Universal Parts Insulator for QMB139 Carburetor
Universal Parts Insulator for QMB139 Carburetor
$13.33
10 in stock
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Product Details
Description
Universal QMB139 50cc Carburetor Intake Insulator Spacer
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: 50cc, QMB139
- Engine Code: QMB139
- Fitment Notes: 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 50cc scooters?
A: This SKU is listed with 50cc engine-size fitment. Confirm exact model, year, and part style before ordering.
Additional information
| Weight | 0.3 lbs |
|---|---|
| Dimensions | 5 × 5 × 1 in |
QMB139 50cc Carburetor Insulator
Protect your fuel system and ensure a stable idle with the Universal Parts Carburetor Insulator. Specifically designed for the 50cc 4-stroke QMB139 (GY50) engine platform, this high-density plastic spacer sits between the intake manifold and the cylinder head. Its primary function is to act as a thermal barrier, preventing extreme engine heat from reaching the carburetor, which can cause fuel boiling, "vapor lock," and inconsistent performance.
Technical Performance Features
- Thermal Isolation: Crafted from heat-resistant composite material that effectively blocks heat transfer, keeping your carburetor cool for more reliable fuel atomization.
- Airtight Sealing Surface: Features precision-flat mating surfaces to eliminate vacuum leaks, which are the leading cause of "hanging idles" and lean-run conditions on 50cc scooters.
- Standard 45mm Fitment: Engineered with the industry-standard 45mm bolt-hole spacing, ensuring a drop-in fit for almost all Chinese 50cc 4-stroke intake manifolds.
- Durable Composite Construction: Unlike cheap plastic alternatives, this insulator is designed to resist warping and cracking under the constant heat-cycling of an air-cooled engine.
Comprehensive Fitment Guide
This insulator is a standard replacement part for the 50cc 4-Stroke (QMB139/GY6 50) engine found in:
| Brand | Common Compatible Models |
|---|---|
| TaoTao | ATM50-A1, Pony 50, Speedy 50, Venus 50 |
| Wolf Brand | Islander, Jet, Lucky, RX-50, V50 |
| Bintelli | Breeze 50, Sprint 50, Havoc 50 |
| Chicago Scooter Co. | Go., Go. Max |
| Chinese 139QMB | Most Chinese model 50cc scooters |
Technical Specifications
- Center Hole Diameter: 16mm
- Bolt Hole Spacing: 45mm (Center-to-Center)
- Material: Heat-Resistant Phenolic/Plastic Composite
- Compatibility: 50cc 4-Stroke QMB139 Engines
Mechanic's Note: If your scooter runs great when cold but starts stumbling or dying once the engine gets hot, this insulator may be cracked or missing. Pro Tip: This insulator requires a Paper Gasket on both sides to create a true vacuum seal. Always check your Intake Manifold for cracks while you have this assembly apart.
SKU: 151-7
Vendor: Universal Parts
