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Outboard Motor Parts | Mercury, Yamaha, Suzuki & More
Shop outboard motor parts for maintenance, repair, troubleshooting, and full marine engine rebuild projects. This category includes OEM parts and quality OEM specification aftermarket products from Pro Marine, along with replacement marine parts for Chrysler Force, Honda, Johnson Evinrude E-tec, Mercury, Suzuki, Tohatsu Nissan, and Yamaha outboard engines.
Use this section to browse outboard parts by brand and engine system, including cooling, fuel delivery, ignition and electrical, intake, internal engine components, lower unit parts, steering, trim, transom, midsection, engine oil, service kits, gaskets, seals, carburetor parts, water pump parts, and rebuild components.
Shop Outboard Categories
Chrysler / Force Outboard Parts for Chrysler and Force outboard repair 
Honda Outboard Honda cooling, fuel, electrical, and engine parts 
Johnson / Evinrude / E-tec Outboard OMC, Johnson, Evinrude, and E-tec parts 
Mercury Outboard Mercury and Mariner service and rebuild parts 
Suzuki Outboard Suzuki maintenance, lower unit, and engine parts 
Tohatsu / Nissan Outboard Tohatsu and Nissan outboard replacement parts 
Yamaha Outboard Yamaha service, repair, and rebuild parts Common Outboard Parts Found in This Category
- Water pump kits, impellers, thermostats, and cooling system parts
- Carburetor kits, fuel pumps, fuel filters, and fuel system components
- Ignition coils, stators, switch boxes, rectifiers, sensors, and electrical parts
- Pistons, piston rings, bearings, crankshafts, sleeves, gaskets, and rebuild parts
- Lower unit seals, bearings, gears, driveshaft parts, and gearcase components
- Steering parts, control cables, trim parts, and transom components
- Engine oil, gear lube, service kits, spark plugs, seal kits, and routine maintenance parts
Common Outboard Problems and Where to Start
- Overheating: inspect the water pump, impeller, thermostat, cooling passages, and engine anodes.
- Hard starting or rough idle: check carburetor parts, fuel delivery, ignition components, spark plugs, and intake sealing.
- Weak spark or no spark: test ignition coils, stators, switch boxes, sensors, wiring, and related electrical components.
- Low compression or poor power: inspect pistons, rings, gaskets, cylinder condition, bearings, and internal engine components.
- Milky gear lube or gearcase noise: check lower unit seals, bearings, gears, driveshaft parts, and prop shaft components.
Frequently Asked Questions
What is the difference between OEM and aftermarket outboard parts?
OEM parts are made by the original engine manufacturer. Aftermarket parts are replacement parts made by other manufacturers to fit the same application. Pro Marine provides quality OEM specification aftermarket products designed for marine maintenance, repair, and rebuild work.
How do I find parts for my outboard engine?
Start by selecting your outboard brand, then choose the correct engine system category. Use your model number, serial number, horsepower, and year range to confirm fitment before ordering parts.
What information do I need before ordering outboard parts?
You should have the engine manufacturer, horsepower, model number, serial number, and any OEM part numbers from the original component when available. This helps avoid ordering parts that look similar but fit a different engine family.
Are aftermarket outboard parts reliable?
Yes, quality aftermarket outboard parts are commonly used by marine mechanics and rebuilders. Pro Marine offers OEM specification aftermarket products for many common outboard repair, maintenance, and rebuild applications.
What brands are included in the outboard category?
This category includes Chrysler Force, Honda, Johnson Evinrude E-tec, Mercury, Suzuki, Tohatsu Nissan, and Yamaha outboard parts.
Tip: Before ordering outboard parts, confirm your engine brand, horsepower, model number, serial number, and year range whenever possible.
67C-11181-01-00
8M0118180
834777
25700-90J00
25700-90J01
5033798
9-74109
5033922
9-74110
Sierra 18-8386 Lower Unit Seal Kit
The Sierra 18-8386 Lower Unit Seal Kit is a complete gearcase seal kit designed for Suzuki V6 outboard lower units. This kit includes the seals required to service the gearcase and maintain proper sealing to protect internal components.
Fitment Overview
This seal kit replaces Suzuki OEM part numbers 25700-98J00 and 25700-98J01. These OEM numbers are used across Suzuki V6 gearcase assemblies found on DF200 through DF300 outboards.
OEM diagram lookup confirms this kit is used across multiple horsepower ranges and model variants that share the same gearcase design.
Compatibility
| Brand | Model | Notes |
|---|---|---|
| Suzuki | DF200 | Standard & Select Variants |
| Suzuki | DF225 | Standard & Select Variants |
| Suzuki | DF250 / DF250S / DF250SS | Multiple Gearcase Variants |
| Suzuki | DF300 | Standard & Select Variants |
These engines share a common V6 gearcase platform where this seal kit is used.
Example Model Applications
- Suzuki DF200 V6 outboards
- Suzuki DF225 V6 outboards
- Suzuki DF250, DF250S, and DF250SS models
- Suzuki DF300 V6 outboards
These are common applications. Always verify using your OEM part number or gearcase diagram.
Fits These Serial Ranges
This seal kit is used across multiple Suzuki V6 engine generations and does not follow a single serial-number break.
Important: Confirm compatibility by matching your existing seal kit to 25700-98J01 or 25700-98J00.
Looking for this same seal kit in other brands?
View GLM Gearcase Seal Kit 8386E
Part Numbers and Cross References
| Type | Part Number |
|---|---|
| Sierra | 18-8386 |
| Suzuki OEM | 25700-98J01 |
| Suzuki OEM | 25700-98J00 |
What This Part Is Used For
This kit is used to service the lower unit (gearcase), replacing critical seals that prevent water intrusion and maintain proper lubrication of internal gears.
- Seals prop shaft, drive shaft, and shift shaft areas
- Prevents water contamination in gear oil
- Maintains proper lubrication inside the gearcase
- Helps extend gearcase life
Failed seals can allow water into the gearcase, leading to premature wear or gear failure.
System Function and Connections
- System Type: Lower unit / gearcase
- Component Type: Seal kit
- Location: Gearcase (lower unit)
FAQ
What engines does this seal kit fit?
It fits Suzuki DF200, DF225, DF250, and DF300 V6 outboards using this gearcase design.
What does this kit replace?
It replaces Suzuki part numbers 25700-98J00 and 25700-98J01.
Does this fit all DF250 models?
It fits DF250 models that use this specific gearcase. Always confirm using your OEM diagram.
When should I replace lower unit seals?
During gearcase service or if water contamination is found in the gear oil.
Searchable Part Numbers
18-8386, 25700-98J01, 25700-98J00, Suzuki DF200 seal kit, DF250 lower unit seals, DF300 gearcase seal kit
25700-98J01
850048T
850048
850048T
187-8009
41832M
6E7-85570-10-00
6E7-85570-19-00
680-85570-09-00
695-85570-10-00
95188M
95188T
96351M
17670-93954
17670-93955
17670-94400
17670-94401
17670-94402
17670-94403
17670-94404
5031758
769184