fits make: Mercury. year: 1975–2020.

( Manufacturer Part Number: 9011J37 ), ( Part Type: Hp Unit ), ( Stroke: 2-stroke ), ( Engine Hp : 75, 90, 115 )
The Mercury 9011J37 Optimax 75/90/115 HP Lower Unit Gearcase 2.33:20 is a high-performance marine propulsion system designed for serious boaters seeking power and reliability. This lower unit gearcase is specifically engineered for Mercury Optimax outboard engines with a displacement of 75, 90, or 115 horsepower.
The Mercury 9011J37 features a robust 2.33:1 gear ratio, which provides excellent thrust for tackling various water conditions and speed demands. The gearcase is equipped with a heavy-duty, four-blade, stainless-steel propeller, ensuring optimal propulsion and maneuverability.
The lower unit's construction consists of high-quality materials, such as corrosion-resistant aluminum alloy, ensuring durability and longevity in saltwater and freshwater environments. An integrated, self-adjusting, and maintenance-free lower unit oil system ensures proper lubrication and extends component life.
Additionally, this gearcase boasts Mercury's innovative, power-enhancing, and fuel-efficient Multi-Point Injection (MPI) technology, delivering precise fuel delivery for maximum engine performance and fuel efficiency. The Mercury 9011J37 also incorporates a reliable, water-cooled, and adjustable lower unit exhaust system, maintaining engine temperature and reducing noise levels.
Easy to install and service, the Mercury 9011J37 lower unit gearcase is a powerful and dependable choice for boaters seeking a high-performance, reliable, and low-maintenance propulsion system.
Pros of buying a Mercury 9011J37 Optimax 75-90-115 hp lower unit gearcase 2.33 20:1. Powerful and Versatile: This lower unit is designed to handle a wide range of power output, making it a great choice for various boat sizes and types.
2. Durable Construction: Mercury uses high-quality materials in their products, ensuring that this gearcase will withstand the rigors of frequent use and harsh marine environments.
3. Superior Performance: The 2.33:1 gear ratio provides excellent acceleration and top speed, while the 20-inch pitch propeller ensures efficient power transfer.
4. Easy Maintenance: Mercury's gearcases are designed with easy access to maintenance points, making routine maintenance a breeze.
5. Reliability: Mercury is a well-known and trusted brand in the marine industry, so you can expect reliable performance and longevity from this product.
Cons of buying a Mercury 9011J37 Optimax 75-90-115 hp lower unit gearcase 2.33 20:1. Price: As with most high-quality marine products, this gearcase is not cheap. It may be a significant investment for some boat owners.
2. Complex Installation: While the maintenance is easy, the installation of this gearcase may require professional help due to its size and complexity.
3. Limited Availability: Mercury products are not as widely available as some other brands, so you may have to travel further or wait longer to get this gearcase if it's not carried by a local dealer.
Recommendation:If you're looking for a powerful, reliable, and high-performance lower unit for your boat, the Mercury 9011J37 Optimax 75-90-115 hp gearcase is a great choice. Its durability, versatility, and easy maintenance make it a worthwhile investment for boat owners who value performance and reliability. While the price and installation complexity may be drawbacks for some, the benefits of this gearcase often outweigh these cons for serious boaters. If you're unsure about the installation or have any other concerns, consult with a professional marine technician to ensure that this gearcase is the right fit for your boat.
This gearcase is designed for 75, 90, and 115 HP engines compatible with a 20-inch PN 9011J37. It is made by the trusted brand Mercury. With a 2.33:1 gear ratio, it provides efficient and reliable performance for your boat. This complete outboard lower unit gearcase is a must-have for any boater seeking reliable and high-quality addition to their vessel.
The manufacturer part number for this gearcase is 9011J37. This unit will need a water pump and gear lube before install. This Mercury Optimax lower unit gearcase is the perfect addition to your outboard engine. Unit has no known leaks and shifts like it should.Location- S2U107 10 06.