The SPUR GEAR (STI) – 4230 640 7503 is a genuine STIHL replacement spur gear designed for use in the drive and transmission assemblies of selected STIHL petrol blowers and vacuum shredder units. Manufactured to STIHL’s original specifications, this precision gear ensures smooth power transfer, reliable engagement, and correct mechanical operation during use.
Ideal for repairs or refurbishment, this spur gear restores proper function where wear or damage has affected drivetrain performance.
Key Features
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Genuine STIHL Replacement Part – Manufactured to OEM standards for correct fit and performance
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Precision-Machined Gear Teeth – Ensures smooth and efficient power transmission
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Durable Construction – Designed to withstand continuous mechanical load
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Exact Fitment – Supports correct alignment and dependable operation
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Essential Drive Component – Ideal for servicing transmission or drive systems
Fits These STIHL Models
This spur gear (4230 640 7503) is used in selected STIHL blower and vacuum shredder models, including:
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BG 56 — Handheld petrol blower
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BG 66 — Compact petrol blower
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BG 86 — Professional handheld blower
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SH 56 — Blower vacuum shredder
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SH 86 — Professional blower vacuum shredder
Product Details
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Product Type: Spur gear
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Part Number: 4230 640 7503
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Brand: STIHL
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Application: Power transmission / drive mechanism
Why Choose Genuine STIHL Spur Gears
Using genuine STIHL components ensures precise fit, smooth mechanical operation, and long service life. The STIHL Spur Gear – 4230 640 7503 helps maintain correct drivetrain performance, reduces wear on surrounding components, and supports reliable operation of your STIHL blower or shredder unit.