Carburetor Assembly – Fits Tohatsu/Nissan 18HP MX18E2 (Replaces Tohatsu 3LD-03100-2, Nissan 3LD03100M)
Carburetor Assembly – Fits Tohatsu/Nissan 18HP MX18E2 (Replaces Tohatsu 3LD-03100-2, Nissan 3LD03100M) 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 Assembly – Fits Tohatsu/Nissan 18HP MX18E2 (Replaces Toh...
Carburetor Assembly – Fits Tohatsu/Nissan 18HP MX18E2 (Replaces Tohatsu 3LD-03100-2, Nissan 3LD03100M) is backordered and will ship as soon as it is back in stock.
Product Details
This is a complete Carburetor Assembly – Fits Tohatsu/Nissan 18HP MX18E2, engineered as a direct-fit replacement for Tohatsu/Nissan 2-stroke 18 HP engines, specifically the MX18E2 models. It is built to meet or exceed original equipment specifications, ensuring reliable fuel delivery and performance.
It directly replaces Tohatsu part numbers 3LD-03100-0, 3LD-03100-1, and 3LD-03100-2, as well as Nissan 3LD03100M and Sierra 18-7357, offering a seamless interchange.
- Designed for simple bolt-on installation.
- Pre-calibrated for Tohatsu/Nissan 18HP 2-stroke outboards.
- Housing constructed from durable cast aluminum.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number | Notes |
|---|---|---|
| Tohatsu | 3LD-03100-2 | Supersedes 3LD-03100-0 and 3LD-03100-1 |
| Nissan | 3LD03100M | |
| Sierra | 18-7357 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Tohatsu | MX18E2 | 18 | 2-Stroke | 3LD-03100-2 | Supersedes 3LD-03100-1 and 3LD-03100-0 |
| Nissan | 18 | 2-Stroke | 3LD03100M | Rebranded Tohatsu - same engine |
Technical Specs
- Product Type
- Carburetor Assembly
- Installation
- Direct bolt-on replacement
- Fuel Type
- Gasoline (regular unleaded)
- Connection
- Multiple fuel line and linkage connections
- Housing Material
- Cast Aluminum
- Housing Color
- Silver
- Weight
- Approx. 0.1 kg (0.22 lbs)
- Warranty
- 1 year against manufacturing defects (JLM Marine)
What’s in the Box
- 1 × Carburetor Assembly (3LD-03100-2)
Installation Notes
- Ensure the engine is turned off and cooled down completely.
- Disconnect the battery to prevent accidental starting.
- Remove the engine cover to access the carburetor.
- Carefully disconnect and label all fuel lines and linkages.
- Remove the old carburetor, noting its orientation and connections.
- Install the new carburetor, ensuring all connections are properly aligned.
- Reconnect all fuel lines and linkages to their original positions.
- Perform initial adjustments according to your engine's service manual.
- Test run the engine in a safe, ventilated area and make fine adjustments as needed.
Troubleshooting & FAQ
How do I confirm this carburetor fits my motor?
This carburetor is specifically for Tohatsu/Nissan 18 HP 2-Stroke MX18E2 models. The best way to confirm fit is to match your old carburetor's part number to the ones listed in the Part Number Matrix section, such as 3LD-03100-2 for Tohatsu or 3LD03100M for Nissan.
What are the signs my old carburetor is failing?
Common signs of a failing carburetor include difficulty starting, rough idling, stalling at low speeds, poor acceleration, black smoke from the exhaust (running rich), or visible fuel leaks from the carburetor body.
Will I need to adjust this carburetor after installation?
While our carburetors are preset, minor adjustments to the idle speed or air/fuel mixture may be necessary to match your specific engine and local environmental conditions (altitude, temperature). Always refer to your engine's service manual for the correct adjustment procedure.
What is the difference between this part and an OEM Tohatsu part?
This is an aftermarket part designed to function identically to the OEM original. It is made with comparable materials and to the same specifications but at a more competitive price point. It is not manufactured or branded by Tohatsu/Nissan.
What maintenance is required for this carburetor?
To ensure long life, use clean, fresh fuel and a good quality fuel filter. If storing the engine for an extended period, it's best to run the carburetor dry or use a fuel stabilizer to prevent gum and varnish buildup.
Are any special gaskets or seals included?
The product includes only what is shown in the pictures and listed in the "What's in the Box" section. You should typically reuse your existing mounting hardware. We recommend replacing any old gaskets during installation to ensure a proper seal.
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 vs 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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