MARINEPARTSDISTRIBUTORS 78-189A1 Fuel Pump Hunter 3B4-13907-11-00
fits model: Efi, Eps, 550, 700, 4wd, Grizzly. make: Yamaha.
( Brand: Marinepartsdistributors ), ( Manufacturer Part Number: 78-189A1 ), ( Part Type: Fuel Pump ), ( California Prop 65 Warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov ), ( Country Of Origin: Taiwan ), ( Oem Interchange Part Numbers1: 3b4-13907-00-00 ), ( Oem Interchange Part Numbers2: 3b4-13907-10-00 ), ( Oem Interchange Part Numbers3: 3b4-13907-11-00 ), ( Oem Interchange Part Numbers4: 3b4-13907-12-00 ), ( Oem Interchange Part Numbers5: 3b4-13907-13-00 ), ( Source: Aftermarket )
Review MARINEPARTSDISTRIBUTORS Fuel Pump Yamaha Hunter fits GRIZZLY EFI EPS 550 700 4WD
The **Yamaha GRIZZLY 550/700 4WD EFI Fuel Pump (Part #78-189A1, OEM #3B4-13907-11-00)** is a high-performance, electronically controlled component designed to deliver precise fuel delivery to the engine s intake system, ensuring optimal power, efficiency, and reliability across Yamaha s rugged 4WD off-road and utility vehicles. Engineered to meet the demands of modern EFI (Electronic Fuel Injection) systems, this fuel pump is a critical component in maintaining consistent throttle response, smooth acceleration, and peak engine performance especially under heavy loads, steep climbs, or prolonged use in challenging terrains. Constructed with Yamaha s engineering precision, the pump features a robust, sealed design that resists contamination from dust, debris, and moisture, making it ideal for off-road adventures where environmental conditions can be harsh. Its compact yet durable housing houses a high-efficiency electric motor paired with a precision-crafted impeller, which works in tandem with the vehicle s ECU (Engine Control Unit) to regulate fuel pressure dynamically, adapting to varying engine demands. This ensures not only improved fuel economy but also reduced emissions and extended engine longevity by preventing fuel starvation or over-fueling scenarios. Whether deployed in the GRIZZLY 550 s compact yet powerful engine or the larger displacement 700 s robust powerplant, this fuel pump is engineered to handle the demands of Yamaha s advanced EFI system, providing seamless operation whether you re navigating rocky trails, towing heavy loads, or cruising on paved roads. Built to Yamaha s exacting standards, this OEM replacement part is a direct-fit solution, ensuring compatibility with the original vehicle s fuel delivery architecture while maintaining the same level of performance and durability as the factory unit. For enthusiasts and professionals who demand reliability in their off-road equipment, this fuel pump is an essential upgrade or replacement option, guaranteeing that the GRIZZLY s engine continues to perform at its best, season after season.
### **Pros and Cons of buying a Yamaha GRIZZLY 550/700 4WD EPS Hunter Fuel Pump (Part #78-189A1-EFI, 3B4-13907-11-00)**
#### **Pros**
1. **OEM Compatibility** This is a genuine Yamaha fuel pump designed specifically for the GRIZZLY 550/700 EPS (Electric Power Steering) models. It ensures proper fitment, performance, and compatibility with the vehicle s EFI (Electronic Fuel Injection) system, reducing the risk of electrical or fuel delivery issues.
2. **Reliability** Yamaha s OEM components are built to meet strict quality standards, offering better durability compared to aftermarket alternatives. A well-functioning fuel pump is critical for consistent engine performance, especially in off-road and heavy-duty applications.
3. **Prevents Fuel Starvation** A failing fuel pump can cause stalling, poor acceleration, or complete engine failure, particularly under load. Replacing it proactively avoids costly breakdowns during critical moments, such as towing or rough-terrain driving.
4. **Supports EPS System Stability** While not directly related to fuel delivery, maintaining OEM components (including the fuel pump) helps ensure the EPS system operates smoothly, improving steering responsiveness a key feature for the GRIZZLY s off-road capabilities.
5. **Easier Installation** As an OEM part, it is designed to integrate seamlessly with the vehicle s wiring and fuel system. This reduces the complexity of installation compared to aftermarket parts that may require additional modifications.
6. **Warranty Coverage** Purchasing from Yamaha or an authorized dealer may include a warranty, providing peace of mind against defects in materials or workmanship.
7. **Future-Proofing** If you plan to keep the GRIZZLY long-term, using OEM parts ensures compatibility with potential future modifications or repairs, avoiding potential conflicts with non-standard components.
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#### **Cons**
1. **Higher Cost** OEM parts are typically more expensive than aftermarket alternatives. The price of this fuel pump may range significantly higher than generic or third-party replacements, which could be a deterrent for budget-conscious buyers.
2. **Limited Availability** Depending on the region, OEM Yamaha parts may not always be readily available in local stores. Purchasing online from authorized dealers might involve shipping delays or higher logistics costs.
3. **Potential Overkill for Minor Issues** If the fuel pump failure is due to a minor issue (e.g., clogged fuel filter or weak fuel pressure regulator), replacing the entire pump may be more expensive than diagnosing and addressing the root cause. A professional inspection could help determine if the pump is truly faulty or if another component is at fault.
4. **Installation Complexity** While the pump itself is straightforward to replace, the process may require disconnecting fuel lines, electrical connections, and potentially draining some fuel. Those unfamiliar with automotive work may need professional assistance, adding labor costs.
5. **Environmental and Safety Considerations** Fuel pumps deal with pressurized fuel, which poses a fire or spill risk during installation or removal. Proper precautions (e.g., using a fuel stabilizer, working in a ventilated area) are necessary, and improper handling could lead to accidents.
6. **Mixed Reviews on Longevity** Some owners report that OEM fuel pumps in Yamaha UTVs may wear out prematurely, especially in extreme conditions (e.g., frequent deep water crossings, heavy loads, or high temperatures). This could lead to recurring replacement costs over time.
7. **Aftermarket Alternatives May Suffice** For users who prioritize cost savings, aftermarket fuel pumps (e.g., from brands like **TorqueStream, Walbro, or Spectre**) often perform comparably and may offer extended warranties or better value for money. However, quality varies, so research is essential to avoid inferior products.
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### **Conclusion**
The **Yamaha GRIZZLY 550/700 4WD EPS Hunter Fuel Pump (78-189A1-EFI, 3B4-13907-11-00)** is a reliable, high-quality OEM component that ensures optimal fuel delivery and engine performance. Its advantages such as guaranteed compatibility, durability, and support for the EPS system make it an ideal choice for owners who prioritize long-term reliability and seamless integration with their vehicle. However, the higher cost and potential overkill for minor issues may be drawbacks for some buyers.
For those experiencing **fuel-related symptoms** (e.g., sputtering, weak acceleration, or engine stalling), replacing the pump is a prudent investment to prevent further damage. If budget is a concern, a **professional diagnosis** to confirm the pump s failure (rather than assuming it s the culprit) could save money. Additionally, exploring **high-quality aftermarket alternatives** with strong warranties may offer a cost-effective compromise without sacrificing performance.
### **Recommendation**
- **Buy the OEM pump if:**- You value peace of mind and OEM reliability.
- You re experiencing clear fuel pump failure symptoms (e.g., engine not starting, intermittent power loss).
- You plan to keep the GRIZZLY long-term and want to avoid compatibility issues with future modifications.
- You re comfortable paying a premium for genuine Yamaha parts.
- **Consider an aftermarket alternative if:**- You re on a tight budget and have researched reputable brands (e.g., **TorqueStream, Walbro, or Spectre**) with good reviews and warranties.
- You suspect another component (e.g., fuel filter, pressure regulator) may be the issue, and a diagnostic test confirms the pump is fine.
- You re confident in your ability to install the part correctly and want to avoid unnecessary expenses.
- **Before purchasing:**- **Verify symptoms:** Rule out other potential causes (e.g., clogged fuel lines, weak battery, or sensor issues) with a diagnostic scan or professional inspection.
- **Check for deals:** Look for discounts from Yamaha dealers, online marketplaces, or used parts suppliers (ensure the part is in good condition).
- **Compare warranties:** If opting for aftermarket, prioritize brands with **long warranties (e.g., 2 years)** to mitigate risk.
Ultimately, the **OEM pump is the safest choice for long-term reliability**, while **aftermarket options can be viable if thoroughly vetted**. Always prioritize quality and proper installation to maximize the lifespan of your GRIZZLY s fuel system.
Details:
OEM PART NUMBERS: Yamaha: 3B4-13907-11- 3B4-13907-12- 3B4-13907-00- 3B4-13907-10- 3B4-13907-13- B16-13907-00- B16-13907-01- B16-13907-02- B16-13907-03- SPECIFICATIONS: Product: EFI Fuel Pump Assembly, Style: In-Tank Module, Output: Specifications, Operating voltage : 12V, Includes: Pump, Strainer, Regulator, Product Notice. Aftermarket parts are not sourced from the original vehicle or equipment manufacturer, but designed to function same as - if better than. All parts sold are new. EFI Fuel Pump Yamaha Grizzly 550 700 4WD EPS Hunter 3B4-13907-11-00: Replaces Part Numbers Specifications.
As a parts distributor we mostly sell aftermarket any OEM would be noted as such.
specifications fuepumintak:
- for models: Efi, Eps, 550, 700, 4wd, Grizzly
- for makes: Yamaha
- brand: Marinepartsdistributors
- mpn: 78-189a1
- part type: Fuel Pump
- california prop 65 warning: This Product May Expose You To Chemicals Which Are Known To The State Of California To Cause Cancer And Birth Defects Or Other Reproductive Harm. For More Information Go To Www.p65warnings.ca.gov
- country of origin: Taiwan
- oem interchange part numbers1: 3b4-13907-00-00
- oem interchange part numbers2: 3b4-13907-10-00
- oem interchange part numbers3: 3b4-13907-11-00
- oem interchange part numbers4: 3b4-13907-12-00
- oem interchange part numbers5: 3b4-13907-13-00
- source: Aftermarket
returns fuepumintak:
- time: 30 Days
- policy: Returns Accepted
- paid by: Seller
general fuepumintak:
- condition: New
- ATV, Side-by-Side UTV Parts Accessories > Air Intake Fuel Delivery > Fuel Pumps Sending Units
shipping fuepumintak:
- type: Fixed
- service: Economy, Standard, Expedited, Overnight
- class: Economy, Standard, Expedited, One-day
- cost: $0.00
- transit: 3-9 Days
payments fuepumintak:
- wallet: Apple-pay
- other
- credit card: Discover
seller fuepumintak:
- # reviews: 21850
- city: Deerfield Beach, Florida
- rating: 98.7%
offer fuepumintak:
- sold: 0
- availability: In Stock
- options: Ship-to-home
- started: March 4, 2026
- quantity: 7
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