Product Details
Description
Universal Parts QMB139 Longcase Engine
Key Details
- 220-41
Specifications
- Length: 122mm Accommodates 12-13 Inch Wheel Size Set Up For Drum Brake Set Up for PAIR Emissions System 8 Pole A/C Stator 69mm Valves Includes Premium Bando Drive Belt and NGK Spark Plug Engine Oil: 0.8 Liters Gear Oil: 0.12 Liters (filling) and 0.10 Liters (changing) Shipped Dry, Included Oil Not Installed – Do NOT Run Engine Without Adding Specified Amounts of Oil (Bel-Ray Oil Included) This Engine Only Ships to the Continental U.S. QMB139 50cc/49cc
Replacement Part Details
Use this part when the original component is worn, damaged, missing, or no longer working correctly. Many scooter parts can look similar but use different sizes, plugs, brackets, thread patterns, or mounting styles, so careful comparison before purchase is recommended.
Compatibility / Fitment
Use the fitment details below to confirm this part matches your scooter before ordering.
- Engine Size: 49cc, 50cc, QMB139
- Engine Code: QMB139
- Fitment Notes: Long Case, Universal Fit
Fitment Guide: This compatibility information is based on manufacturer and supplier data. Listed models are common known applications and may not include every compatible scooter. If your scooter has multiple versions or production changes, confirm the correct match before ordering. Check photos, measurements, original part numbers, engine code, model, and related fitment information whenever possible.
Common Fitment Questions
Q: Will this fit a QMB139 engine?
A: This SKU is listed as compatible with QMB139 engine-code fitment. Always compare your original part and scooter details before ordering.
Q: Is this for 49cc scooters?
A: This SKU is listed with 49cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 51.1 lbs |
|---|---|
| Dimensions | 6 × 4 × 2.1 in |
| Condition | New |
|---|
Universal Parts Premium QMB139, 49cc 4-Stroke complete engine, long crankcase version is the top of the line aftermarket replacement engine available in the marketplace. This is the only engine that has earned the Universal Parts stamp for our stringent quality and performance standards.
Engine is set up for PAIR Emissions System. PAIR is an acronym for Pulsed Secondary Air Injection System. It is an emissions control system used to lower HC and CO emissions. It works by allowing air into the exhaust flow
Please Read The Following Important Notices:
- This engine is shipped dry. DO NOT RUN ENGINE WITHOUT ADDING SPECIFIED AMOUNTS OF OIL.
- Check oil level after letting the engine idle for a few minutes, add additional oil if needed.
- Set Up For Drum Brakes
- This Engine Only Ships to the Continental U.S.
- Scooterworks.com has a no-return policy on all engines, barring manufacture defect or shipping damage.
- This is not the correct engine for Maddog style scooters, it will be too short.
- Premium Quality, Hand Inspected, QC Verified
- Output Shaft Length: 122mm
- Accommodates 12-13 Inch Wheel Size
- Set Up For Drum Brake
- Set Up for PAIR Emissions System
- 8 Pole A/C Stator
- 69mm Valves
- Includes Premium Bando Drive Belt & NGK Spark Plug
- Engine Oil: 0.8 Liters
- Gear Oil: 0.12 Liters (filling) and 0.10 Liters (changing)
- Shipped Dry, Included Oil Not Installed - Do NOT Run Engine Without Adding Specified Amounts of OilÂ
- This Engine Only Ships to the Continental U.S.
QMB139 50cc/49cc





