Husqvarna Crankshaft Assembly 501 52 84-01

Husqvarna Crankshaft Assembly – Replaces OEM 501 52 84-01 & 503 61 33-71

Aftermarket Crankshaft for Husqvarna 61, 66, 266, 268 & 272 Chainsaws

Restore engine performance and reliability with this high-quality aftermarket crankshaft assembly designed for a wide range of Husqvarna professional chainsaws. This replacement crankshaft fits popular models including the Husqvarna 61, 66, 266, 268, and 272 series, replacing OEM part number 5036133-71.

🔧 Product Overview

This replacement crankshaft assembly is engineered to provide smooth engine operation, reliable power transfer, and long-lasting durability in demanding cutting conditions. Manufactured from precision-machined, high-strength steel, it is designed to withstand the high RPM, vibration, and heavy loads associated with professional forestry and firewood applications.

This is the updated crankshaft version featuring the newer fine-thread clutch shaft (M10 x 1-V). It is intended for use with the new-style centrifugal clutch OEM 501 77 85-01.

⚠️ Important Compatibility Note:
This crankshaft uses a fine-thread clutch connection (M10 x 1-V).
Older crankshafts used a 1/2″ 13 UNC-V thread.
When fitting this crankshaft to older models, you must also install the updated clutch #501 77 85-01.

✅ Key Features

• High-quality aftermarket crankshaft assembly
• Replaces OEM Husqvarna part number 503 61 33-71
• Also replaces older OEM references:
  • 501 52 84-01
  • 501 52 84-02
  • 501 52 84-03
• Updated fine-thread clutch shaft (M10 x 1-V)
• Compatible with new-style centrifugal clutch 501 77 85-01
• Precision-balanced design for smooth engine performance
• Heavy-duty steel construction for durability and long service life
• Designed for reliable fit and dependable operation
• Ideal for chainsaw rebuilds, repairs, and engine restorations

⚙️ Compatibility

Fits Husqvarna Chainsaw Models:

• Husqvarna 61
• Husqvarna 66
• Husqvarna 266
• Husqvarna 268
• Husqvarna 268 Special
• Husqvarna 272

Including multiple production years and variants.

🛠️ Service Note

This crankshaft assembly can also be fitted to older Husqvarna 61 models, including early production units, but the saw must be converted to use the newer fine-thread clutch system using clutch part number 501 77 85-01.

🔄 Also Known As

• Husqvarna crankshaft
• Chainsaw crank assembly
• Engine crankshaft replacement
• Crankshaft for Husqvarna 266
• Husqvarna 272 crankshaft
• Chainsaw engine crank

🌲 Typical Applications

• Rebuilding worn or damaged Husqvarna chainsaw engines
• Replacing seized or bent crankshafts
• Restoring compression and engine balance
• Professional forestry and arborist chainsaw repairs
• Firewood processing and heavy-duty cutting equipment maintenance

📦 Product Specifications

• Product Type: Crankshaft Assembly
• OEM Replacement: 503 61 33-71
• Alternate OEM Numbers:
  • 501 52 84-01
  • 501 52 84-02
  • 501 52 84-03
• Thread Type: M10 x 1-V Fine Thread
• Compatible Clutch: 501 77 85-01
• Material: Hardened precision-machined steel
• Application: Husqvarna petrol chainsaws

🚚 Built for Professional Chainsaw Performance

This Husqvarna crankshaft replacement is ideal for professional loggers, arborists, chainsaw repair workshops, and serious chainsaw owners looking for reliable engine rebuild components.

61 (1986-12)
61 (1987-11)
61 (1989-02)
61 (1991-03)
61 (1993-09)
61 (1997-01)
61 (1999-08)
61 (2001-10)
66 (1987-06)
66 (1988-08)
66 (1989-02)
66 (1991-03)
266 (1986-12)
266 (1987-11)
266 (1988-06)
266 (1989-02)
266 (1990-01)
268 (1987-05)
268 (1987-11)
268 (1989-02)
268 (1991-02)
268 (1993-09)
268 (1997-01)
268 (1999-11)
268 (2001-10)
268 (2007-01)
268 (2009-04)
268 Special (1991-02)
272 (1997-01)
272 (1999-11)
272 (2007-01)
272 (2009-04)
Service Note: This crankshaft assembly can also fit the below older models, but it should be installed with the new fine thread clutch #501 77 85-01:

61 (1980-02)
61 (1981-02)
61 (1982-05)
61 (1983-09)
61 (1984-01)
61 (1984-10)
61 (1985-06)
61 (1986-03)
162 (1980-02)
162 (1980-12)
266 (1981-09)
266 (1982-12)
266 (1983-06)
266 (1984-08)
266 (1984-10)
266 (1985-01)
266 (1985-06)
266 (1986-01)
266 (1986-04)
Note: This assembly includes the crankshaft and the connecting rod, and not the ball bearings for the crankshaft and the small-end needle bearing.