Aftermarket Carburetor Assembly for Tohatsu/Nissan 8 HP and 9.8 HP 4-Stroke Outboards
Aftermarket Carburetor Assembly for Tohatsu/Nissan 8 HP and 9.8 HP 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Aftermarket Carburetor Assembly for Tohatsu/Nissan 8 HP and 9.8 HP ...
Aftermarket Carburetor Assembly for Tohatsu/Nissan 8 HP and 9.8 HP 4-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket carburetor assembly is intended as a replacement for selected Tohatsu and Nissan 8 HP and 9.8 HP four-stroke outboard applications. It is listed for MFS8, NSF8, and MFS9.8-series engines and is associated with the OEM reference numbers shown below. Confirm your exact engine model, serial range, mounting arrangement, and original carburetor number before ordering.
The assembly is designed to restore fuel metering and engine operation when the original carburetor is worn, contaminated, damaged, or otherwise no longer serviceable. The listed applications include Tohatsu/Nissan engines and may also cover equivalent Mercury or Mariner models based on the same Tohatsu powerhead; Mercury and Mariner fitment should be confirmed against the original part number and engine identification before purchase.
- Replacement carburetor assembly for selected 8 HP and 9.8 HP four-stroke outboards.
- Direct-replacement style installation for compatible applications.
- Metal-alloy construction for use in a marine engine environment.
- Accelerator-pump configuration may vary by application; compare the original unit before ordering.
Part Number Matrix
The following numbers are reference numbers associated with the listed replacement applications. They are not all guaranteed to apply to every engine variant.
| Brand | Reference Part Number |
|---|---|
| Tohatsu | 3DP-03100-0 |
| Tohatsu | 3DP-03133-0 |
| Tohatsu | 3V2-03100-2 |
| Tohatsu | 3V2-03133-2 |
| Tohatsu | 3V1-03100-2 |
| Tohatsu | 3V1-03133-2 |
| Tohatsu | 3DN-03100-0 |
| Tohatsu | 3DN-03133-0 |
| Tohatsu | 3V2-03100-3 |
| Tohatsu | 3FS-03100-0 |
Engine and Model Compatibility
Use the table as an application guide, not as a substitute for checking the engine identification label and the original carburetor. Model variants, production changes, and serial-number ranges can affect fitment.
| Brand | Model | Rated HP | Stroke | Listed Application | Reference Part No. | Notes |
|---|---|---|---|---|---|---|
| Tohatsu | MFS8 | 8 | 4-Stroke | 2003 and newer, subject to exact variant | 3DP-03100-2 | Verify the original carburetor and engine identification. |
| Nissan | NSF8 | 8 | 4-Stroke | 2003 and newer, subject to exact variant | 3DP-03100-2 | Nissan-branded version; confirm before ordering. |
| Tohatsu | MFS9.8 | 9.8 | 4-Stroke | 2003 and newer, subject to exact variant | 3DP-03100-2 | Multiple variants may exist. |
| Tohatsu | MFS9.8A | 9.8 | 4-Stroke | Listed application | 3DP-03100-2 | Check the engine label and original part. |
| Tohatsu | MFS9.8A2 | 9.8 | 4-Stroke | Listed application | 3DP-03100-2 | Check the engine label and original part. |
| Tohatsu | MFS9.8A3 | 9.8 | 4-Stroke | Listed application | 3DP-03100-2 | Check the engine label and original part. |
| Tohatsu | MFS9.8B | 9.8 | 4-Stroke | Listed application | 3DP-03100-2 | Check the engine label and original part. |
Equivalent Mercury or Mariner 8 HP and 9.8 HP four-stroke models may use related Tohatsu powerheads, but compatibility is not established by horsepower alone. Match the original carburetor, reference number, linkage arrangement, fuel connections, and mounting pattern before purchase.
Technical Specifications
- Product Type
- Carburetor assembly
- Intended Fuel
- Gasoline
- Installation
- Direct replacement for compatible applications
- Mounting
- Designed to mount to the compatible intake manifold
- Housing Material
- Metal alloy
- Housing Color
- Silver
- Accelerator Pump
- Configuration may vary by engine application; compare the original carburetor
What's in the Box
- 1 x Carburetor assembly
Gaskets, hoses, linkage hardware, adjustment tools, and other installation components are not listed as included unless supplied with the specific package. Compare the replacement assembly with the original unit before installation.
Installation Notes
- Switch off the engine, allow it to cool, and disconnect the fuel supply and battery where applicable.
- Relieve fuel-system pressure and document the fuel-hose, throttle-linkage, and choke-linkage positions before removal.
- Remove the airbox or flame arrestor cover to access the carburetor.
- Disconnect the fuel lines and control linkages, plugging or protecting open fuel lines as appropriate.
- Remove the mounting hardware and old carburetor. Clean gasket residue from the intake-manifold surface without allowing debris to enter the engine.
- Install the replacement carburetor with the correct gasket and ensure that the mounting surfaces are properly aligned.
- Tighten the mounting hardware evenly according to the engine manufacturer's service information.
- Reconnect the fuel lines, throttle linkage, and choke linkage, confirming that each moves freely through its full range.
- Reinstall the airbox or flame arrestor assembly.
- Prime the fuel system and inspect carefully for leaks before starting the engine.
- Start and test the engine in accordance with the manufacturer's service procedure. Set idle speed or mixture only when the engine documentation permits adjustment.
Troubleshooting and FAQ
How do I confirm that this carburetor fits my engine?
Confirm the brand, model, horsepower, four-stroke configuration, production information or serial range, mounting pattern, linkage arrangement, and original carburetor reference number. The listed MFS8, NSF8, and MFS9.8 applications are guides; model name and horsepower alone do not establish fitment.
Are adjustments needed after installation?
The engine may require inspection or adjustment after installation. Follow the manufacturer's service procedure for idle speed, mixture settings, choke operation, and throttle-linkage synchronization. Do not force or change adjustment screws without the correct specifications.
What symptoms can indicate a carburetor problem?
Hard starting, rough idle, stalling, hesitation, poor acceleration, fuel leakage, or abnormal exhaust smoke can be associated with carburetor contamination, worn components, incorrect adjustment, or a fuel-system fault. Diagnose the complete fuel and ignition systems before replacing parts.
How often should the carburetor be serviced?
Service intervals depend on fuel quality, storage conditions, and engine use. Inspect or clean the carburetor when symptoms occur and prepare the fuel system according to the engine manufacturer's storage instructions. Replace the assembly when internal wear, corrosion, or damage cannot be corrected reliably.
Does the assembly include an accelerator pump?
Accelerator-pump configuration can vary between engine applications. Compare the original carburetor and the applicable reference number before ordering; do not assume that every listed application uses the same configuration.
Is this an original OEM part?
No. This is an aftermarket replacement carburetor assembly. The manufacturer and part numbers shown are provided for application and reference purposes.
Safety and Important Information
- Verify the engine identification and original carburetor before ordering.
- Work in a well-ventilated area away from flames, sparks, and other ignition sources.
- Handle gasoline safely and inspect every fuel connection for leaks before operating the engine.
- Professional installation is recommended when the correct linkage, fuel-system, or adjustment procedure is uncertain.
About Sea Sierra
- Marine Replacement Parts — We provide replacement components for selected marine applications.
- Application-Focused Listings — Reference numbers and model information are supplied to help customers compare parts before ordering.
- Customer Support — Contact support with your engine model, serial information, and original part number when fitment is uncertain.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
