Universal Carburetor Idle Spring: 50cc QMB139 — product image 2

Universal Carburetor Idle Spring: 50cc QMB139

$1.90
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Universal Carburetor Idle Spring: 50cc QMB139 — product image 2
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  • Universal Carburetor Idle Spring: 50cc QMB139 — product image 2
Universal Carburetor Idle Spring: 50cc QMB139

Universal Carburetor Idle Spring: 50cc QMB139

$1.90
Part number 151-199

Check dimensions and compatibility before ordering.
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Stop chasing your idle. This Universal Parts Carburetor Idle Screw Spring is the small compression spring that holds your air/fuel mixture screw in position against engine vibration. When this spring weakens or corrodes, the idle screw creeps out of adjustment, causing stalling, surging, and constant re-tuning. At $1.40 it's one of the easiest fixes on a QMB139-carbureted scooter.

Features

  • Precision Tension: Engineered to hold screw position under high-RPM vibration without over-tensioning.
  • Zinc-Plated Finish: Corrosion-resistant coating prevents binding inside the carburetor body.
  • Correct 10mm Length: Sized specifically for QMB139 and GY6 50cc carburetor idle/air screw ports.
  • Broad Compatibility: Fits most Chinese 50cc 4-stroke scooter carburetors.

Specifications

  • SKU: 151-199
  • Length: ~10mm
  • Material: Zinc-plated steel
  • Application: Carburetor idle / air adjustment screw return spring
  • Engine Type: 50cc 4-stroke (QMB139 / GY6)

Model Fitment

Brand Popular Models
Generic GY6 / QMB139 All 50cc 4-stroke QMB139 carbureted engines
Baja SC50, BE50
Kymco Agility 50, People 50
TaoTao / Bintelli / Peace / Roketa Most 50cc 4-stroke scooter models
Genuine Buddy 50 / RoughHouse 50 QMB139-carbureted variants

 

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