SKU: 65140600399

Fuel Pump – Fits Mercury Marine 4-6 HP & Tohatsu Nissan 4-9.8 HP (Replaces 803529T01, 803529T02, 803529T06)

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Description

Fuel Pump – Fits Mercury Marine 4-6 HP & Tohatsu Nissan 4-9.8 HP (Replaces 803529T01, 803529T02, 803529T06)Fuel Pump Fits Mercury Marine 4 6 HP & Tohatsu Nissan 4 9. 8 HP This aftermarket fuel pump is designed for a precise fit on specific Mercury Marine 4 6 HP and Tohatsu Nissan 4 9. 8 HP 4 Stroke outboard engines. It serves as a direct replacement component, restoring reliable fuel delivery for optimal engine performance. This unit directly replaces Mercury part numbers 803529T, 803529T01, 803529T02, 803529T03, and 803529T06, as well as Tohatsu Nissan

Fuel Pump – Fits Mercury Marine 4-6 HP & Tohatsu Nissan 4-9.8 HP

This aftermarket fuel pump is designed for a precise fit on specific Mercury Marine 4-6 HP and Tohatsu/Nissan 4-9.8 HP 4-Stroke outboard engines. It serves as a direct replacement component, restoring reliable fuel delivery for optimal engine performance.

This unit directly replaces Mercury part numbers 803529T, 803529T01, 803529T02, 803529T03, and 803529T06, as well as Tohatsu/Nissan part numbers 3H6-04000-0 through 3H6-04000-7.

  • Complete Kit: Includes one fuel pump, two clamps/clips, and one O-ring for a comprehensive installation.
  • Fuel Compatibility: Designed for use with Gasoline.
  • Installation Method: This is a mechanical pump that mounts to the transom and is activated by the engine's camshaft.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury 803529T, 803529T01, 803529T02, 803529T03, 803529T06
Tohatsu/Nissan 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7

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.

Confirm your engine model/year in the table below.

Brand Model Rated HP Stroke OEM Part No. Notes
Mercury 4 HP Carb 4 4-Stroke 803529T, 803529T01, 803529T02, 803529T03, 803529T06
Mercury 5 HP Carb 5 4-Stroke 803529T, 803529T01, 803529T02, 803529T03, 803529T06 Including 5 HP Carb JCI model
Mercury 6 HP Carb 6 4-Stroke 803529T, 803529T01, 803529T02, 803529T03, 803529T06
Tohatsu MFS4A2, MFS4B, MFS4C 4 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Nissan NSF4A2, NSF4B, NSF4C 4 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Tohatsu MFS5A2, MFS5B, MFS5C 5 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Nissan NSF5A2, NSF5B, NSF5C 5 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Tohatsu MFS6A2, MFS6B, MFS6C 6 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Nissan NSF6A2, NSF6B, NSF6C 6 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Tohatsu MFS8A2, MFS8A3 8 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Nissan NSF8A2, NSF8A3 8 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Tohatsu MFS9.8A2, MFS9.8A3 9.8 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7
Nissan NSF9.8A2, NSF9.8A3 9.8 4-Stroke 3H6-04000-0, 3H6-04000-1, 3H6-04000-2, 3H6-04000-3, 3H6-04000-4, 3H6-04000-5, 3H6-04000-6, 3H6-04000-7

Technical Specifications

Specification Value
Product Type Marine Outboard Fuel Pump
Installation Vehicle/Engine-specific fit
Fuel Type Gasoline
Connection Hose Barb Input, Screw Output
Housing Material Marine Grade Fuel Pump (exact material not specified)
Housing Color Silver/Metallic
Dimensions 114.5 × 91 × 62 mm (4.53 × 3.58 × 2.44 inches) [package dimensions]
Weight 0.18 kg (6.4 ounces)
Fitting Type Transom Mount
Thread Size 0.25 inches (connection size)
Other Technical Attributes Mechanical pump (activated by engine camshaft)

Package Contents

  • 1 x Fuel pump (803529T01/3H6-04000-1)
  • 2 x Clamps/clips (54-95395)
  • 1 x O-ring (25-803513)

Installation Guide

  1. Safety First: Disconnect the battery and work in a well-ventilated area. Ensure the engine is cool.
  2. Locate the Pump: Identify the existing fuel pump on the engine block.
  3. Disconnect Lines: Carefully disconnect the fuel inlet and outlet lines. Have rags ready to catch any spilled fuel.
  4. Remove Old Pump: Unbolt the old fuel pump from the engine. Note the orientation of the actuator arm.
  5. Clean Surface: Clean the mounting surface on the engine block to ensure a good seal with the new O-ring.
  6. Install New Pump: Place the new O-ring and install the new fuel pump, ensuring the actuator arm is correctly positioned against the camshaft.
  7. Secure Bolts: Tighten the mounting bolts to the manufacturer's recommended torque specifications.
  8. Reconnect Lines: Securely attach the fuel inlet and outlet hoses and clamps.
  9. Prime the System: Reconnect the battery. Use the primer bulb (if equipped) to fill the fuel system.
  10. Check for Leaks: Start the engine and carefully inspect for any fuel leaks around the pump and connections.

Troubleshooting & FAQ

Q: How do I confirm this fuel pump will fit my specific engine?

A: The best way is to match your existing part number to the ones listed in our cross-reference table. You can also check your engine's model and HP against our compatible models list. For Mercury owners, our Serial Number Guide can help you identify your engine details.

Q: What are the signs of a failing fuel pump?

A: Common symptoms include difficulty starting the engine, stalling at low speeds, engine hesitation or loss of power during acceleration, and sputtering at high speeds. A visible fuel leak from the pump body is also a clear sign of failure.

Q: Is this difficult to install myself?

A: This is a mechanical pump, and installation is straightforward for those with basic mechanical skills. However, as it involves the fuel system, we recommend professional installation if you are not completely comfortable with the process to ensure safety and proper function.

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.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. 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
SKU: 65140600399

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4.1 ★★★★★
Based on 12 reviews
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Product Reviews
J
Verified Purchase
Joshua Jordan
San Leandro, US
★★★★★ 5
It's simple, it works, & its price makes for a good deal
Size: Single, Style: Free-Standing
I needed a stand for a 27" VIZIO TV that had been wall-mounted for a few years, & (?) the original stand must've got the toss long ago... It's hard to say... I found this stand on Amazon priced right, plus it had a coupon attached to the listing. I scrolled down & I saw a "newer model" of the same product was available, so I was initially hesitant. But, looking at the product pictures, reading the description, & scanning through some of the reviews, then the same with the "newer model" — the only difference I could see was mostly aesthetic (it also appears to have a desk mount included, which wouldn't have worked for me regardless of its purpose—either for conversion to a desk stand-off mount, or to further secure the stand....?) Eventually, I just thought "....it's a stand with a VESA mount; how do you **** that up...?" And I really couldn't think of anything...even if the VESA bracket was milled not to spec (it is milled to spec), I could have still made it work....(?) So, I made the purchase, received it, & 9-10 screws later, the TV had a stand. & I'm guessing a much more versatile stand than the original. The bracket that attaches the stand to the VESA mount can lower or raise the TV quite a bit. Even in it's highest position, it's still retains its sturdiness & remains stable. The baseplate has a decent amount of weight, and its overall design is well balanced to favor stability (to a tolerance; e.g., an old CRT monitor just isn't going to work). The stand is literally 4 basic pieces—the VESA bracket, an articulating bracket, a metal tube, & a metal baseplate. If you have a standard phillips screwdriver, then the stand is easy to assemble. If you have any experience with TV mounts, or TV stands, then it assembles in less than 15 minutes. Given what you get for the price, the ease of assembly, the added versatility, if you need a stand for a screen within the manufacturer's specific tolerances, then I would absolutely recommend this stand.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 19, 2021
V
Verified Purchase
viplarry
Cuba, US
★★★★★ 5
Decent Monitor Stand with Some Assembly Required
Size: Single, Style: Free-Standing
This monitor stand works pretty well and is a good value for the price. It’s sturdy and adjustable, which makes it perfect for a variety of monitors, including my 32-inch curved Samsung. The assembly is straightforward if you have a Phillips screwdriver and something to tighten bolts, like a wrench. It’s solid once it’s put together and holds my monitor securely. The phone holder could use some improvement. It doesn't adjust to face me directly, which is a bit annoying. The stand itself is great for saving desk space and providing better ergonomics, but it can be a bit of a hassle to assemble if you’re not handy with tools. Overall, a good buy if you need a reliable monitor stand.
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Reviewed in the United States on October 25, 2024
S
Verified Purchase
sirav
Fort Morgan, US
★★★★★ 3
Works, Good product, but wouldn't recommend for specifically 3 27inch screens.
Size: Triple, Style: Free-Standing
I purchased this stand to have 3 27inch 2560x1440 monitors, with the side ones angled towards me in a typical 3-monitor setup often seen being used by racing or aviation simulator guys. This stand's arms for the two side monitors are not long enough to have said monitors angled more than 5 to 8 degrees meaning they are forced to be completely linear which is incredibly awkward to try to use because you can barely see or use the screen space on the far edges. 𝐖𝐢𝐭𝐡 𝐭𝐡𝐞𝐬𝐞 𝐬𝐢𝐳𝐞 𝐬𝐜𝐫𝐞𝐞𝐧𝐬, 𝐭𝐡𝐞 𝐨𝐧𝐥𝐲 𝐰𝐚𝐲 𝐭𝐨 𝐡𝐚𝐯𝐞 𝐞𝐯𝐞𝐧 𝐨𝐧𝐞 𝐚𝐭 𝐚𝐧 𝐚𝐝𝐞𝐪𝐮𝐚𝐭𝐞 𝐚𝐧𝐠𝐥𝐞 𝐟𝐨𝐫𝐜𝐞𝐬 𝐭𝐡𝐞 𝐨𝐭𝐡𝐞𝐫 𝐦𝐨𝐧𝐢𝐭𝐨𝐫 𝐭𝐨 𝐛𝐞 𝐢𝐧 𝐩𝐨𝐫𝐭𝐫𝐚𝐢𝐭 𝐦𝐨𝐝𝐞, 𝐤𝐢𝐧𝐝 𝐨𝐟 𝐦𝐞𝐬𝐬𝐢𝐧𝐠 𝐮𝐩 𝐭𝐡𝐞 𝐰𝐡𝐨𝐥𝐞 𝐩𝐨𝐢𝐧𝐭 𝐨𝐟 𝐛𝐮𝐲𝐢𝐧𝐠 𝐭𝐡𝐢𝐬. The product description should not say it can hold 3 27 inch screens because the amount of struggling I had to do to get it to be acceptable was ridiculous. The stand is... not heavy enough to safely hold monitors of this size either, and additional weight was required ( 2 10lb dumbbells in my case ) configuring the height of your monitors with this stand can be dangerous as well as they could fall down the central post so you have to be extremely careful, but, it is pretty easy other than that. It is a great option if you don't have a desk with an edge for typical stands ( I don't. ) You can place the stand anywhere, and you don't have to drill through your desk if you really don't want to. The cable clips are a very nice included bonus, and they sent me a replacement without any hassle when I totally effed up my first attempt at setup. But, I would have shopped harder and got something else if I knew all this prior all the same. Maybe even bought a gigantic curved screen instead.
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Reviewed in the United States on January 8, 2025
D
Verified Purchase
Dr. Dean
Fort Morgan, US
★★★★★ 5
Everyone likes the extra outlets and spacing!
Size: 6ft, Color: Yellow
I have a livestream desk shared by a team where we have lots of equipment. We were always running out of outlets and the team had nothing but praise when I installed this 16 outlet replacement. The spacing is perfect for a variety of bricks, plugs and adapters of all sizes. It's metal construction seems very durable and it's easily to mount it solidly to the wall with the wings at each end. The power cord is sufficiently beefy and lighted switch at one end a plus. Overall, we're very happy with its design, capability and value. The extra praise for doing a simple replacement was nice too!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 21, 2025
J
Verified Purchase
Joseph Espi
Chelsea, US
★★★★★ 5
Heavy-Duty Power for Any Workshop or Garage
Size: 6ft, Color: Yellow
I recently upgraded my workspace with the JUNNUJ 16-Outlet Heavy Duty Power Strip, and it has completely transformed how I manage tools and electronics in my garage. Why It Stands Out: Ample Outlets With 16 wide-spaced outlets, it accommodates bulky plugs, adapters, and chargers without blocking neighboring sockets. Perfect for workshops or garages where multiple tools run simultaneously. Durable Construction The full metal housing gives it an industrial-grade feel, and it can handle heavy-duty equipment without bending or warping. Unlike plastic strips, this one feels built to last. Safety First Equipped with surge protection and grounded outlets, it keeps both tools and electronics safe. I feel confident plugging in expensive power tools or charging devices without worrying about power spikes. Practical Length The long cord allows me to reach multiple corners of my garage without needing extension cords, reducing clutter and tripping hazards. Professional-Grade Design Wide-spaced, high-capacity, and metal-built — this is clearly designed for industrial or garage use, not just casual household tasks. It’s heavy-duty without being overcomplicated. Minor Considerations: It’s larger and heavier than standard power strips, so it needs a stable mounting spot or surface. Price is higher than a typical household strip, but for the durability and outlet capacity, it’s worth it. Bottom Line: The JUNNUJ 16-Outlet Heavy Duty Power Strip is a powerhouse for garages, workshops, or any space with multiple high-demand devices. Durable, safe, and highly practical, it’s a must-have for anyone who needs reliable industrial-grade power management.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 19, 2025

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