SIERRA 18-6747 International Tilt

( Brand: Sierra ), ( Manufacturer Part Number: 18-6747 ), ( Bundle Description: Sierra International 18-6747 Tilt And Trim Assembly For Late Mod ), ( Compatible Product: Other Compatible Product ), ( Custom Bundle: No ), ( Type: Other Type )

Review SIERRA International Tilt And Trim Assembly Late Model fits MERCRUISER

The **Sierra 18-6747 International Tilt for Mercruiser** is a premium, high-performance tilt mechanism designed specifically to enhance the functionality, convenience, and longevity of Mercruiser marine engines. Engineered with precision and built to withstand the rigorous demands of both recreational and commercial boating applications, this tilt system seamlessly integrates with a wide range of Mercruiser outboard and sterndrive engines, providing smooth, reliable operation whether you're cruising along calm coastal waters or navigating through rougher conditions. Crafted from durable marine-grade materials, including high-strength steel and corrosion-resistant components, the 18-6747 is engineered to endure the harsh marine environment, resisting saltwater corrosion, UV degradation, and mechanical wear over extended periods of use. Its robust construction ensures minimal maintenance requirements while delivering consistent performance, making it an ideal choice for boat owners who prioritize durability without compromising on ease of use.

One of the standout features of the Sierra 18-6747 is its **adjustable tilt angle**, which allows for optimal engine placement and water flow, whether you're in transit, anchoring, or preparing for docking. The system incorporates a **hydraulic tilt mechanism**, ensuring smooth and effortless operation with minimal effort from the operator. This hydraulic assist not only reduces operator fatigue but also minimizes the risk of strain or injury, particularly during prolonged use or in challenging conditions. The tilt system is also designed with **quick-release functionality**, enabling rapid and secure engagement or disengagement of the engine tilt, which is invaluable for quick adjustments or when transitioning between different boating modes. Additionally, the 18-6747 is compatible with Sierra s **electronic tilt controls**, offering seamless integration with modern boat automation systems for enhanced convenience and customization.

Beyond its functional advantages, the Sierra 18-6747 is also designed with **aesthetic and practical considerations** in mind. Its sleek, streamlined housing blends seamlessly with the clean lines of modern Mercruiser engines, maintaining a polished appearance even after years of use. The system is also engineered to **minimize water intrusion**, with robust seals and gaskets that protect internal components from moisture and debris, thereby extending the life of both the tilt mechanism and the engine itself. For added peace of mind, Sierra includes **comprehensive warranties** and **technical support**, ensuring that any potential issues are addressed promptly by trained professionals. Whether you're upgrading an existing vessel or specifying this tilt system for a new build, the Sierra 18-6747 International Tilt for Mercruiser represents a superior investment in performance, reliability, and long-term value, making it a top-tier choice for discerning boat owners and marine professionals alike.

### **Pros and Cons of buying a Sierra 18-6747 International Tilt for Mercruiser Engines**

1. **Compatibility and Fitment** The Sierra 18-6747 is specifically designed for International (now Navistar) engines, including Mercruiser models, ensuring a proper seal and alignment. This reduces the risk of leaks or improper installation compared to generic or aftermarket tilts.

2. **Durability and Quality** Sierra is a well-regarded brand in marine and industrial engine components, known for robust construction. The 18-6747 is built to withstand frequent use, vibration, and environmental stress, making it a reliable long-term solution.

3. **Easy Installation** The tilt mechanism is designed for straightforward installation, often requiring minimal modifications to the engine bay. Many users report that it can be fitted with basic tools, though professional help is recommended for first-time installations.

4. **Adjustable Tilt Angle** The unit allows for precise adjustment of the engine s tilt position, which is useful for maintenance access, cooling system optimization, or adjusting the drive shaft angle for better performance.

5. **Reduced Wear on Components** By allowing the engine to be tilted for maintenance (e.g., changing oil, inspecting the lower unit), the tilt mechanism helps prevent unnecessary strain on the engine and transmission during servicing.

6. **Compatibility with Aftermarket Modifications** Since the tilt is designed for International/Mercruiser engines, it works well with common aftermarket upgrades like performance exhausts, intake systems, or transmission modifications.

7. **Warranty and Support** Sierra offers warranties on their products, and many marine dealers or mechanics have experience with this specific tilt, providing troubleshooting support if issues arise.

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1. **Cost** The Sierra 18-6747 is not a cheap component. Depending on the market and retailer, prices can range from $300 to $600 or more, which may be a significant investment for some boat owners.

2. **Installation Complexity** While the tilt itself is relatively straightforward, integrating it into an existing engine bay may require additional labor, such as modifying brackets, wiring harnesses, or ensuring proper clearance for the tilted position. Professional installation is often recommended to avoid mistakes.

3. **Potential for Leaks** If not installed correctly, gaskets or seals can fail, leading to oil or coolant leaks. This is a risk with any engine modification, but improper fitment could exacerbate the issue.

4. **Limited Availability of Parts** While Sierra is a reputable brand, finding replacement parts (e.g., seals, gaskets, or the entire tilt unit) may be challenging compared to more universally available components. Stocking spare parts in advance is advisable.

5. **Weight and Space Considerations** The tilt mechanism adds weight to the engine bay, which could affect the boat s balance or handling. Additionally, the tilted position may require adjusting other components (e.g., exhaust, steering cables) to ensure they operate correctly.

6. **Compatibility with Custom or Modified Engines** If the engine has been heavily modified (e.g., forced induction, custom blocks, or non-standard mounts), the Sierra tilt may not fit perfectly. Always verify compatibility with the specific engine configuration.

7. **Learning Curve for Maintenance** Tilting the engine for maintenance introduces a new step to routine upkeep. Some boat owners may forget to return the engine to the upright position, leading to potential issues with cooling or drivetrain alignment.

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The Sierra 18-6747 International tilt for Mercruiser engines is a high-quality, specialized component that offers significant benefits for boat owners who need to service their engines more easily. Its compatibility with International/Mercruiser engines, durability, and ease of use make it a strong choice for those who prioritize convenience and long-term reliability. However, the upfront cost, potential installation challenges, and the need for careful maintenance cannot be overlooked.

For most **performance boats, fishing vessels, or heavily used recreational boats** where regular engine maintenance is essential, the Sierra tilt is a worthwhile investment. It is particularly valuable for owners who frequently perform their own servicing or lack easy access to a dry dock.

For **casual boaters or those with minimal maintenance needs**, the cost and complexity may not justify the purchase. In such cases, alternative solutions like a **portable engine hoist or a simpler tilt mechanism** (if available for the specific engine) could be more practical.

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- You own a Mercruiser-powered boat with an International engine (or a compatible model).

- You frequently perform your own engine maintenance and need easier access.

- You are willing to invest in a high-quality, long-lasting solution.

- You have access to professional installation or are comfortable with a moderately complex DIY project.

- Your budget is tight, and you can find a less expensive alternative (e.g., a used tilt or a different brand).

- Your engine has been heavily modified, and compatibility is uncertain.

- You rarely service the engine yourself and have easy access to a dry dock or marine mechanic.

- You are unsure about the installation process and cannot afford professional help.

**Final Verdict:** For the right boat owner, the Sierra 18-6747 is a **smart purchase** that enhances convenience and reduces long-term maintenance hassles. However, weigh the pros and cons carefully against your specific needs before committing. If in doubt, consult a marine mechanic experienced with Mercruiser engines to confirm fitment and feasibility.

Details:

Fits: Late model Mercruiser Stern drive Applications. This platform is now integrated and seamless. Sierra warrants its products to be free of defects in workmanship and materials for the useful life product. Sierra Rewind Spring Replaces Johnson/Eventide Outboard 312932 18-6511.

Replaces: Mercruiser-865380A25, 865380A15, 865380A05, 865380A02, 14336A28, 14336A22, 14336A17, 14336A15, 14336A9, 14336A6, 88183A12, 96477A3. Sierra 18-6747 Tilt and Trim Assembly for Late model Mercruiser Stern drive. You can view Sierras full warranty located above in the Technical Specification Section.

part #: 186747 prices

• $831.18-$1760.88

specifications ignitionstartin:

• for models: Mercruiser
• brand: Sierra
• mpn: 18-6747
• bundle description: Sierra International 18-6747 Tilt And Trim Assembly For Late Mod
• compatible product: Other Compatible Product
• custom bundle: No
• type: Other Type

payments ignitionstartin:

• other
• credit card: Diners-club
• wallet: Paypal

seller ignitionstartin:

• rating: 99.0%
• city: Wheeling, Illinois
• # reviews: 113224

offer ignitionstartin:

• sold: 0
• options: Ship-to-home
• availability: In Stock
• started: June 8, 2026
• quantity: 7

shipping ignitionstartin:

• type: Fixed
• service: Economy
• transit: 12-19 Days
• class: Economy
• cost: $0.00

returns ignitionstartin:

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

general ignitionstartin:

• condition: New
• Boat Parts > Inboard Engines Components > Ignition Starting Systems

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