Carburetor – Fits Mercury Mariner 6HP 8HP 9.8HP 2-Stroke (Replaces 3B2-03200, 3303-803687A04)
Carburetor – Fits Mercury Mariner 6HP 8HP 9.8HP 2-Stroke (Replaces 3B2-03200, 3303-803687A04) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Carburetor – Fits Mercury Mariner 6HP 8HP 9.8HP 2-Stroke (Replaces ...
Carburetor – Fits Mercury Mariner 6HP 8HP 9.8HP 2-Stroke (Replaces 3B2-03200, 3303-803687A04) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Carburetor – Fits Mercury Mariner 6HP 8HP 9.8HP 2-Stroke is engineered for reliable fuel delivery across Mercury Mariner 6HP, 8HP, and 9.8HP 2-stroke outboard engines. Designed to match OEM tolerances, it restores proper air-fuel mixture for smooth idling, responsive throttle, and consistent power output.
This carburetor directly replaces OEM part numbers 3B2-03200, 3303-803687A04, ensuring straightforward interchange with factory components.
- Includes matched paper gasket (27-16327) for leak-free installation
- Compatible with standard marine fuel formulations
- Drop-in replacement requiring basic hand tools
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Mercury Mariner | 3B2-03200 | Primary OEM reference |
| Mercury Mariner | 3303-803687A04 | Alternate OEM reference |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. |
|---|---|---|---|---|
| Mercury Mariner | Mercury Mariner | 6HP | 2-Stroke | 3B2-03200 |
| Mercury Mariner | Mercury Mariner | 8HP | 2-Stroke | 3B2-03200 |
| Mercury Mariner | Mercury Mariner | 9.8HP | 2-Stroke | 3B2-03200 |
Technical Specs
- OEM Part Number
- 3B2-03200
- Alternate OEM Reference
- 3303-803687A04
- Engine Type
- 2-Stroke Outboard
- Compatible Brands
- Mercury Mariner
- Horsepower Range
- 6HP, 8HP, 9.8HP
What's in the Box
- Carburetor (1 unit)
- Paper Gasket 27-16327
Installation Notes
- Disconnect the fuel line and remove the engine cowling. Allow any residual fuel to drain safely.
- Disconnect throttle and choke linkages, noting their original positions for reassembly.
- Unbolt the old carburetor from the intake manifold or reed valve housing.
- Remove the old gasket and clean all mating surfaces with a non-abrasive cleaner.
- Install the new paper gasket (27-16327) onto the intake flange, ensuring proper alignment.
- Mount the new carburetor and torque fasteners evenly to manufacturer specification.
- Reconnect throttle and choke linkages, verifying smooth operation through full range of motion.
- Attach the fuel line and check for leaks before starting the engine.
- Start the engine and allow it to warm up, then adjust idle mixture and speed as needed.
Troubleshooting & FAQ
How do I know if my carburetor needs replacement?
Common signs include hard starting, rough idle, inconsistent throttle response, excessive fuel consumption, or black smoke from the exhaust. If cleaning and adjustment don't resolve these issues, replacement is typically necessary.
Will this fit my 8HP engine even though it's listed for 9.8HP?
Yes. Mercury Mariner 6HP, 8HP, and 9.8HP 2-stroke engines share the same carburetor design. Verify your OEM part number matches 3B2-03200 or 3303-803687A04 before purchasing.
Is the gasket included, or do I need to order it separately?
The package includes paper gasket 27-16327. You do not need to order it separately.
Can I use this carburetor with ethanol-blended fuel?
This carburetor is compatible with standard marine fuel formulations, including ethanol blends up to E10. For best results, use fresh fuel and add a quality fuel stabilizer if storing the engine for extended periods.
What adjustments are needed after installation?
After installation, warm up the engine and adjust the idle speed screw and idle mixture screw to achieve smooth, stable idling. Consult your engine's service manual for specific adjustment procedures and target RPM.
How often should a carburetor be replaced?
Carburetors don't have a fixed replacement interval. Replace when cleaning and rebuilding no longer restore proper function, or if internal passages are corroded or damaged beyond repair.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications against your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
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