Walbro 102-427 Idle Needle for Small Engine Carburetors

The Walbro 102-427 is an OEM replacement idle needle designed for Walbro diaphragm carburetors used in small engines. This precision-engineered component controls the air-fuel mixture during idle and low-speed operation, ensuring smooth engine performance and proper carburetor function.

Key Features:

• Genuine Walbro OEM part for reliable fit and performance
• Controls idle mixture and affects low-speed carburetor operation
• Precision-machined needle tip with fine threads for accurate adjustment
• Essential replacement component for carburetor rebuilds and maintenance
• Designed for use in small engines found in chainsaws, lawn equipment, and outdoor power equipment

The idle needle works by regulating fuel flow when turned in (leaning the mixture) or turned out (richening the mixture). Proper adjustment is critical for smooth idle, responsive acceleration, and optimal engine performance. This component should be handled carefully during installation to avoid damaging the needle tip or seat, which could prevent proper carburetor adjustment.