Carburetor Assembly for Tohatsu/Nissan 15HP & 20HP 4-Stroke Outboards – Replaces 3BJ-03100-0, 3BH-03100-0
Carburetor Assembly for Tohatsu/Nissan 15HP & 20HP 4-Stroke Outboards – Replaces 3BJ-03100-0, 3BH-03100-0 is backordered and will ship as soon as it is back in stock.
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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.
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Carburetor Assembly for Tohatsu/Nissan 15HP & 20HP 4-Stroke Out...
Carburetor Assembly for Tohatsu/Nissan 15HP & 20HP 4-Stroke Outboards – Replaces 3BJ-03100-0, 3BH-03100-0 is backordered and will ship as soon as it is back in stock.
Product Details
This is a complete aftermarket carburetor assembly for specified Tohatsu and Nissan 15HP and 20HP four-stroke outboard engines. The listed applications include Tohatsu F15C and MFS15C models, Nissan NSF15C models, and Tohatsu F20C and MFS20C models. Compare your engine model, year, original carburetor, and part number before ordering.
This replacement carburetor is listed for use with reference numbers including Tohatsu/Nissan 3BJ-03100-0, 3BH-03100-0, 3AZ-03133-0, 3BA-03133-0, 3BH031000M, 3AZ031330M, 3BJ031000M, and 3BH031330M, as applicable to the engine version. These numbers are provided for identification and cross-reference; they do not replace confirmation of the exact engine application.
- Complete carburetor assembly for the listed four-stroke outboard applications.
- Designed as a direct replacement for the corresponding original carburetor.
- Includes a manual-choke connection consistent with the listed application.
- Metal housing suitable for normal marine engine service.
Part Number Matrix
Use the following numbers to compare the original carburetor with this replacement. Confirm the complete number and engine application before purchase.
| Brand | Reference Part Number |
|---|---|
| Tohatsu/Nissan | 3BJ-03100-0 |
| Tohatsu/Nissan | 3BH-03100-0 |
| Tohatsu/Nissan | 3AZ-03133-0 |
| Tohatsu/Nissan | 3BA-03133-0 |
| Tohatsu/Nissan | 3BH031000M |
| Tohatsu/Nissan | 3AZ031330M |
| Tohatsu/Nissan | 3BJ031000M |
| Tohatsu/Nissan | 3BH031330M |
Engine & Model Compatibility
The applications below reflect the listed model, horsepower, stroke, and year conditions. Model designations and part numbers can vary by starting system, control type, and production year. Confirm your engine identification label and original part before installation.
| Brand | Model | Rated HP | Stroke | Listed Years | Reference Part Number(s) | Version Notes |
|---|---|---|---|---|---|---|
| Tohatsu | F15C | 15 | 4-Stroke | 2008–2014 | 3BH-03100-0 / 3BH031000M | MF/EF version |
| Tohatsu | F15C | 15 | 4-Stroke | 2008–2014 | 3AZ-03133-0 / 3BH-03133-0 / 3BH031330M | EP/EPT version |
| Tohatsu | MFS15C | 15 | 4-Stroke | 2008–2014 | 3BH-03100-0 / 3BH031000M | MF/EF version |
| Tohatsu | F20C | 20 | 4-Stroke | 2008–2014 | 3BJ-03100-0 | Confirm the original carburetor number. |
| Tohatsu | MFS20C | 20 | 4-Stroke | 2008–2014 | 3BJ-03100-0 | Confirm the original carburetor number. |
| Brand | Model | Rated HP | Stroke | Listed Years | Reference Part Number(s) | Version Notes |
|---|---|---|---|---|---|---|
| Nissan | NSF15C | 15 | 4-Stroke | 2009 | 3BH-03100-0 / 3BH031000M | MF/EF version |
| Nissan | NSF15C | 15 | 4-Stroke | 2009 | 3AZ-03133-0 / 3BH-03133-0 / 3BH031330M | EP/EPT version |
| Nissan | NSF20C | 20 | 4-Stroke | 2009 | 3BJ-03100-0 | Confirm the original carburetor number. |
Technical Specs
- Product Type
- Carburetor Assembly
- Application
- Specified Tohatsu and Nissan 15HP and 20HP 4-stroke outboard engines
- Installation
- Direct replacement
- Fuel Type
- Gasoline
- Choke Connection
- Manual choke
- Housing Material
- Metal
- Housing Color
- Silver/aluminum
- Fitting Type
- Direct mount
- Component Status
- Aftermarket replacement; not an OEM-branded component
What’s in the Box
- 1 × Carburetor Assembly
Gaskets, seals, fittings, or other accessories are included only if supplied with the assembly shown for the applicable version. Compare the delivered components with the original carburetor before installation.
Installation Notes
- Ensure the engine is switched off and cool. Shut off the fuel supply and disconnect the spark plug wire.
- Photograph or mark the fuel lines, choke connection, and any linkage before removal.
- Disconnect the fuel lines and linkage from the original carburetor.
- Remove the mounting hardware and carefully take off the old carburetor.
- Clean the intake mounting surface and remove old gasket material without allowing debris to enter the engine.
- Install the replacement carburetor with the correct new gasket or sealing components for the application. Tighten the mounting hardware evenly.
- Reconnect the fuel lines, choke connection, and linkage to their original positions.
- Restore the fuel supply and inspect all connections for leaks before starting the engine.
- Start and test the engine in a safe, well-ventilated area. Check idle and throttle operation according to the engine service information.
Troubleshooting & FAQ
How can I confirm that this carburetor fits my engine?
Compare the complete number on your original carburetor with the reference numbers listed above, then confirm the engine brand, model, horsepower, stroke, year, and version. The same horsepower rating alone does not establish fitment.
What are common signs of a failing carburetor?
Possible symptoms include hard starting, rough idle, stalling, poor acceleration, excessive smoke, inconsistent running, or fuel leakage. These symptoms can also result from fuel-system, ignition, or adjustment problems, so inspect the complete system before replacing the carburetor.
Is adjustment needed after installation?
Inspection and adjustment may be necessary after installation. Follow the service information for your exact engine and do not change adjustment settings without confirming the correct procedure.
Can I clean my old carburetor instead of replacing it?
Cleaning may correct problems caused by dirt, varnish, or stale fuel. Worn gaskets, seals, jets, or other internal parts may still require replacement. Compare the condition of the original carburetor with the replacement before deciding which repair is appropriate.
What do the MF/EF and EP/EPT designations mean?
These designations identify different equipment or control configurations. MF and EF are associated with manual- or electric-start tiller-style versions, while EP and EPT identify remote-control versions with additional equipment distinctions. Confirm the exact version and reference number for your engine before ordering.
Is this an OEM carburetor?
No. This listing is for an aftermarket replacement carburetor assembly intended for the specified applications. It is not sold as an OEM-branded component.
What should I check before installation?
Check the carburetor body, mounting pattern, fuel-line connections, choke connection, linkage, gasket arrangement, and reference number against the original part. Do not install the assembly if the connections or physical configuration differ.
Safety & Important Information
- Work only on a cool, non-running engine in a well-ventilated area.
- Keep fuel away from flames, sparks, hot surfaces, and ignition sources.
- Verify the engine model, year, stroke, version, and original part number before purchase.
- Do not operate the engine if fuel leaks are present.
- Professional installation is recommended if you are unfamiliar with marine fuel systems or carburetor adjustment.
About Sea Sierra
- Marine Replacement Parts — Parts are listed with application and cross-reference information to help identify the correct replacement.
- Application-Focused Support — Compare model and part-number details before ordering or installing.
- Practical Replacement Solutions — Aftermarket components for common marine engine service needs.
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