fits model: Xs, 250. make: Mercury.

( Manufacturer Part Number: 8859811 ), ( Part Type: Hp Block )
The Mercury 8859811 9811A98 Pro XS 250 HP Powerhead Block is a high-performance outboard engine block designed for serious boaters and anglers. This block is powered by a 250 horsepower Four-Stroke engine, which delivers excellent power and efficiency.
The Mercury 88519811 block is made with top-quality materials, including a high-strength aluminum alloy cylinder block and a precision-machined crankshaft for durability and long-lasting performance. The block features four-valve-per-cylinder design, which improves combustion efficiency and power output.
The Pro XS 250 HP Powerhead Block is equipped with Mercury's advanced digital electronic fuel injection system, which delivers precise fuel injection for improved fuel efficiency and lower emissions. The engine also features Mercury's advanced digital electronic ignition system, which delivers precise spark timing for improved performance and reliability.
The Pro XS 250 HP Powerhead Block is also equipped with Mercury's advanced cooling system, which includes a large-capacity water pump and a high-capacity heat exchanger. This helps to keep the engine running cool, even in the hottest conditions.
The block is also designed with Mercury's advanced anti-corrosion protection, which includes a high-tech paint system and a sacrificial anode to protect against corrosion. This ensures that the engine will last for many years of use, even in saltwater environments.
In summary, the Mercury 8859811 9811A98 Pro XS 250 HP Powerhead Block is a high-performance, durable, and reliable outboard engine block that is perfect for serious boaters and anglers. Its advanced features, such as digital electronic fuel injection and ignition, and its advanced cooling system, make it a top choice for boaters who demand the best performance and reliability.
Pros of buying Mercury 8859811 9811a98 Pro XS 250 HP Powerhead:1. High Power Output: With a maximum power output of 250 HP, this powerhead is capable of providing excellent performance and speed for a variety of water sports activities such as water skiing, wakeboarding, and tubing.
2. Reliable and Durable: Mercury is a well-known and respected brand in the marine engine industry, and the 8859811 9811a98 Pro XS 250 HP Powerhead is built to last with high-quality materials and manufacturing processes.
3. Advanced Technology: The powerhead features advanced technology such as OptiMax EFI, which provides precise fuel injection for optimal engine performance and efficiency.
4. Easy to Maintain: The powerhead is designed with easy-to-access components, making it easy to perform routine maintenance and repairs.
Cons of buying Mercury 8859811 9811a98 Pro XS 250 HP Powerhead:1. High Cost: The 250 HP powerhead is not cheap, and it may be out of budget for some buyers.
2. Requires Proper Installation: The powerhead should be installed by a professional to ensure proper functioning and safety.
3. Limited Compatibility: The powerhead is designed for specific applications and may not be compatible with all boats or watercraft.
Ending Conclusion:The Mercury 8859811 9811a98 Pro XS 250 HP Powerhead is a high-performance and reliable powerhead that is perfect for water sports enthusiasts who demand the best. While the cost may be a deterrent for some, the advanced technology and durability make it a worthwhile investment for those who can afford it. It is recommended to consult with a professional to ensure proper installation and compatibility before making a purchase.
Block casting number 885-9811-C23. Motor sat for a while and when we got fresh gas through vst she fired right up sounded good. Complete long block/powerhead. Serial 0T998595.
Pulled compression cold/dry before running and came back all around 95psi have pics of each Cl. Believe block is a 2005.