MERCURY 43-19277 Outboard Oil Pump Gear 745061126909 40HP

( Manufacturer Part Number: 43-19277 ), ( Part Type: Oil Pump Gear ), ( Size: 40hp ), ( Color: Gray ), ( Country Of Origin: United States ), ( UPC: 745061126909 )

Review MERCURY 40hp Outboard Oil Pump Driven Gear fits MARINER MAGNUM 1991–2010

The **Mercury 43-19277 1997 Mariner Magnum 40HP Outboard Oil Pump Gear** is a precision-engineered, high-performance component designed exclusively for the iconic **Mercury Mariner Magnum 40HP outboard motor** from the late 1990s. This critical internal part plays a vital role in maintaining optimal lubrication within the engine s crankcase, ensuring smooth operation, extended component life, and reliable performance under demanding conditions. Crafted from durable, heat-resistant materials, the oil pump gear is engineered to withstand the high pressures and temperatures generated during operation, preventing premature wear on bearings, shafts, and other critical moving parts. Its unique design incorporates a **gerotor-style internal gear system**, which efficiently circulates oil throughout the engine s lubrication network, reducing friction and heat buildup while minimizing oil consumption. This gear is a direct-fit replacement for the original equipment manufacturer (OEM) part, guaranteeing seamless integration with the **1997 Mariner Magnum 40HP s** internal oil delivery system. Whether used in recreational boating, fishing, or light-duty marine applications, this component is essential for preserving the engine s longevity and performance, making it a must-have replacement for owners seeking to restore or maintain their Mercury outboard s reliability. Built to meet Mercury s stringent quality standards, this gear is a testament to the brand s commitment to durability and precision, ensuring that your outboard continues to deliver the power and efficiency it was designed for.

**Pros and Cons of buying a Mercury 43-19277 (1997 Mariner Magnum 40HP Outboard Oil Pump Gear)**

1. **Compatibility** This part is specifically designed for the 1997 Mercury Mariner Magnum 40HP outboard, ensuring a precise fit and reducing the risk of installation issues.

2. **Reliability** Mercury Marine is a well-known brand with a reputation for durable marine components, and this gear is part of their standard replacement parts lineup.

3. **Preventative Maintenance** Replacing a worn or failing oil pump gear can prevent engine damage, extend the life of the outboard, and avoid costly repairs down the line.

4. **Ease of Installation** As an individual component, it is relatively straightforward to replace compared to a full engine overhaul, requiring only basic tools and mechanical knowledge.

5. **Cost-Effective** Compared to the potential cost of engine failure or major repairs, this part is relatively inexpensive, making it a wise investment for proactive maintenance.

6. **Performance Improvement** A properly functioning oil pump ensures consistent lubrication, reducing friction, heat, and wear on internal engine components, which can improve overall performance.

7. **Warranty Coverage** If purchased from an authorized dealer or reputable seller, the part may come with a warranty, providing added peace of mind.

1. **Age of the Part** The 1997 model year suggests that this part may be older, and while it is still likely functional, it may not benefit from the latest design improvements or materials used in newer models.

2. **Availability of Alternatives** Some aftermarket or newer OEM parts may offer enhanced durability or efficiency, though they may come at a higher cost.

3. **Installation Complexity** While the part itself is simple, removing the old gear may require disassembling parts of the outboard, which could be challenging for inexperienced DIYers. Professional installation may be necessary.

4. **Potential for Counterfeit Parts** Purchasing from untrusted sellers increases the risk of receiving a counterfeit or low-quality replica, which could fail prematurely or damage the engine.

5. **Limited Longevity** Like all mechanical parts, this gear will eventually wear out again, requiring future replacement. It is not a permanent fix but rather a maintenance item.

6. **Compatibility Concerns** While this part is designed for the 1997 Mariner Magnum 40HP, slight variations in later or earlier models could pose compatibility issues, so verification is essential.

7. **Labor Costs** If professional installation is required, labor fees could add to the overall expense, though this is often outweighed by the benefits of proper maintenance.

The Mercury 43-19277 oil pump gear for the 1997 Mariner Magnum 40HP outboard is a practical and cost-effective choice for owners looking to maintain or restore their engine s performance. The part s compatibility, reliability, and preventative benefits outweigh the minor drawbacks, particularly for those who prioritize proactive maintenance. However, buyers should ensure they source the part from a trusted supplier to avoid counterfeit or substandard replacements. Additionally, while the part itself is relatively simple, those without mechanical experience may benefit from professional installation to avoid complications.

If you are experiencing symptoms such as oil pressure warnings, unusual engine noise, or reduced performance in your 1997 Mercury Mariner Magnum 40HP, replacing the oil pump gear is a sound preventive measure. Purchase the part from an authorized Mercury dealer, a reputable marine parts supplier, or a trusted online retailer with verified seller ratings. If you are unsure about installation, consult a marine mechanic to ensure proper fitting and function. Regularly checking oil levels and pressure afterward will help confirm that the replacement is effective. Overall, this is a worthwhile investment for maintaining the health and longevity of your outboard engine.

Details:

Contact a dealer to verify this is the correct part fit your machine. PART NUMBER: 43-19277. You get what you see in the pictures so please look closely at all of pictures, for wear and tear to make sure that this is exactly want before decide purchase.: 1997 Mariner Magnum 40HP Outboard Oil Pump Driven Gear 43-19277.

Condition: Preowned.

part #: 4319277 prices

• $10.00-$19.99

specifications ouboaen:

• for models: Mariner, Magnum
• for makes: Mercury
• for years: 1991-2010
• mpn: 43-19277
• part type: Oil Pump Gear
• size: 40hp
• color: Gray
• country of origin: United States
• upc: 745061126909

returns ouboaen:

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

shipping ouboaen:

• type: Fixed
• cost: $0.00
• class: Standard
• service: USPS First Class
• transit: 4-8 Days
• carrier: USPS

payments ouboaen:

• other
• wallet: Paypal
• credit card: Mastercard
• cash

seller ouboaen:

• rating: 99.6%
• city: Lake City, Michigan
• # reviews: 2609

offer ouboaen:

• availability: In Stock
• options: Ship-to-home
• quantity: 1
• started: March 19, 2026
• sold: 0

general ouboaen:

• condition: Used
• Boat Parts > Outboard Engines Components > Other

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