Carburetor Assembly – Fits Tohatsu & Nissan 4-Stroke 6HP (Replaces 3R4032000M, 3R4-03200-0)

$85.00 $136.00

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Carburetor Assembly – Fits Tohatsu & Nissan 4-Stroke 6HP (Replaces 3R4032000M, 3R4-03200-0) is backordered and will ship as soon as it is back in stock.

Worry-free returns

You may return most new, unopened items within 7 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.

Delivery and Shipping

Free standard shipping on all orders under 1 KG

If you have any questions, feel free to email us at info@sierramarines.com, and we’ll get back to you within 20–36 hours.

Product Details

This is a complete Carburetor Assembly designed for Tohatsu and Nissan 4-stroke 6HP outboard engines, specifically covering the MFS6 and NSF6 series (A2, B, and C variants) manufactured between 2002 and 2014. It ensures reliable fuel delivery for optimal engine performance.

This unit is a direct interchange for OEM part numbers like 3R4032000M, 3R4-03200-0, 3AU032000M, and their successors, ensuring a precise fit and function.

Designed for direct, hassle-free replacement of the original unit.
Engineered to meet or exceed OEM specifications for fuel mixture and flow.
Constructed from a durable, corrosion-resistant zinc alloy housing.

Part Number Matrix

Use this matrix to confirm equivalent references across OEM and aftermarket suppliers.

Brand	Part Number	Superseded By	Notes
Tohatsu	3R4032000M	3JE032000M	Original part for A2 models. Also 3R4032001M.
Tohatsu	3AU032000M	3JE032000M	Original part for B models.
Tohatsu	3JE032000M		Current OEM part number for C models.
Tohatsu / Nissan	3R4-03200-0	3JE-03200-0	Alternative reference. Also 3R4-03200-1.
Tohatsu / Nissan	3DK032000M		Alternative reference.
Tohatsu / Nissan	3DH032000M		Alternative reference.

Engine & Model Compatibility

Confirm your engine model and year in the table below to ensure accurate fitment.

Compatibility listed below covers both Tohatsu and Nissan-branded engines, as they often share the same core components and part numbers.

Brand	Model	Rated HP	Stroke	Years	OEM Part No.	Notes
Tohatsu	MFS6A2	6	4-Stroke	2002	3R4032000M/3R4032001M	Superseded to 3JE032000M
Tohatsu	MFS6B	6	4-Stroke	2005–2010	3AU032000M	Superseded to 3JE032000M
Tohatsu	MFS6C	6	4-Stroke	2011–2014	3JE032000M	Current part number
Tohatsu	MFS5B	5	4-Stroke	2005–2010	3AU032000M	Same carb as MFS6B
Nissan	NSF6A2	6	4-Stroke	2002	3R4032000M/3R4032001M	Nissan-branded equivalent
Nissan	NSF6B	6	4-Stroke	2005–2010	3AU032000M	Nissan-branded equivalent
Nissan	NSF6C	6	4-Stroke	2011–2014	3JE032000M	Nissan-branded equivalent
Nissan	NSF5B	5	4-Stroke	2005–2010	3AU032000M	Nissan-branded equivalent

Technical Specs

Product Type: Carburetor Assembly
Installation: Direct replacement
Fuel Type: Gasoline
Connection: Factory matching fittings
Housing Material: Metal (Zinc alloy)
Housing Color: Silver/Metallic
Dimensions: 90mm (3.54 in) length
Fitting Type: OEM compatible
Warranty: Varies by retailer (typically 1 year)
Other Attributes: Engineered to OEM specifications for optimal fuel delivery and engine performance

What’s in the Box

1 x Carburetor Assembly

Installation Notes

Disconnect the engine's battery and shut off the fuel supply valve.
Carefully detach the fuel lines from the existing carburetor, noting their positions.
Remove the airbox cover and filter to access the carburetor mounting hardware.
Unclip any throttle or choke linkages connected to the carburetor.
Unscrew the mounting bolts and gently remove the old carburetor assembly.
Clean the mounting surface and inspect the gasket. Replace the gasket if it shows signs of wear or damage.
Mount the new carburetor assembly, ensuring it is properly seated on the gasket.
Re-fasten the mounting bolts, tightening them to the manufacturer's recommended torque.
Reconnect all throttle and choke linkages and ensure they move freely.
Reattach the fuel lines to their correct positions on the new carburetor.
Reinstall the airbox and filter.
Turn the fuel supply on, prime the engine if necessary, and check for any leaks before starting.

Troubleshooting & FAQ

How do I know if this carburetor fits my engine?

This carburetor fits Tohatsu and Nissan 6HP 4-stroke outboards (MFS6/NSF6 series) from 2002–2014, plus some 5HP models (MFS5B/NSF5B). To be certain, please compare your engine model and year against our compatibility table and cross-reference your existing part number with those in the Part Number Matrix.

What are the signs of a failing carburetor?

Common symptoms include difficulty starting, rough or unstable idling, stalling at low speeds, poor acceleration, black smoke from the exhaust (indicating a rich fuel mixture), or visible fuel leaking from the carburetor body.

Does this carburetor require tuning after installation?

Our carburetors are direct-fit replacements engineered to OEM specs and should work out of the box with minimal to no adjustment. However, minor idle screw adjustments may be necessary to compensate for your specific engine's condition, altitude, or local climate.

What is the recommended maintenance for this carburetor?

To ensure long life, always use fresh, clean fuel and consider using a fuel stabilizer additive, especially during off-season storage. Periodically inspect for fuel leaks and ensure fuel lines are clean and unobstructed.

What is the difference between an OEM and an aftermarket part?

This listing is for a high-quality aftermarket replacement, not an original equipment manufacturer (OEM) part. It has been engineered to meet or exceed OEM-level specifications using comparable materials and was produced in an ISO 9002 certified facility with batch inspections for quality control.

How fast is shipping and what does it cost?

We ship worldwide quickly, with typical transit times of 5–15 days for most regions. Standard shipping is free for most orders; any available expedited options and their costs will be displayed at checkout.

What is the warranty and return policy?

This part is covered by a 1-year warranty against manufacturing defects under normal marine use. Should any issues arise, contact our support team with your order details. Returns are accepted within our standard window for items that are unused and in their original condition. Please see our full policy page or reach out for instructions.

Safety & Important Info

Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not order.
This is an aftermarket replacement component, not an OEM part. Brand names and part numbers are used for identification purposes only.
Professional installation is strongly recommended for safety and to ensure optimal engine performance.

About Sea Sierra

Pro-Grade Standards: We supply marine parts engineered to OEM-level tolerances and rigorously tested for real-world reliability.
Fast Global Fulfillment: We offer free standard delivery to most regions with an average transit time of 5–15 days.
Manufacturer-Direct Value: By working directly with manufacturers, we provide fair pricing without compromising on materials or quality control.

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