Primer Bulb Assembly – Fits STIHL FS120 FS250 FS300 FS350 FS400 FS450 (Walbro 188-512-1)

Product Description

Description:
This high-quality aftermarket primer bulb assembly replaces Walbro 188-512-1 and is designed to suit a range of STIHL brushcutters and clearing saws. It ensures proper fuel priming, improving starting performance and maintaining smooth engine operation.

Ideal for replacing worn, cracked, or leaking primer bulbs.

🔄 Replaces OEM Part Numbers

Walbro:
• 188-512-1

🔁 Aftermarket / Cross References

• Walbro: 188-512-1
• GA Spares: — CAS8735

📏 Specifications

• Type: Primer bulb assembly / fuel pump primer
• Application: 2-stroke carburettor systems
• Material: Flexible rubber bulb with housing

✅ Fits Applications

Suitable for STIHL models including:

• FS120
• FS250
• FS300
• FS350
• FS400
• FS450

👉 Commonly used on brushcutters and clearing saws with Walbro carburettors

⚙️ Function

• Primes fuel into the carburettor
• Assists with cold starting
• Improves fuel delivery
• Restores reliable engine operation

📦 Package Includes

• 1 × Primer Bulb Assembly