NISSAN 3H8-04000-1 Tohatsu Outboard Fuel Pump Ring Kit 734189487726 9.9 3H8-04000-0

( Manufacturer Part Number: 3H8-04000-1 ), ( Part Type: Fuel Ring Hp Pump ), ( UPC: 734189487726 ), ( Manufacturer Name: Shanghai Sierra-boat Parts Co., Ltd. ), ( Part Name Type: Nissan Tohatsu Outboard Motor Fuel Pump With O-ring ), ( Replacement Oem Number 1: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8-04000-1 ), ( Replacement Oem Number 2: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040001 ), ( Replacement Oem Number 3: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040001m ), ( Replacement Oem Number 4: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8-04000-0 ), ( Replacement Oem Number 5: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040000 ), ( Compatible With 1: Nissan Tohatsu Marine 4 Stroke 9.9 15 18 Hp Outboard Fuel Pump ), ( Compatible With 2: Nissan Tohatsu 4 Stroke 9.9 Hp Mfs 9.9b2 Mfs 9.9c Oil Fuel Pump ), ( Compatible With 3: Nissan Tohatsu 4str 15hp Mfs 15b2 Mfs 15c Outboard Oil Fuel Pump ), ( Compatible With 4: Nissan Tohatsu 4str 18hp Mfs 18b2 Mfs 18c Outboard Oil Fuel Pump ), ( Package Include Parts: 1pcs Outboard Fuel Pump, 1pcs O-ring, 2pcs Clips ), ( Replacement Oem Number 6: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040000m ), ( Package Weight: 251g ), ( Item Package Dimensions: 12 10 8.5 Cm ), ( Fuel Pump Brand: Jlm Marine )

Review NISSAN Aftermarket Tohatsu Outboard Fuel Pump O ring And Kit Stroke 9.9 Hp fits MARINE 2015–2018

The **Nissan-Tohatsu Outboard Fuel Pump O-Ring Kit (Part #734189487726)** is a precision-engineered replacement solution designed exclusively for marine applications, tailored to fit the fuel pump assemblies found in **Nissan-Mitsubishi 9.9 HP, 15 HP, and 18 HP outboard engines** from the 2018 and later model years. This high-quality kit is meticulously crafted to ensure a perfect seal between critical components, preventing fuel leaks, reducing wear on internal pump mechanisms, and maintaining optimal engine performance under demanding marine conditions. Constructed from **durable, heat-resistant nitrile rubber**, the o-rings within this kit are engineered to withstand the harsh environments of saltwater exposure, temperature fluctuations, and prolonged exposure to fuel and lubricants, all while delivering reliable, long-lasting functionality. The kit includes a **complete set of replacement o-rings**, including the primary fuel pump seal, gasket, and any auxiliary components required for a seamless installation, ensuring that mechanics and DIY enthusiasts can restore their outboard s fuel system with confidence. Whether used for routine maintenance or as part of a larger engine overhaul, this kit is an essential upgrade for preserving the efficiency and longevity of Nissan-Tohatsu outboards, helping to avoid costly fuel system failures and ensuring smooth, trouble-free operation for years of reliable performance on the water.

### Pros and Cons of buying a Nissan/Toihatsu Outboard Fuel Pump O-Ring Kit (Part #734189487726) for Marine Engines (9.9 HP, 15 HP, 18 HP)

1. **Compatibility** This kit is specifically designed for Nissan/Toihatsu outboard motors, ensuring a proper fit for engines in the 9.9 HP, 15 HP, and 18 HP range. Using the correct O-rings prevents leaks and ensures optimal performance.

2. **Prevents Fuel Leaks** Worn or damaged O-rings are a common cause of fuel leaks, which can lead to fuel wastage, potential fires, or engine damage. Replacing them as part of routine maintenance helps avoid these issues.

3. **Easy Installation** The kit typically includes all necessary O-rings (often two or three), making it a straightforward DIY replacement. No special tools are usually required beyond basic maintenance equipment.

4. **Cost-Effective** Compared to the potential cost of repairing fuel system damage caused by leaks, this kit is a relatively inexpensive preventive measure. It extends the life of the fuel pump and engine components.

5. **Improves Engine Reliability** A properly sealed fuel pump ensures consistent fuel flow, reducing the risk of stalling, poor performance, or long-term engine wear.

6. **Part of Routine Maintenance** Replacing O-rings is a recommended part of regular outboard motor upkeep, especially for older engines or those with high operating hours. This helps maintain efficiency and resale value.

7. **Available from Trusted Sources** If purchased from reputable marine suppliers (e.g., Sea-Doo, Yamaha, or specialty marine parts stores), the kit is likely to be high-quality and genuine, reducing the risk of counterfeit or low-grade parts.

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1. **Potential for Counterfeit Parts** If bought from untrusted online marketplaces (e.g., generic e-commerce sites without brand verification), there s a risk of receiving fake or substandard O-rings. These may fail prematurely or not fit correctly.

2. **Limited Lifespan** Even high-quality O-rings degrade over time due to exposure to fuel, heat, and vibration. While they last longer than cheap alternatives, they still require periodic replacement (typically every 100 200 hours of use or as part of annual maintenance).

3. **Mixed Reviews on Durability** Some users report that O-ring kits from certain suppliers (even genuine ones) wear out quickly, especially in harsh conditions (e.g., saltwater exposure). This may require more frequent replacements.

4. **Installation Challenges** While generally simple, improper handling (e.g., stretching or misaligning the O-rings) can lead to leaks. Those unfamiliar with outboard repairs may struggle without clear instructions or a service manual.

5. **Price Sensitivity** For budget-conscious buyers, the cost of the kit ( $10 $20) may seem minor, but if purchased frequently (due to frequent failures), it adds up. Some opt for universal O-ring kits instead, though compatibility isn t guaranteed.

6. **Alternative Solutions Exist** For engines with persistent fuel pump issues, some users opt for upgrading to a new fuel pump assembly instead of repeatedly replacing O-rings, which can be more cost-effective in the long run.

7. **Environmental Impact** Disposing of old O-rings improperly (e.g., throwing them in the trash) can contribute to pollution. Buyers should ensure proper disposal or recycling if available.

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The Nissan/Toihatsu outboard fuel pump O-ring kit (734189487726) is a practical and necessary part for maintaining 9.9 HP, 15 HP, and 18 HP marine engines. Its primary advantage lies in preventing fuel leaks and ensuring reliable engine performance, which outweighs the minor drawbacks. However, the risk of counterfeit parts and the need for periodic replacement are important considerations.

For most boat owners, this kit is a **worthwhile investment** when purchased from a trusted supplier. It s a small but critical component of routine maintenance that can save significant trouble (and expense) down the line. If budget is a concern, verifying the seller s reputation and comparing prices across reputable marine parts retailers is advisable.

- **Buy from authorized marine dealers or well-reviewed online stores** (e.g., Amazon, Sea-Doo parts, or Yamaha marine centers) to ensure authenticity.

- **Replace O-rings as part of your annual outboard maintenance** schedule, especially if your engine operates in saltwater or high-use conditions.

- **Follow the manufacturer s guidelines** for installation to avoid leaks or damage.

- **Consider upgrading to a new fuel pump** if leaks persist despite O-ring replacements, as this may indicate deeper issues.

- **Store spare O-rings** in a dry place to extend their shelf life for future use.

In summary, this kit is a **reliable and cost-effective solution** for preventing fuel system failures in compatible Nissan/Toihatsu outboards, provided it is sourced and installed correctly.

Details:

5.Pressure Rating 3.Mounting Bolt Pattern hole spacing/alignment. 3.Year of Manufacture designs may vary by year. Johnson 25HP or Honda 50HP.

20 GPH, 30 GPH. 1.Fuel Flow Rate JLM Marine Brand package includes. Bracket-mounted.

2.Difficulty starting or sudden power loss. Same to the picture shown. Nissan Tohatsu Marine 4 Stroke 9.9 15 18 HP Outboard Fuel Pump Assembly, MFS 9.9B2 9.9C Oil Pump, 15B2 15C 18B2 18C. 1.Engine sputtering at high PMS.

This Marine Engine Fuel Pump Replacement for Brand Outboard OEM Number. JLM MARINE is an engine components and external equipment manufacturer. Send your engine details we ll guide you to the right part.

3.Fuel leaks around the pump housing. 2.Pump mounting bolt-on vs. 2.Original Fuel Pump Part Number match numbers on your old pump. 1.Engine model HP.

Nissan Tohatsu Outboard Marine Motor Fuel Pump 3H8-04000-1 3H8040001 3H8040001M, 3H8-04000-0 3H8040000 3H8040000M. Minor variations can lead to fuel delivery issues or leaks. This Fuel Pump fits Nissan Tohatsu Marine Outboard Motor model's Specifications. 4.Inlet/Outlet Port Size thread type and diameter.

4.Overheating due to lean fuel mixture.

specifications ouboaen:

• for models: Marine
• for makes: Nissan
• for years: 2015-2018
• mpn: 3h8-04000-1
• part type: Fuel Ring Hp Pump
• upc: 734189487726
• manufacturer name: Shanghai Sierra-boat Parts Co., Ltd.
• part name type: Nissan Tohatsu Outboard Motor Fuel Pump With O-ring
• replacement oem number 1: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8-04000-1
• replacement oem number 2: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040001
• replacement oem number 3: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040001m
• replacement oem number 4: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8-04000-0
• replacement oem number 5: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040000
• compatible with 1: Nissan Tohatsu Marine 4 Stroke 9.9 15 18 Hp Outboard Fuel Pump
• compatible with 2: Nissan Tohatsu 4 Stroke 9.9 Hp Mfs 9.9b2 Mfs 9.9c Oil Fuel Pump
• compatible with 3: Nissan Tohatsu 4str 15hp Mfs 15b2 Mfs 15c Outboard Oil Fuel Pump
• compatible with 4: Nissan Tohatsu 4str 18hp Mfs 18b2 Mfs 18c Outboard Oil Fuel Pump
• package include parts: 1pcs Outboard Fuel Pump, 1pcs O-ring, 2pcs Clips
• replacement oem number 6: Nissan Tohatsu Outboard Marine Motor Fuel Pump 3h8040000m
• package weight: 251g
• item package dimensions: 12 10 8.5 Cm
• fuel pump brand: Jlm Marine

seller ouboaen:

• # reviews: 932
• rating: 100.0%
• city: Hebron, Kentucky

offer ouboaen:

• options: Ship-to-home
• availability: In Stock
• started: January 31, 2026
• sold: 0
• quantity: 8
• best offers: True

shipping ouboaen:

• cost: $0.00
• service: Standard, UPS Ground, Expedited
• carrier: UPS
• type: Fixed
• class: Standard, Expedited
• transit: 4-9 Days

general ouboaen:

• Boat Parts > Outboard Engines Components > Intake Fuel Systems
• condition: New

payments ouboaen:

• wallet: Apple-pay
• credit card: Discover
• other

returns ouboaen:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

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