Description
Gearbox O-ring for 50cc 4-Stroke QMB139 Engines
This gearbox O-ring is designed for use with 50cc 4-stroke QMB139 engines, providing a reliable seal for your scooter or moped. It plays a key role in maintaining proper oil and fuel containment, helping to prevent leaks that can affect performance. It is one of the simpler scooter gaskets & seals to replace at home, ensuring your engine remains sealed and functional. Whenever you service your scooter or notice any leaks, this O-ring should be replaced to maintain engine integrity.
When to Replace It
O-rings and seals are important for keeping oil, fuel, and compression contained within the engine. They should be changed whenever you perform maintenance on your scooter or if you detect any leaks to avoid further engine issues.
Specifications
- Inner Diameter: 7.4mm
- Outer Diameter: 10.3mm
- Thickness: 1.4mm
- Fits: QMB139 50cc/49cc engines
Fitment
This O-ring is compatible with 50cc 4-stroke QMB139 engines, suitable for various makes and models.
Not sure it fits? Contact us with your scooter's make, model and year and we'll confirm the fit before you order.
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