6 applications, including standard and counter-rotation configurations. |
This seal kit has an extremely broad application range, but not every Johnson or Evinrude engine uses the same trim and tilt unit.
Verify the complete engine model number and confirm that the SHOWA trim / tilt assembly calls for OEM seal kit 0434519, 434519, 0778218, or 778218 before ordering.
Notable Fitment Families
- Johnson and Evinrude 40-90HP outboards
- Johnson and Evinrude 100-140HP outboards
- Johnson and Evinrude 150-175HP V6 outboards
- Johnson and Evinrude 200-225HP V6 outboards
- Select Evinrude 250HP 3.3L and 3.4L V6 models
- Select Evinrude 300HP 3.4L V6 models
- Ficht / FFI fuel-injected applications
- Ficht RAM Injection applications
- Evinrude E-TEC / direct-injection applications
- Evinrude H.O. applications
- Standard and counter-rotation models
- 20", 25", and 30" shaft configurations where listed
- Commercial and select military applications
- Evinrude G2 150, 175, and 200HP 2.7L V6 applications
OEM & Cross Reference Numbers
| Brand / Type | Part Number |
|---|---|
| Pro Marine | 4519P |
| OMC / BRP OEM | 0434519 |
| OMC / BRP OEM | 434519 |
| OMC / BRP OEM | 0778218 |
| OMC / BRP OEM | 778218 |
OEM BRP / OMC Version Available
OEM BRP / OMC 434519 SHOWA Tilt & Trim Seal Kit
Prefer the original factory seal kit? The OEM 434519 SHOWA tilt and trim seal kit is available for the same compatible applications.
What This Part is Used For
The power trim and tilt unit uses hydraulic pressure to raise, lower, trim, and tilt the outboard. Internal seals and O-rings keep hydraulic fluid contained while allowing the trim and tilt pistons to move under pressure.
Over time, hydraulic seals can harden, flatten, tear, or wear. A leaking SHOWA trim unit may lose fluid, slowly allow the engine to settle down after being trimmed up, or fail to maintain the selected trim position.
The Pro Marine 4519P seal kit provides an aftermarket option for rebuilding compatible SHOWA hydraulic trim and tilt assemblies instead of replacing the complete trim unit.
Common Signs Your Trim & Tilt Unit Needs Service
- Hydraulic fluid leaking around trim or tilt cylinder rods
- Engine slowly settles down after being trimmed or tilted up
- Trim system will not hold the selected position
- Repeated need to add trim / tilt fluid
- Visible fluid around the SHOWA hydraulic assembly
- Old rod seals appear cracked, flattened, or deteriorated
Why Choose the Pro Marine 4519P?
- Pro Marine aftermarket SHOWA trim and tilt seal kit
- Lower-cost alternative to the OEM 434519 seal kit
- Replaces OEM numbers 0434519, 434519, 0778218, and 778218
- Extensive Johnson, Evinrude, OMC, and BRP application coverage
- Fits select applications from 40HP through 300HP
- Coverage includes conventional, Ficht / FFI, E-TEC, and G2 engine families
- Used on compatible SHOWA hydraulic power trim and tilt assemblies
- Helps repair hydraulic leaks without replacing the complete trim unit
- OEM 434519 version linked above
FAQ
What does Pro Marine 4519P replace?
Pro Marine 4519P replaces OEM numbers 0434519, 434519, 0778218,
and 778218.
What engines does 4519P fit?
It fits a very large number of Johnson, Evinrude, OMC, and BRP outboards
equipped with compatible SHOWA trim and tilt assemblies. Verified
applications range from select 40HP engines through 300HP models.
Does it fit older Johnson and Evinrude models?
Yes. The verified fitment includes numerous engines from the early and
late 1990s as well as later BRP / Evinrude applications.
Does it fit Ficht and FFI engines?
Yes. Numerous Ficht / FFI and Ficht RAM Injection applications are
included in the supplied fitment.
Does it fit Evinrude E-TEC models?
Yes. Numerous direct-injection Evinrude model families are included in the
verified application list.
Does 4519P fit Evinrude G2 engines?
Yes. Verified applications include select G2 150HP, 175HP, and 200HP
66-degree 2.7L V6 models.
Does it fit 250HP and 300HP Evinrude engines?
Yes. The supplied fitment includes numerous 250HP 3.3L / 3.4L and 300HP
3.4L V6 model numbers.
Is this an OEM seal kit?
No. This is the Pro Marine aftermarket version. The OEM
BRP / OMC 434519 seal kit is linked above.
How should I verify fitment?
Use your complete Johnson / Evinrude model number and verify that the SHOWA
trim and tilt assembly calls for one of the OEM numbers listed above.
Horsepower alone is not enough to identify the correct seal kit.
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
4519P, Pro Marine 4519P, 434519, 0434519, 0778218, 778218, OMC 434519, BRP 434519, Evinrude SHOWA seal kit, Johnson SHOWA seal kit, Evinrude tilt trim seal kit, Johnson tilt trim seal kit, SHOWA hydraulic seal kit, Evinrude trim cylinder seals, Johnson trim cylinder seals, Evinrude power trim repair kit, Johnson power trim repair kit, 40HP Evinrude trim seal kit, 90HP Evinrude trim seal kit, 115HP Evinrude trim seal kit, 150HP Evinrude trim seal kit, 175HP Evinrude trim seal kit, 200HP Evinrude trim seal kit, 225HP Evinrude trim seal kit, 250HP Evinrude trim seal kit, 300HP Evinrude trim seal kit, Evinrude Ficht trim seal kit, Evinrude E-TEC trim seal kit, Evinrude G2 trim seal kit, aftermarket 434519 seal kit
0778218
434519
778218
25700-90J00
25700-90J01
5033798
25700-92J00
5033922
769712
87867
9-74110