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Carburetor Assembly – Fits Tohatsu/Nissan 9.9HP, 15HP, 18HP Two-Stroke (Replaces 3G2-03100-0)
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Carburetor Assembly – Fits Tohatsu/Nissan 9.9HP, 15HP, 18HP Two-Stroke (Replaces 3G2-03100-0)
This carburetor assembly is a direct-fit replacement for two-stroke Tohatsu and Nissan outboard motors, including 9.9HP, 15HP, and 18HP models. It is designed to restore original engine performance and fuel efficiency by replacing a worn or faulty carburetor.
This component directly replaces Tohatsu part numbers 3G2-03100-0, 3G2-03100-1, 3G2-03100-2, 3G2-03100-3, 3G2-03100-4, and 3G2-03100-5, as well as Sierra aftermarket part 18-7848.
- Installation Type: Direct OEM replacement that bolts on with no modifications needed.
- Compatibility: Fits Tohatsu M9.9D2, M15D2, M18E2 and Nissan NS9.9D2, NS15D2, NS18E2 series engines.
- Ready to Install: Includes all necessary internal jets and passages as per original equipment specifications.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Tohatsu | 3G2-03100-0 |
| Tohatsu | 3G2-03100-1 |
| Tohatsu | 3G2-03100-2 |
| Tohatsu | 3G2-03100-3 |
| Tohatsu | 3G2-03100-4 |
| Tohatsu | 3G2-03100-5 |
| Sierra | 18-7848 |
Compatible Engine Models
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Tohatsu | M9.9D2 | 9.9 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
| Tohatsu | M15D2 | 15 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
| Tohatsu | M18E2 | 18 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
| Nissan | NS9.9D2 | 9.9 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
| Nissan | NS15D2 | 15 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
| Nissan | NS18E2 | 18 | 2-Stroke | 3G2-03100-0 | Also fits 3G2-03100-1/2/3/4/5 variants |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Carburetor Assembly |
| Installation | Direct OEM replacement |
| Fuel Type | Gasoline (petrol) |
| Connection | Direct mount with gasket |
| Housing Material | Aluminum alloy |
| Housing Color | Silver/metallic |
| Fitting Type | Factory mounting points with gasket seal |
| Warranty | 1 year against manufacturing defects (JLM Marine) |
| Other Technical Attributes | Includes all jets and passages as OEM |
Package Contents
- 1 x Carburetor Assembly (3G2-03100-0)
Installation Guide
- Safety First: Disconnect the battery and ensure the engine is cool. Turn off the fuel supply.
- Disconnect Lines: Carefully disconnect the fuel line from the carburetor. Note the position of any throttle or choke linkages and disconnect them.
- Remove Old Carburetor: Unscrew the mounting bolts holding the carburetor to the engine manifold. Remove the old carburetor and the old gasket.
- Clean Surface: Thoroughly clean the manifold mounting surface to ensure a proper seal. Remove any old gasket material or debris.
- Mount New Carburetor: Place the new gasket and carburetor onto the manifold, then secure it with the mounting bolts. Tighten them evenly.
- Reconnect: Reattach the throttle and choke linkages and the fuel line.
- Test: Turn the fuel supply back on and check for leaks. Start the engine and check for smooth idling and proper throttle response. Adjust idle settings if necessary.
Troubleshooting & FAQ
Q: How do I confirm this carburetor fits my specific engine?
A: The best way is to check your original part number. This carburetor replaces Tohatsu part numbers 3G2-03100-0 through 3G2-03100-5 and Sierra 18-7848. You can also match your engine model (e.g., M15D2, NS18E2) with our compatibility table.
Q: What are the signs that my old carburetor is failing?
A: Common symptoms include difficulty starting, stalling at low speeds, rough idling, engine hesitation on acceleration, black smoke from the exhaust, or visible fuel leaks from the carburetor body.
Q: Are any adjustments needed after installation?
A: Our carburetors are preset to factory specifications, but minor idle speed or air/fuel mixture adjustments may be necessary depending on your specific engine's condition and local altitude.
Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.
Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.
Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.
Important Notes
- Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
- This product is an aftermarket replacement part and is not an OEM component.
- Professional installation is recommended to ensure safety and optimal performance.
Why Choose JLM MARINE?
- Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
- Fast Global Shipping: Free delivery worldwide in 5–15 days.
- Direct from Manufacturer: Competitive pricing without compromising quality.
We can ship to virtually any address in the world with free shipping available for most regions.
For our typical US and Canadian customers , our shipping timeframes are as follows:
- Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
- US warehouse shipment: orders will be delivered within 5 days after placing the order.
- China warehouse shipment: orders will be delivered about 12 days after placing the order.
When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.
Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.
Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.
As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.
We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.
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