fits make: Mercury. year: 2005.

( Manufacturer Part Number: 900-858485T07 ), ( Part Type: Hp Cylinder Head )
The 900-858485t07 Mercury Optimax 225 HP 3.0L outboard engine is a powerful and reliable marine propulsion system. This particular engine features a starboard cylinder head, which is the right-hand side cylinder head in an inline engine configuration.
The Mercury Optimax 225 HP engine is known for its exceptional performance and fuel efficiency. It is powered by a 3.0L (183 cubic inch) displacement inline-six four-stroke engine, which delivers a peak horsepower of 225 at 5600 RPM. This engine is equipped with Mercury's advanced Electronic Fuel Injection (EFI) system, which provides precise fuel delivery for optimal performance and reduced emissions.
The engine also features Mercury's Advanced Mid-Section (AMS) design, which provides improved rigidity and reduced weight for better acceleration and handling. The engine is also equipped with Mercury's SmartCraft digital control system, which allows for easy adjustment of engine settings and monitoring of engine performance.
The starboard cylinder head on this engine is made of high-quality materials and features advanced cooling technology to ensure reliable operation in even the most demanding marine environments. The engine is also equipped with a heavy-duty gearcase and drive system for durability and long-lasting performance.
Overall, the 900-858485t07 Mercury Optimax 225 HP 3.0L outboard engine is a powerful and reliable marine propulsion system that provides exceptional performance and fuel efficiency. Its advanced features and durable construction make it an excellent choice for boaters who demand the best in terms of performance and reliability.
Pros of buying a 2005 Mercury Optimax 225 HP 3.0L with Starboard Cylinder Head (900-858485 T01):1. Powerful Engine: The 225 HP engine provides ample power for water sports and high-speed cruising.
2. Reliability: Mercury is known for its durable and reliable engines, which can be a significant advantage for boat owners.
3. Replacement Parts Availability: As a popular engine model, replacement parts for the 2005 Mercury Optimax are widely available, making repairs and maintenance more convenient.
4. High Resale Value: Mercury engines are often sought after in the used boat market, which can help retain the value of the boat if you decide to sell it in the future.
Cons of buying a 2005 Mercury Optimax 225 HP 3.0L with Starboard Cylinder Head (900-858485 T01):1. Age: The engine is over 15 years old, which may mean more frequent maintenance and repairs are required.
2. Fuel Efficiency: Older engines may not be as fuel-efficient as newer models, which could result in higher fuel costs.
3. Higher Insurance Rates: Older boats and engines may be more expensive to insure due to higher replacement costs and increased risk of mechanical failure.
4. Lack of Advanced Technology: Some newer engines come with advanced features like electronic fuel injection, which may not be available on this engine model.
Recommendation:The 2005 Mercury Optimax 225 HP 3.0L with Starboard Cylinder Head (900-858485 T01) is a reliable and powerful engine option for a used boat. However, potential buyers should consider the age of the engine and its potential maintenance and repair costs. If you are looking for a high-performance engine with a proven track record and a strong resale value, this engine may be a good fit for you. However, if you prioritize lower maintenance costs and advanced technology, you may want to consider a newer engine model. Ultimately, it is essential to conduct a thorough inspection of the engine and boat before making a purchase decision to ensure that it is in good working condition.
Engine had only 130 hrs and used in fresh water the cylinder head is pristine Mercury Mercuries quicksilver oem part 858485t07 say-cyl-STD you are buying a almost brand new.