Staff Pick Mercruiser Upper Gearcase R/mr/alpha One 1.98 Gearset 43-55778a3 120hp 140hp Essentials [eEbO0Bdh]

Mercruiser Upper Gearcase Gearset for 120hp & 140hp Models

This Mercruiser Upper Gearcase Gearset is a perfect fit for your Pre-Alpha/R/MR/Alpha One Gen I sterndrive engines, offering a seamless and reliable performance for your boat. Designed for 120hp 2.5L and 140hp 3.0L 4-cylinder applications, this gearset is a must-have for any boat owner looking to upgrade or maintain their Mercruiser engine. With its 1.98 ratio, this gearset ensures optimal power transfer and efficiency, making it an ideal choice for a wide range of boating activities.

Technical Specifications and Features

The gearset included in this package is the 43-55766 and 43-55778A3, which are also equivalent to the Sierra equivalent 18-2205. This gearset is specifically designed for 20-24 tooth count, providing a perfect match for your 4-cylinder GM Chevy 120hp 2.5L and 140hp 3.0L engines. The upper driveshaft assembly 45-55797 is also included, ensuring a complete and hassle-free installation. This gearset is a direct replacement for earlier parts manuals, making it easy to install and compatible with your existing system.

Practical Uses and Benefits

Whether you're a seasoned boater or a weekend enthusiast, this Mercruiser Upper Gearcase Gearset offers numerous benefits. Its high-quality construction and precise engineering ensure durability and reliability, giving you peace of mind on the water. The gearset's 1.98 ratio provides excellent power transfer, allowing for smoother and more efficient performance. This gearset is a great choice for upgrading or replacing worn-out parts, extending the life of your engine and improving overall performance. With its wide compatibility and easy installation, this gearset is a practical solution for any boat owner looking to enhance their boating experience.