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Description
Fuel Pump Assembly – Fits Tohatsu/Nissan 4-9.8 HP & Mercury/Mariner 4-6 HP 4-StrokeFuel Pump Assembly Fits Tohatsu Nissan 4 9. 8 HP & Mercury Mariner 4 6 HP 4 Stroke (Replaces 3H6 04000 7, 803529T06) This fuel pump assembly is designed for a precise fit on a range of Tohatsu, Nissan, Mercury, and Mariner 4 stroke outboard motors. It fits Tohatsu Nissan models from 4 HP to 9. 8 HP and Mercury Mariner models from 4 HP to 6 HP, ensuring reliable fuel delivery for optimal engine performance. As a direct replacement, this assembly
Fuel Pump Assembly – Fits Tohatsu/Nissan 4-9.8 HP & Mercury/Mariner 4-6 HP 4-Stroke (Replaces 3H6-04000-7, 803529T06)
This fuel pump assembly is designed for a precise fit on a range of Tohatsu, Nissan, Mercury, and Mariner 4-stroke outboard motors. It fits Tohatsu/Nissan models from 4 HP to 9.8 HP and Mercury/Mariner models from 4 HP to 6 HP, ensuring reliable fuel delivery for optimal engine performance.
As a direct replacement, this assembly supersedes multiple Tohatsu and Mercury part numbers, including Tohatsu 3H6-04000-7 and Mercury 803529T06. It provides a straightforward solution for replacing old, worn, or malfunctioning fuel pumps.
- Installation: Installs as a direct OEM-style replacement.
- Fuel Compatibility: Designed for use with Gasoline.
- Housing: Constructed from a durable alloy for corrosion resistance.
Part Number Cross-Reference
Use this table to confirm equivalent part numbers across brands. This part is a direct replacement for the following OEM numbers.
| Brand | Part Number | Superseded By |
|---|---|---|
| Tohatsu | 3H6-04000-0 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-1 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-2 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-3 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-4 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-5 | 3H6-04000-7 |
| Tohatsu | 3H6-04000-6 | 3H6-04000-7 |
| Mercury | 803529T1 | 803529T06 |
| Mercury | 803529T02 | 803529T06 |
| Mercury | 803529T03 | 803529T06 |
Compatible Engine Models
Confirm your engine model/year in the table below.
For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.
| Brand | Model | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|---|
| Tohatsu | MFS4A2 | 4 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS4B | 4 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS5A2 | 5 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS5B | 5 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS6A2 | 6 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS6B | 6 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS8A | 8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS8A2 | 8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS8A3 | 8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS9.8A | 9.8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS9.8A2 | 9.8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Tohatsu | MFS9.8A3 | 9.8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Nissan | NSF4A2 | 4 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Nissan | NSF5A2 | 5 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Nissan | NSF6A2 | 6 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Nissan | NSF8A | 8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Nissan | NSF9.8A | 9.8 | 4-Stroke | 3H6-04000-7 | Supersedes earlier -0 through -6 versions |
| Brand | Rated HP | Stroke | OEM Part No. | Notes |
|---|---|---|---|---|
| Mercury | 4 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
| Mercury | 5 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
| Mercury | 6 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
| Mariner | 4 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
| Mariner | 5 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
| Mariner | 6 | 4-Stroke | 803529T06 | Also replaces 803529T1, 803529T02, 803529T03 |
Technical Specifications
| Specification | Value |
|---|---|
| Product Type | Fuel Pump Assembly |
| Installation | Direct OEM Replacement |
| Fuel Type | Gasoline |
| Connection | Two hose barbs (inlet/outlet) |
| Housing Material | Alloy |
| Housing Color | Silver/Metallic with black top |
| Fitting Type | Hose barb connections |
| Warranty | Varies by retailer (typically 1-year against manufacturing defects) |
| Other Technical Attributes | Production Standard: ISO9002 certified factory |
Package Contents
- 1 x Fuel Pump Assembly (Replaces 3H6-04000-7 / 803529T06)
Installation Guide
- Safety First: Disconnect the battery and ensure the engine is cool. Work in a well-ventilated area away from sparks or open flames.
- Locate Fuel Pump: Identify the existing fuel pump on the engine block.
- Prevent Spills: Place a rag or container under the fuel pump and clamp the fuel lines on both sides to minimize fuel leakage.
- Disconnect Lines: Carefully disconnect the inlet and outlet fuel hoses from the pump. Note their orientation.
- Remove Old Pump: Unbolt the mounting hardware securing the old pump and remove it from the engine.
- Verify Fitment: Before installing, compare the new pump with your old one to ensure the fittings and mounting points match perfectly.
- Install New Pump: Mount the new fuel pump onto the engine and tighten the bolts to the manufacturer's recommended torque.
- Reconnect Lines: Attach the fuel inlet and outlet hoses to the correct ports on the new pump and secure the clamps.
- Final Checks: Remove the clamps from the fuel lines. Reconnect the battery.
- Prime and Test: Prime the fuel system according to your engine's manual. Start the engine and carefully inspect the pump and connections for any leaks.
Troubleshooting & FAQ
- How do I confirm this fits my engine?
- The best way is to match your original part number to the numbers in our Part Number Cross-Reference table. You can also check your engine model against the compatibility lists. If you're still unsure, inspect the product photos to visually match them with your existing part.
- My original part number is 3H6-04000-3. Will this part work?
- Yes. This fuel pump, 3H6-04000-7, is the direct supersession for all previous versions from 3H6-04000-0 through 3H6-04000-6. It will fit and function correctly.
- What are the common signs of a failing fuel pump?
- Symptoms of a bad fuel pump include difficulty starting the engine, stalling at low speeds, rough idling, engine sputtering at high speeds, or a noticeable loss of power. A visual inspection may also reveal cracks or fuel leaks on the pump housing.
- OEM vs. Aftermarket?
- 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.
- How fast do you ship and how much does it cost?
- 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.
- What is your warranty and return policy?
- 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.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.8 ★★★★★
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Product Reviews
★★★★★ 5
So sweet
Format: Kindle
It’s so unexpectedly sweet that it sneaks up on you. Each character is so unique and charming. I love the openness and honesty among their pack. It really blows me away how wonderful this omegaverse trope plays out.
I received a free copy of this book and am voluntarily leaving a review.
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Reviewed in the United States on March 21, 2026
★★★★★ 2
Needs editing
Format: Kindle
Cute storyline and promising characters, but the lack of editing is painful to read. I would love to read an edited version.
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Reviewed in the United States on April 10, 2025
★★★★★ 5
Good start to a series
Format: Kindle
I delayed reading the series for reasons I don’t remember. But my TBR list is huge so I thought I’d take a shot of this and I was pleasantly surprised. I didn’t think the blurb about it was anything special. But it was a very good book. It took some interesting twists and turns. I am so glad the second book is already out. Because I would not have waited patiently. Very slow burn but good storyline. 🔥🔥/5
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Reviewed in the United States on January 3, 2025
★★★★★ 4
A good read
Format: Kindle
Multiple points of view. 3 Alpha men and an Omega male. She is a Beta in training for a new program placing betas in Alpha/Omega packs. Mila is only doing the program for the money to take care of her dad. She wasn't expecting to fall for a pack but when she sees this packs Omega she is done for. There is just something about him. His Alphas are good looking as well. Too bad she is hiding a secret and their government is acting shady. I liked it and can't wait to see where their story goes.
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Reviewed in the United States on November 14, 2023
★★★★★ 3
Slightly repetitive but I did love some things
Format: Kindle
I love this type of story. And omegaverse is one of my all time favorite genres. But there are a few things that pulled me out of my enjoyment while I was reading. It was repetitive at times as well as struggled with telling not showing. So we didn’t always feel like we were experiencing things with the main character. There were also some plot holes but they may still be answered in part 2.
Now this isn’t to be said I didn’t enjoy parts of the story. I loved the almost instant love between Mila and Oliver. And how he started changing around her.
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Reviewed in the United States on February 15, 2024