Carburetor Assembly for Tohatsu, Nissan, Mercury & Mariner 25–30 HP 2-Stroke Outboards
Carburetor Assembly for Tohatsu, Nissan, Mercury & Mariner 25–30 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
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.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Carburetor Assembly for Tohatsu, Nissan, Mercury & Mariner 25–3...
Carburetor Assembly for Tohatsu, Nissan, Mercury & Mariner 25–30 HP 2-Stroke Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This carburetor assembly is an aftermarket replacement for selected Tohatsu and Nissan 25 HP and 30 HP 2-stroke outboards, as well as selected Mercury and Mariner 25 HP and 30 HP 2-stroke outboards for international applications.
For Tohatsu and Nissan applications, the listed fitment covers M25C3, M30A4, NS25C3, and NS30A4 models from 2002–2005. The company application record also lists Mercury and Mariner 25 HP and 30 HP 2-stroke outboards from 2001–2006 under international fitment.
- Replacement carburetor assembly for the applications listed below.
- Designed to replace the corresponding original-equipment carburetor references.
- Sold as one carburetor assembly; no separate accessory kit is specified.
Part Number Matrix
Use the following manufacturer and reference numbers when comparing the original carburetor. Number listings are provided for identification and should be confirmed against the engine model and original part before ordering.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Tohatsu | 3P0-03200-0 | OEM reference |
| Tohatsu | 3P0032000 | OEM reference |
| Tohatsu | 3P0032000M | OEM reference |
| Nissan | 346-03200-0 | OEM reference |
| Nissan | 346032000 | OEM reference |
| Nissan | 346032000M | OEM reference |
| Mercury / Mariner | 853720A1 | Listed reference |
| Mercury / Mariner | 853720A8 | Listed reference |
| Mercury / Mariner | 3303-853720A1 | Listed reference |
| Mercury / Mariner | 3303-853720A8 | Listed reference |
Engine & Model Compatibility
Keep the horsepower, 2-stroke configuration, model designation, and production year together when confirming fitment. Do not rely on horsepower alone.
| Brand | Model or Application | Rated HP | Stroke | Years | Reference Numbers |
|---|---|---|---|---|---|
| Tohatsu | M25C3 | 25 HP | 2-Stroke | 2002–2005 | 3P0-03200-0, 3P0032000, 3P0032000M |
| Tohatsu | M30A4 | 30 HP | 2-Stroke | 2002–2005 | 3P0-03200-0, 3P0032000, 3P0032000M |
| Nissan | NS25C3 | 25 HP | 2-Stroke | 2002–2005 | 346-03200-0, 346032000, 346032000M |
| Nissan | NS30A4 | 30 HP | 2-Stroke | 2002–2005 | 346-03200-0, 346032000, 346032000M |
| Mercury / Mariner | Selected international 25 HP and 30 HP 2-stroke applications | 25–30 HP | 2-Stroke | 2001–2006 | 853720A1, 853720A8, 3303-853720A1, 3303-853720A8 |
Technical Specifications
- Product Type
- Carburetor assembly
- Application
- Selected 25 HP and 30 HP 2-stroke outboard engines
- Compatible Brands
- Tohatsu, Nissan, Mercury, and Mariner
- Fuel System
- Carbureted gasoline outboard fuel system
- Package Type
- Single carburetor assembly
- Installation
- Replacement installation; verify the mounting arrangement, linkages, fuel connections, and original reference number before installation
What’s in the Box
- 1 x Carburetor assembly
Gaskets, hoses, linkages, tuning tools, and other accessories are not specified as included unless shown or stated separately in the order listing.
Installation Notes
- Confirm the engine brand, model, horsepower, stroke, production year, and original carburetor reference before beginning work.
- Stop the engine, allow it to cool, shut off the fuel supply, and disconnect the fuel line.
- If the outboard is equipped with a battery, disconnect the negative terminal according to the service manual.
- Photograph or mark the positions of the throttle, choke, and other control linkages before removal.
- Disconnect the fuel line and control linkages, then remove the fasteners securing the original carburetor.
- Clean the mounting area and remove old gasket material without allowing debris to enter the intake.
- Install the replacement carburetor using the correct gasket and the manufacturer’s specified fastener torque. A replacement gasket is not confirmed as included with this single assembly.
- Reconnect the fuel line and control linkages in their original positions, checking that each linkage moves freely.
- Restore the fuel supply and inspect carefully for leaks before starting the engine.
- Start and adjust the engine only in accordance with the applicable service manual. Do not assume that factory tuning or idle-mixture settings are preset for every application.
Troubleshooting & FAQ
How do I know whether this carburetor will fit my engine?
Match the complete application, not just the horsepower. Confirm the brand, model designation, 2-stroke configuration, year range, and original reference number against the compatibility table. For Mercury and Mariner applications, confirm that the engine is an international 25 HP or 30 HP 2-stroke model from 2001–2006 and that the original reference matches one of the listed numbers.
Is this an OEM carburetor?
No. This listing is for an aftermarket replacement assembly. The numbers shown are OEM or manufacturer reference numbers used for identification and application comparison.
Does the assembly arrive pre-tuned?
Pre-tuning is not specified. After installation, follow the engine manufacturer’s service procedure for idle speed, mixture, throttle-stop, and other adjustments required by the specific engine.
What are common signs of a carburetor problem?
Typical symptoms can include hard starting, unstable idle, stalling, hesitation, poor acceleration, fuel overflow, or an incorrect fuel mixture. Before replacing the carburetor, also inspect the fuel supply, filter, fuel lines, ignition system, and adjustment settings.
What should I check before installation?
Compare the original and replacement assemblies for mounting points, fuel inlet position, control-linkage arrangement, throat configuration, and reference number. If any critical feature differs, stop and confirm compatibility with the engine service information.
What maintenance is recommended?
Use clean, fresh fuel, keep the fuel system clean, inspect fuel lines and connections regularly, and follow the engine manufacturer’s storage procedure. For extended storage, use the recommended fuel stabilizer or drain the carburetor as directed by the service manual.
How are shipping, warranty, and returns handled?
Shipping options, warranty terms, and return eligibility are determined by the store’s current policies and the order details. Review the applicable policy before ordering and contact support if the delivered part does not match the confirmed application.
Safety & Important Information
- Verify the complete engine application and original reference number before purchase.
- This is an aftermarket replacement, not an OEM component.
- Fuel-system work should be performed in a well-ventilated area away from ignition sources.
- Professional installation is recommended when the correct linkage, adjustment, or service procedure is uncertain.
- Do not operate the engine if fuel leaks are present or if the throttle and choke controls do not move correctly.
About Sea Sierra
- Marine Replacement Parts — Replacement components for selected outboard applications.
- Application-Focused Listings — Product information is organized around engine models, horsepower, stroke, years, and reference numbers.
- Customer Support — Contact support with your engine model and original part details if you need help confirming an application.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
