Carburetor PD18 with Electric Choke for 4-Stroke GY6 49cc 50cc Chinese Scooter 139QMB

Product Overview

Restore smooth fuel delivery and reliable engine performance with this PD18 18mm carburetor, designed for selected 4-stroke GY6 49cc / 50cc engines.

This replacement carburetor is suitable for many compatible Chinese scooters and mopeds using the 139QMB engine platform, including common applications from brands such as TaoTao, Jonway, and Baja.

Equipped with a 2-pin male plug electric choke, this carburetor helps deliver a proper air-fuel mixture for stable idle, smoother throttle response, and improved acceleration. It is also commonly used on compatible 100cc big bore setups when the intake size, air filter size, and choke connector match.

Product Compatibility

Brand / Platform	Model	Engine / HP / CC	Year Range	Notes
GY6 Platform	Chinese Scooter / Moped	49cc / 50cc	Please verify	Match by intake size, air filter size, and choke plug
Engine Code	139QMB	49cc / 50cc	Please verify	Common GY6 4-stroke scooter engine
TaoTao	Scooter / Moped	49cc / 50cc	Please verify	Verify original carburetor size before purchase
Jonway	Scooter / Moped	49cc / 50cc	Please verify	Verify original carburetor size before purchase
Baja	Scooter / Moped	49cc / 50cc	Please verify	Verify original carburetor size before purchase
GY6 Big Bore Setup	Compatible modified engines	100cc	Please verify	Match by intake, jetting, and air filter setup

Specifications

Specification	Details
Part Type	Carburetor
Carburetor Model	PD18
Carburetor Size	18 mm
Engine Type	4-Stroke GY6
Engine Compatibility	49cc / 50cc
Compatible Engine Code	139QMB
Big Bore Compatibility	Selected 100cc big bore setups
Choke Type	Electric Choke
Choke Plug Style	2-pin male plug
Intake Manifold Inner Diameter	18 mm / 0.70"
Intake Manifold Outer Diameter	28 mm / 1.10"
Main Jet Size	#75
Air Filter Intake Inner Diameter	35 mm / 1.37"
Air Filter Intake Outer Diameter	39 mm / 1.53"
Fitment Method	Match by intake size, air filter size, choke plug, and original carburetor layout
Condition	100% New Aftermarket

Key Features

• PD18 18mm Carburetor Design – Built for selected GY6 49cc / 50cc 4-stroke engines
• 139QMB Engine Compatibility – Suitable for many common Chinese scooter and moped applications
• 2-Pin Electric Choke – Designed for vehicles using a 2-pin male plug electric choke setup
• #75 Main Jet – Common jet size for compatible 50cc and selected big bore configurations
• Stable Air-Fuel Mixing – Helps support smoother idle, throttle response, and acceleration
• Brand New Aftermarket Replacement – Practical replacement for worn, clogged, or poorly performing carburetors

Package Includes

1 × PD18 18mm Carburetor with 2-Pin Electric Choke

Fitment Note

Please confirm your engine type, intake manifold diameter, air filter intake size, choke plug style, jet size, and original carburetor appearance before ordering.

This carburetor is intended for selected 4-stroke GY6 49cc / 50cc 139QMB engines and some compatible 100cc big bore setups. Compatibility may vary by scooter brand, intake manifold, air box setup, throttle cable, choke connector, and fuel line layout.

If you are unsure about compatibility, contact us with your vehicle model, engine size, original carburetor photos, intake measurement, air filter measurement, and choke plug photos before purchase.