Carburetor Assembly for Tohatsu/Nissan 8HP & 9.8HP 4-Stroke Outboards – Replaces 3DP-03100-2
Carburetor Assembly for Tohatsu/Nissan 8HP & 9.8HP 4-Stroke Outboards – Replaces 3DP-03100-2 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Carburetor Assembly for Tohatsu/Nissan 8HP & 9.8HP 4-Stroke Out...
Carburetor Assembly for Tohatsu/Nissan 8HP & 9.8HP 4-Stroke Outboards – Replaces 3DP-03100-2 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket carburetor assembly is designed for selected Tohatsu and Nissan 4-stroke outboard applications rated at 8HP and 9.8HP. It provides a replacement fuel-metering assembly for restoring proper fuel delivery when the original carburetor is worn, contaminated, damaged, or no longer operating correctly.
The primary manufacturer reference associated with this replacement is 3DP-03100-2. Additional reference numbers listed below are associated cross-reference numbers for identifying the applicable replacement. Always compare the engine model, carburetor configuration, mounting arrangement, and original part before ordering.
- Replacement carburetor assembly for selected 8HP and 9.8HP 4-stroke outboards.
- Designed for use with gasoline fuel systems.
- Intended as a direct replacement where the listed reference and engine configuration match.
- Aftermarket component; not manufactured by Tohatsu, Nissan, Mercury, or Mariner.
Part Number References
Use these manufacturer reference numbers to compare the replacement with your existing carburetor and engine parts documentation.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Tohatsu / Nissan | 3DP-03100-2 | Primary reference |
| Tohatsu | 3V1-03100-2 | Cross-reference |
| Tohatsu | 3V2-03100-3 | Cross-reference |
| Tohatsu | 3FS-03100-0 | Cross-reference |
Engine Compatibility
This replacement is intended for selected Tohatsu and Nissan 4-stroke outboards in the 8HP and 9.8HP range, including model families such as MFS8, MFS9.8, and NSF9.8. Model variants can use different carburetor configurations, so horsepower alone is not sufficient for confirming fitment.
| Brand | Model Family | Rated HP | Stroke | Application Notes |
|---|---|---|---|---|
| Tohatsu | MFS8 | 8HP | 4-Stroke | Confirm exact model variant and original carburetor reference. |
| Tohatsu | MFS9.8 | 9.8HP | 4-Stroke | Confirm exact model variant and mounting configuration. |
| Nissan | NSF8 / NSF9.8 | 8HP / 9.8HP | 4-Stroke | Nissan-branded equivalents may require model-specific verification. |
Fitment reminder: Check the model designation, serial or production information when available, the original reference number, linkage arrangement, fuel connections, and mounting pattern before purchase. Do not rely on horsepower or brand alone.
Technical Specifications
- Product Type
- Carburetor assembly
- Application
- Selected Tohatsu and Nissan 8HP and 9.8HP 4-stroke outboards
- Fuel Type
- Gasoline
- Installation
- Replacement installation; verify configuration before fitting
- Product Status
- Aftermarket replacement, not an OEM component
What's in the Box
- 1 x Carburetor assembly
Gaskets, hoses, linkage hardware, adjustment tools, and other installation parts are not confirmed as included unless specifically shown or stated in the order details. Reuse or replace related hardware according to the engine manufacturer's service instructions.
Installation Notes
- Turn the engine off, allow it to cool completely, close the fuel supply, and work in a well-ventilated area away from ignition sources.
- Photograph or mark the routing and positions of the throttle, choke, fuel line, and any vacuum or vent connections before removal.
- Disconnect the fuel line and control linkages, then remove the fasteners securing the original carburetor.
- Remove the original carburetor and gasket carefully. Clean the mounting surface without allowing debris to enter the intake.
- Install a suitable gasket or required sealing components as specified for the engine, then position the replacement carburetor.
- Tighten the mounting fasteners evenly to the engine manufacturer's specified torque.
- Reconnect all fuel lines, linkages, and control cables. Confirm that the throttle and choke operate freely without binding.
- Restore the fuel supply and inspect all connections for leaks before starting the engine.
- Start and test the engine in a safe location. Follow the engine service manual for idle-speed, mixture, synchronization, and final adjustment procedures.
Troubleshooting & FAQ
How do I confirm whether this carburetor fits my engine?
Confirm that your outboard is a Tohatsu or Nissan 4-stroke model in the 8HP or 9.8HP range, then compare the exact model designation, serial or production information, original carburetor reference, mounting pattern, fuel connections, and linkage arrangement. If any of these differ, verify the application before ordering.
What do the reference numbers in the listing mean?
They are manufacturer or cross-reference numbers used to identify the applicable replacement. A number match should be checked together with the engine model and configuration; a reference number by itself does not confirm every engine variant.
What symptoms can indicate a carburetor problem?
Common symptoms include hard starting, rough or unstable idle, stalling, hesitation during acceleration, poor running under load, fuel odor, or visible fuel leakage. These symptoms can also result from restricted fuel lines, incorrect adjustment, ignition faults, or other fuel-system problems.
Will adjustment be required after installation?
Possibly. Fuel-system adjustment, idle-speed setting, or linkage synchronization may be required after installation depending on the engine and its service specifications. Use the correct service manual and do not change sealed or calibrated settings without the appropriate procedure.
Is this an OEM carburetor?
No. This listing is for an aftermarket replacement carburetor assembly. Manufacturer names and reference numbers are used only to describe application and cross-reference information.
Does the package include a gasket or accelerator pump?
The confirmed package content is one carburetor assembly. A gasket, accelerator-pump configuration, linkage hardware, or other accessories should not be assumed to be included unless specifically shown or stated with the order.
Safety & Important Information
- Gasoline is flammable. Work only in a ventilated area and keep the fuel system away from flames, sparks, and hot surfaces.
- Do not start or operate the outboard if fuel leaks are present.
- Verify the original part and engine configuration before purchase and installation.
- Professional installation is recommended when the correct adjustment or fuel-system procedure is uncertain.
- Follow all applicable engine, boating, and fuel-handling safety requirements.
About Sea Sierra
- Marine Replacement Parts — Replacement components for common marine service and repair applications.
- Application-Focused Listings — Product references and compatibility information are provided to help match the correct part.
- Support for Installation Planning — Compare your original component and engine details before ordering or fitting a replacement.
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