Non-Genuine Engine Rebuild Kit for Stihl MS391 Chainsaw

Revitalize your Stihl MS391 or MS311 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, crankshaft, 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 models with a 3 bolt intake. This kit will add 5 cc's to your MS311.

Replaces OEM Part Numbers:

• 1110-400-7005
• 1140-030-0401
• 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 crankshaft, 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. This is especially beneficial for applications that demand heavy-duty performance, such as cutting through dense wood or felling large trees.
• Improved Efficiency: The more efficient combustion process created by a pop-up piston can lead to improved fuel economy, reducing the amount of fuel needed to produce the same amount of power.
• Enhanced Torque: The increased torque generated by a pop-up piston can make it easier to drive the chainsaw through tough cuts, reducing strain on the operator and the engine.

What is Titanikel Plating?

Titanikel plating is a proprietary technology by Hyway, involving a high-temperature steam plating process where titanium and nickel are combined. This occurs at temperatures between 900 to 1000 degrees Celsius, resulting in a robust, wear-resistant surface perfect for high-performance engine components like cylinders.

Titanikel Plating Process:

The process includes multi-composite electroplating, where the cylinder receives a coating of titanium-nickel composite. Post-plating, the surface is polished with diamond tools due to titanium's high strength, resulting in an exceptionally smooth finish.

Benefits of Titanikel Plating:

• High Temperature Resistance: Titanikel can handle extreme temperatures, ensuring the cylinder's integrity under heavy use.
• Durability: The titanium-nickel composite significantly enhances wear resistance, extending the life of the cylinder.
• Chemical Resistance: With titanium's natural chemical resistance, the cylinder is protected against various environmental factors.
• Smooth Operation: The smooth finish reduces friction, improving the engine's efficiency and reducing wear on other components.
• Optimal Strength-to-Weight Ratio: Titanikel provides a balance of strength and lightweight, crucial for chainsaw performance.

From HL SUPPLY, this Titanikel Plated Cylinder Kit offers a cost-effective, high-quality solution to keep your Stihl MS391 running at its best.