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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.
Sierra Mercury Carburetor Float
Replacement WME Carb Float for Mercury & Mariner 2-Stroke Outboards
This Sierra 18-72000 carburetor float replaces Mercury / Quicksilver OEM part number 1395-9594.
The float is used inside compatible Mercury and Mariner WME carburetors to regulate fuel level within the carburetor bowl for proper fuel metering and dependable engine performance.
Compatible Applications
| Engine Range | Engine Type | Carburetor Family | Application Notes |
|---|---|---|---|
| Mercury / Mariner 30HP-40HP | 2-Stroke | WME Carburetors | Select 2-cylinder carbureted models using float 1395-9594 |
| Mercury / Mariner 50HP-75HP | 2-Stroke | WME Carburetors | Select 3-cylinder carburetor assemblies using compatible WME carburetors |
| Mercury / Mariner 80HP-125HP | 2-Stroke | WME Carburetors | Select 3-cylinder and 4-cylinder carbureted applications |
| Mercury XR / Sea Pro Models | 2-Stroke | WME Carburetors | Used in select commercial and performance carbureted outboards |
A damaged or fuel-soaked float may cause flooding, rich-running conditions, fuel leakage, hard starting, poor idle quality, or hesitation during acceleration.
Mercury used several WME carburetor variations across the 30HP-125HP range. Always verify your engine serial number and carburetor number before ordering carburetor components.
OEM Part Numbers & Cross References
| Reference Type | Part Number |
|---|---|
| Sierra | 18-72000 |
| Mercury / Quicksilver OEM | 1395-9594 |
| Alternate Search Format | 13959594 |
OEM Mercury Float Option
Looking for the OEM Mercury / Quicksilver carburetor float?
See the OEM Mercury 1395-9594 Carburetor Float .
Related Carburetor Repair Kit
This carburetor float is commonly used with the following carburetor rebuild kit:
Sierra 7211-1 Carburetor Kit with Needle
What a Carburetor Float Does
The carburetor float works together with the needle and seat assembly to maintain proper fuel level inside the carburetor bowl.
Maintaining the correct fuel level helps provide stable idle, clean throttle response, proper fuel delivery, and reliable engine operation.
Over time, carburetor floats may absorb fuel, crack, stick, or lose buoyancy, causing flooding or inconsistent fuel delivery.
Replacing worn carburetor floats during carburetor rebuild service helps restore reliable fuel system performance.
Features and Benefits
- Sierra aftermarket carburetor float
- Replaces Mercury / Quicksilver OEM 1395-9594
- Fits select Mercury and Mariner 30-125HP 2-stroke outboards
- Compatible with many WME carburetor applications
- Helps maintain proper carburetor fuel level
- Useful for flooding and fuel delivery repairs
- Common replacement during carburetor rebuild service
- Aftermarket alternative to OEM Mercury carburetor floats
Carburetor Float Details
- Brand: Sierra
- Part Number: 18-72000
- Part Type: Carburetor Float
- Replaces OEM: Mercury 1395-9594
- Application: Mercury / Mariner 2-Stroke Carburetors
- Horsepower Range: 30HP-125HP
- Carburetor Family: WME
- System: Fuel / Carburetor
- Quantity Sold: Each
FAQ
What does Sierra 18-72000 replace?
This float replaces Mercury / Quicksilver OEM carburetor float 1395-9594.
What outboards use this carburetor float?
This float fits select Mercury and Mariner carbureted 2-stroke outboards from approximately 30HP through 125HP.
What carburetors use this float?
It is commonly used in compatible WME carburetor applications.
What happens if a carburetor float fails?
A damaged float may cause flooding, fuel leakage, poor idle quality, rich-running conditions, or hard starting.
Is this the same float used in the Sierra carburetor kit?
Yes. This float is commonly associated with the Sierra 7211-1 carburetor repair kit with needle.
Should I verify the carburetor model before ordering?
Yes. Mercury used several WME carburetor variations across these horsepower ranges, so carburetor number verification is recommended.
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.
- Fuel system 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 Terms
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