42380300400 Crankshaft Assembly for Stihl TS410 TS420 Cut Off Concrete Saw

This Crankshaft Assembly is a replacement engine component compatible with Stihl TS410 and TS420 Cut Off Concrete Saws and matches OEM Part# 4238-030-0400.

Product Overview

The crankshaft assembly is a complete rotating assembly for Stihl TS410 and TS420 cut-off saw engines. This crankshaft assembly replaces damaged or worn factory units to restore power and balance. Contractors and concrete cutting professionals rely on a precision crankshaft assembly to keep their Stihl saws operating at full performance.

Key Features & Performance

• Forged and machined steel construction for high-load durability
• Precision-ground bearing journals ensure stable rotation
• Includes integrated counterweights to reduce vibration
• Direct OEM replacement matches factory timing and stroke
• Ready to install with factory connecting rod (if included)

Fitment & Compatibility

• Stihl TS410 Cut Off Concrete Saw
• Stihl TS420 Cut Off Concrete Saw

Common Uses

• Engine rebuilds after bearing or seizure failure
• Replacing bent or cracked crankshafts in concrete saws
• Restoring compression and power in high-hour TS410/TS420 units
• Performance maintenance for professional demolition and cutting crews

Technical Specifications

• Part Number(s): 4238-030-0400
• Product Type: Crankshaft Assembly

Frequently Asked Questions

Q: Does this crankshaft assembly include the connecting rod and needle bearing? A: Many assemblies include the connecting rod, but confirm the listing details; if only the crankshaft with counterweights is supplied, reuse or purchase the rod separately.

Q: Is this a genuine Stihl factory part? A: This is an aftermarket replacement manufactured to meet OEM specifications; it is not an original Stihl component but provides equivalent fit and function.

Product appearance and specifications may vary slightly by batch. Compatibility may vary by serial number. Verify fitment before purchase.