Description
4203 350 5801 Tank Vent | Genuine STIHL OEM Replacement
The 4203 350 5801 Tank Vent is a genuine STIHL OEM replacement component designed to regulate pressure inside the fuel tank of compatible STIHL outdoor power equipment. A properly functioning tank vent allows the fuel system to maintain appropriate pressure as fuel is consumed while helping prevent excessive pressure or vacuum buildup.
This part is used across a wide range of STIHL blowers and backpack blowers, including BG, BR, SH, and SR models.
Features That Make a Difference
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Genuine STIHL OEM replacement part
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Part Number: 4203 350 5801
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Alternate Part Number: 42033505801
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Product Type: Tank Vent / Fuel Tank Vent
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Helps regulate fuel-tank pressure.
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Supports consistent fuel flow to the engine.
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Helps prevent excessive vacuum or pressure buildup inside the tank.
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Designed for reliable operation in STIHL outdoor power equipment.
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OEM construction provides proper fit and function.
Benefits
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Helps maintain proper fuel-tank ventilation.
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Supports consistent engine fuel delivery.
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Helps prevent fuel-flow problems caused by an improperly vented tank.
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Replaces a clogged, damaged, or deteriorated tank vent.
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Genuine STIHL design helps ensure correct fit.
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Ideal for fuel-system repair and maintenance.
Specifications
| Specification | Details |
|---|---|
| Part Number | 4203 350 5801 |
| Alternate Part Number | 42033505801 |
| Product Type | Tank Vent |
| Brand | STIHL |
| System | Fuel Tank / Fuel System |
| Function | Fuel Tank Pressure Regulation |
| Applications | BG / BR / SH / SR Series |
| Use | Fuel-System Repair / Replacement |
| Part Type | Genuine OEM Replacement |
Compatibility
The 4203 350 5801 Tank Vent is used in numerous STIHL models and assemblies, including:
BG Blowers
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BG 45
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BG 45 C KAT
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BG 46
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BG 46 C KAT
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BG 46-D
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BG 55
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BG 55 C KAT
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BG 65
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BG 65-D
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BG 85
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BG 85 C KAT
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BG 85-D
BR Backpack Blowers
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BR 340
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BR 340 L
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BR 380
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BR 420
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BR 420 C
SH & SR Equipment
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SH 55
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SH 85
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SH 85-D
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SR 420
The application location varies by model. On the BG and SH models, the vent is associated with the fan-housing/fan-housing-inside assembly, while on BR and SR models it is associated with the fuel-tank or container assembly.
Always verify your exact STIHL model, serial number, and original part number before ordering to ensure compatibility.
How the Tank Vent Works
A fuel tank needs to breathe as fuel is consumed. As the engine uses fuel, the volume of fuel inside the tank decreases. Without proper ventilation, a vacuum can develop inside the tank, potentially restricting fuel flow.
The tank vent allows the fuel tank to equalize pressure with the surrounding atmosphere while helping prevent unwanted fuel leakage.
A restricted or defective vent can contribute to symptoms such as:
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Engine starts and then loses power.
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Engine stops after running for a period of time.
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Poor or inconsistent fuel delivery.
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Fuel-system pressure or vacuum problems.
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Engine performance improves temporarily when the fuel-tank cap is loosened.
Why Replace the Tank Vent?
Over time, dirt, fuel residue, and normal wear can restrict or damage the tank vent. A properly functioning vent is important for maintaining consistent fuel delivery.
Replacing a clogged or damaged vent with the correct STIHL OEM component helps restore proper fuel-system ventilation.
Why Buy from Barry’s Power Equipment?
Barry’s Power Equipment provides quality OEM and replacement parts for lawn, garden, and outdoor power equipment.
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Genuine OEM replacement parts
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Quality products for residential and commercial equipment
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Competitive Pricing
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Fast Shipping
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Expert Customer Support
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Reliable parts for professional equipment repair and maintenance
Keep your compatible STIHL blower or outdoor power equipment’s fuel system properly ventilated with the STIHL 4203 350 5801 Tank Vent, a genuine OEM replacement for select BG, BR, SH, and SR models.
