MERCURY 23-99299 Outboard Spacer

( Manufacturer Part Number: 23-99299 ), ( Part Type: Spacer )

Review MERCURY Outboard Spacer New Free Shipping fits MERCRUISER

The **Mercury 23-99299 Outboard Mercruiser Spacer** is a precision-engineered, high-performance component designed exclusively for Mercury Marine s outboard motor lineups, specifically tailored to enhance compatibility and functionality within the Mercruiser inboard/outboard (I/O) propulsion systems. This spacer serves as a critical link between the outboard motor s lower unit and the stern drive unit of a Mercruiser inboard engine, ensuring seamless integration, optimal power transfer, and reliable operation across a variety of marine applications. Crafted from high-grade, corrosion-resistant materials, the spacer is engineered to withstand the demanding conditions of saltwater environments, extreme temperatures, and the constant mechanical stress of propulsion systems. Its robust construction minimizes vibration and wear, contributing to the longevity of both the outboard motor and the inboard engine while maintaining the precise alignment required for efficient performance. Whether installed on a luxury yacht, a high-speed performance boat, or a commercial vessel, this spacer plays a pivotal role in preserving the integrity of the propulsion system, reducing the risk of premature failure, and ensuring smooth, responsive handling. Ideal for marine professionals and enthusiasts seeking to upgrade or repair their Mercury Mercruiser setups, this component exemplifies Mercury Marine s commitment to innovation and durability, delivering a solution that balances strength, precision, and reliability in every application.

### **Pros and Cons of Buying a Mercury 23-99299 Outboard (Mercruiser Spacer)**

1. **Reliability and Durability** Mercury outboards are known for their robust construction and long-lasting performance, especially in the 200 300 HP range. The 99299 model is part of the proven 90 series, which has a strong reputation for durability in both freshwater and saltwater applications.

2. **Power and Performance** This outboard delivers strong horsepower (typically 200 250 HP, depending on configuration) with good acceleration and top-end speed, making it suitable for mid-sized boats (20 25 feet). It provides a good balance of power and efficiency for cruising, fishing, or light planing.

3. **Mercruiser Compatibility** The "spacer" designation indicates it is designed to fit Mercury s Mercruiser inboard/outboard (I/O) systems, which are widely used in production boats. This means it integrates smoothly with Mercruiser transmissions, steering systems, and other components, reducing compatibility issues.

4. **Fuel Efficiency** Compared to larger outboards, the 99299 offers reasonable fuel economy for its power class, making it cost-effective for extended trips. Mercury s fuel-injected models (if applicable) further improve efficiency and reduce emissions.

5. **Aftermarket Support** Mercury outboards have a vast aftermarket, including parts, upgrades (e.g., exhaust systems, propellers, performance chips), and service centers. This makes maintenance and modifications easier and more affordable.

6. **Resale Value** Mercury outboards, especially well-maintained models from this era, hold their value reasonably well compared to some competitors. The 90 series is still in demand in the used market.

7. **Versatility** The 99299 can be used in various applications, from fishing boats to cruisers, thanks to its adjustable trim and tilt capabilities. It also works well in both freshwater and saltwater environments with proper maintenance.

8. **Lower Operating Costs** Compared to larger outboards, the 99299 has relatively lower fuel and maintenance costs, making it a practical choice for recreational boaters who don t need extreme performance.

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1. **Age and Wear** The 99299 is an older model (likely from the late 1990s to early 2000s). While well-built, it may require more frequent maintenance, especially if it hasn t been properly serviced. Components like seals, gaskets, and bearings may need replacement over time.

2. **Fuel Injection Limitations** Earlier models in this series may lack modern fuel injection systems (common in newer Mercuries), which can lead to slightly lower efficiency and more frequent tune-ups. If the outboard is carbureted, it may be less reliable in varying conditions.

3. **Noise and Vibration** Older Mercury outboards can be noisier and vibrate more than newer models, which may affect comfort, especially in enclosed cabins. This can also indicate wear in the lower unit or engine mounts.

4. **Electronics and Diagnostics** Older Mercuries may lack modern diagnostic tools, making troubleshooting harder. Some electronic components (e.g., ignition systems) may be less reliable than in newer models.

5. **Environmental Regulations** If used in saltwater or heavily regulated areas, older outboards may not meet current emissions standards, potentially requiring modifications or upgrades to comply with local laws.

6. **Propeller Compatibility** The stock propeller may not be optimal for the boat s specific use (e.g., fishing vs. cruising). Upgrading to a more efficient propeller could improve performance but may require additional investment.

7. **Parts Availability** While parts are still available, some specialized components (e.g., rare seals or gaskets) may be harder to find than in newer models. Stockpiling spare parts is advisable.

8. **Resale Depreciation** Older outboards depreciate faster than newer models. If you plan to sell later, the value may not recover as much as a modern equivalent.

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The Mercury 23-99299 outboard is a solid, reliable choice for boaters who need a mid-sized, power-efficient outboard with Mercruiser compatibility. Its strengths lie in durability, performance, and aftermarket support, making it a practical option for cruising, fishing, or general boating. However, its age means it will require more maintenance attention, and some modern conveniences (e.g., advanced diagnostics, fuel efficiency) are lacking compared to newer models.

If you re buying this outboard for a well-maintained boat with a history of proper servicing, it can be a cost-effective and dependable powerplant. However, if you re looking for the latest technology, lower maintenance, or better fuel efficiency, a newer Mercury outboard (e.g., the 90 series from the 2010s onward) may be a better long-term investment.

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- You need a reliable, mid-power outboard for a Mercruiser-compatible boat.

- You re prepared for regular maintenance and potential upgrades (e.g., new seals, gaskets, or electronics).

- You re on a budget and can find a well-documented, low-hour example with a service history.

- You plan to use it in a controlled environment (e.g., freshwater or lightly saltwater) where it can be properly winterized and maintained.

- You want a newer outboard with better fuel efficiency, quieter operation, and advanced diagnostics.

- You re in a highly regulated area where emissions compliance is a concern.

- You prefer lower long-term maintenance costs and higher resale value.

**Final Verdict:** The Mercury 99299 is a capable and proven outboard, but its age means it s best suited for experienced boaters who can handle its maintenance needs. For most buyers, a newer Mercury outboard (e.g., 90 series 2010 ) or a well-maintained used model from the last decade would offer better reliability and efficiency. However, if you find a clean, low-hour example with a solid service record, it can still be a great value.

Details:

Shipped with USPS Ground Advantage. Condition is New. Mercury Outboard Mercruiser Spacer NEW. Free Shipping.

part #: 2399299 prices

• $9.95-$24.99

specifications ouboaen:

• for models: Mercruiser
• for makes: Mercury
• mpn: 23-99299
• part type: Spacer

shipping ouboaen:

• cost: $0.00
• service: USPS Ground Advantage
• carrier: USPS
• class: Standard
• transit: 4-9 Days
• type: Calculated

seller ouboaen:

• city: Stamford, Connecticut
• # reviews: 721
• rating: 100.0%

payments ouboaen:

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

general ouboaen:

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

returns ouboaen:

• policy: No Returns

offer ouboaen:

• quantity: 2
• availability: In Stock
• options: Ship-to-home
• sold: 0
• started: January 31, 2026

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