Carburetor for Tohatsu & Nissan 2.5HP and 3.5HP 2-Stroke Outboards – Replaces 3F0-03100-4 and 3D5-03100

Product Details

This is a direct-replacement aftermarket carburetor assembly for selected Tohatsu and Nissan 2-stroke outboard applications. The listed applications include 2.5HP and 3.5HP engines, with fitment depending on the exact engine model, production year, and—where applicable—serial-number range.

This carburetor is listed as a replacement for the following Tohatsu references: 3F0-03100-4, 3F0-03100-3, 3F0-03100-2, 3F0-03100-1, 3F0-03100-0, 3D5-03100-5, 3D5-03100-4, 3D5-03100-3, and 3D5-03100-2. Always compare the original carburetor, mounting arrangement, connections, and engine identification information before ordering.

• Complete carburetor assembly for compatible small 2-stroke outboards.
• Designed as a direct replacement for the listed applications and reference numbers.
• Suitable for gasoline-fueled marine engines when the application is confirmed.
• Package includes one carburetor assembly.

Part Number Matrix

These manufacturer reference numbers are provided for cross-reference purposes. A reference number alone does not replace confirmation of the complete engine model and applicable year or serial range.

Engine & Model Compatibility

Confirm the complete model designation and year of your engine before ordering. The model, horsepower, stroke, and year conditions must match the application shown below.

Some Mercury 2-stroke applications are identified by serial number. Locate the serial number on the transom bracket or engine identification tag and compare it with the ranges below before ordering.

Technical Specifications

Product Type

Carburetor assembly

Application

Selected small gasoline outboard engines

Installation

Direct replacement when model, year, serial number, and connections match

Engine Type

2-stroke outboard applications listed above

Fuel Type

Gasoline

What's in the Box

• 1 x Carburetor assembly

Installation Notes

1. Shut off the fuel supply and allow the engine to cool completely before beginning work.
2. Remove the engine cover and airbox or intake components as necessary to access the carburetor.
3. Record the routing and connection points of the fuel lines, throttle linkage, and choke linkage.
4. Disconnect the fuel lines and linkages, then remove the carburetor mounting hardware.
5. Clean the intake mounting surface and remove old gasket material without allowing debris to enter the intake.
6. Install the replacement carburetor with the correct gasket or sealing components for the engine application.
7. Tighten the mounting hardware evenly according to the engine manufacturer's service instructions.
8. Reconnect the fuel lines, throttle linkage, and choke linkage in their original positions.
9. Reinstall the airbox and engine cover, then inspect all fuel connections before starting the engine.
10. After starting, check for fuel leaks and verify throttle response and idle operation. Adjust only as permitted by the engine manufacturer's service procedure.

Troubleshooting & FAQ

Safety & Important Information

• Verify the engine model, year, serial number, reference number, and physical configuration before ordering.
• Disconnect the fuel supply and work in a well-ventilated area away from ignition sources.
• Use appropriate marine-engine service procedures and replace damaged gaskets, fuel lines, or clamps as required.
• This is an aftermarket replacement component, not an original manufacturer part.
• Professional installation is recommended when the required service procedure or engine specifications are unfamiliar.

About Sea Sierra

• Marine replacement parts for recreational and service applications.
• Product information organized around engine model and application details.
• Support available for fitment questions when the engine model and serial information are provided.