fits make: Mercury. year: 1988–1991.

( Manufacturer Part Number: 39-18487A12 ), ( Part Type: Ring )
The Mercury 39-18487A12 Standard Piston Ring Set is a crucial component for maintaining the optimal performance and longevity of your Mercury outboard engine. This specific set is designed for engines manufactured between 1988 and 1991, with a power output range of 135 to 200 horsepower.
The set includes a comprehensive collection of high-quality piston rings, each meticulously crafted to provide superior sealing and engine efficiency. The rings are made from a durable, heat-resistant material that can withstand the intense pressures and temperatures generated within the engine's cylinders.
The Mercury 39-18487A12 Standard Piston Ring Set includes the following components:1. Compression Ring: This ring is responsible for sealing the combustion gases in the cylinder during the power stroke, ensuring optimal compression and power output.
2. Oil Control Ring: This ring controls the oil flow into the engine's piston skirt, preventing excessive oil consumption and ensuring proper lubrication.
3. Wear Ring: The wear ring protects the piston skirt from wear and damage caused by friction with the cylinder wall, extending the life of both components.
By installing this Mercury Standard Piston Ring Set, you can ensure that your engine is running at its best, delivering optimal performance while minimizing fuel consumption and reducing the risk of engine failure due to piston or cylinder damage.
Pros of buying a 39-18487A12 Mercury Standard Piston Ring Set for 1988-1991 outboard engines with 135-200hp:1. Original Equipment Manufacturer (OEM) part: This ring set is a direct replacement for the original piston rings that came with your Mercury outboard engine, ensuring a precise fit and reliable performance.
2. High-quality materials: The 39-18487A12 ring set is made from high-grade materials, such as chrome aluminum, which are designed to withstand the extreme heat and pressure generated by the engine.
3. Increased engine efficiency: Properly functioning piston rings help to seal the combustion chamber and reduce piston-to-cylinder wall contact, resulting in improved fuel efficiency and reduced engine wear.
4. Longer engine life: The use of high-quality piston rings can help to extend the life of your engine by reducing wear, preventing oil leaks, and minimizing engine friction.
Cons of buying a 39-18487A12 Mercury Standard Piston Ring Set:1. Cost: Replacement piston rings, especially for high-performance engines, can be expensive. The 39-18487A12 ring set may be priced higher than aftermarket alternatives.
2. Availability: Depending on the specific Mercury outboard engine model and availability, it may be difficult to find this exact piston ring set in local stores or through online retailers.
3. Installation complexity: Installing piston rings can be a complex process, requiring specialized tools and technical knowledge. If you are not comfortable performing this work yourself, you may need to pay for professional installation.
Recommendation:If you are looking for a reliable and high-quality replacement piston ring set for your 1988-1991 Mercury outboard engine with 135-200hp, the 39-18487A12 Mercury Standard Piston Ring Set is a good choice. While it may be more expensive than aftermarket alternatives, the OEM part guarantees a precise fit and reliable performance. If you are uncomfortable with the installation process, consider hiring a professional mechanic to ensure the job is done correctly. By investing in high-quality piston rings, you can extend the life of your engine and improve overall performance.
These retail for 500. Send me your serial number and i'll check to see if this will work for you.
This is a new set 12 of oem Mercury standard piston rings 39-18487A12 will fit 135 to 200hp from 1988 thru I have other sets too.