Non-Genuine Engine Rebuild Kit for Stihl MS391 Chainsaw

Revitalize your Stihl MS391 chainsaw with this comprehensive non-genuine Engine Rebuild Kit from HL SUPPLY. This kit includes a high-quality Hyway brand Titanikel plated cylinder, a specialized pop-up piston kit, bearings, oil seals, spark plug, and air filter, making it an ideal replacement for multiple OEM part numbers, ensuring your chainsaw returns to peak performance. Note: This kit is designed specifically for Stihl MS391 models with a 3 bolt intake.

Replaces OEM Part Numbers:

• 1110-400-7005
• 9639-951-1584
• 9523-003-4301
• 1141-140-4400
• 9512-003-3061
• 1140-020-1204

Compatible with Stihl Model:

• Stihl MS391

Important Note: This kit will ONLY fit models that use a 3 bolt intake.

Features:

• Includes a Hyway brand Titanikel plated cylinder for superior durability and performance
• Features a pop-up piston kit for enhanced compression and power
• Complete with bearings, oil seals, spark plug, and air filter for a full engine rebuild
• Designed for easy installation, reducing downtime

What is a Pop-Up Piston?

A pop-up piston is a specialized piston design used in some chainsaw engines. Unlike traditional pistons that have a flat top, pop-up pistons feature a raised center section. This design allows for a higher compression ratio within the combustion chamber. When the piston moves upward in the cylinder, the raised center section compresses the fuel-air mixture more intensely than a traditional flat-top piston. This increased compression leads to a more powerful explosion and greater torque output.

Benefits of a Pop-Up Piston:

• Increased Power: The higher compression ratio generated by a pop-up piston results in a significant increase in power and torque, ideal for heavy-duty tasks like cutting through dense wood or felling large trees.
• Improved Efficiency: The efficient combustion process enhances fuel economy, reducing the fuel needed for the same power output.
• Enhanced Torque: More torque makes cutting through tough materials easier, reducing strain on both the operator and the engine.

What is Titanikel Plating?

Titanikel plating is a proprietary technology by Hyway, utilizing a high-temperature steam plating process at 900 to 1000 degrees Celsius to apply a titanium-nickel composite. This method results in a strong, wear-resistant surface suitable for high-performance applications.

Titanikel Plating Process:

The process involves multi-composite electroplating where the cylinder's inner surface is coated with a titanium-nickel composite. After plating, the surface is ground with diamond tools due to the high strength of titanium, achieving a smooth finish.

Benefits of Titanikel Plating:

• High Temperature Resistance: Titanikel can endure extreme heat, ensuring the longevity of engine components during operation.
• Durability: The titanium-nickel composite provides superior wear resistance, extending the life of your chainsaw's cylinder.
• Chemical Resistance: With titanium's natural resistance to chemicals, the cylinder remains protected in various conditions.
• Smooth Operation: The plating's smooth finish reduces friction, improving engine efficiency and reducing wear on moving parts.
• Optimal Strength-to-Weight Ratio: Titanikel offers a balance of high strength and low weight, which is crucial for the performance of chainsaws.

From HL SUPPLY, this Engine Rebuild Kit is your go-to for cost-effective, high-quality maintenance of your Stihl MS391 chainsaw, ensuring reliability and enhanced performance.