Blue Line Ignition Coil w/ 18" Lead :139QMBand GY6 50/150cc

Reliable Ignition: Blue Line GY6 50/150cc Ignition Coil Restore your engine’s firing consistency with the Blue Line Ignition Coil Assembly . Engineered as a high-quality, OEM-equivalent replacement for the GY6 and 139QMB engine platforms, this coil is the solution for common electrical issues like weak spark, intermittent stalling, or "no-start" conditions. Whether you are maintaining a daily commuter or refreshing a project bike, Blue Line provides the factory-level performance you need without the premium price tag. Technical Performance Features Complete Assembly: Includes a high-output two-pole coil, a heavily insulated 18-inch spark plug wire, and a reinforced 90-degree spark plug cap for a total ignition overhaul. Extended 18" Plug Wire: The generous lead length provides extra flexibility for custom mounting and ensures compatibility with "Long Case" scooters, where the coil is mounted further from the cylinder head. Weather-Sealed Cap: Features a thick rubber boot at the plug connection to prevent moisture and debris from grounding out your spark in wet riding conditions. Dual-Pole Connection: Designed for standard GY6 wiring harnesses, making this a true "plug-and-play" installation with no splicing required. Comprehensive Fitment Guide This ignition coil is compatible with 50cc, 125cc, 150cc, and 170cc 4-Stroke Engines . If your engine code includes "QM" or "FM", this part is a direct fit: Engine Type Common Compatible Engine Codes 50cc 4-Stroke 139QMB, 1P39QMB, 139QMA, YN139QMB 125cc/150cc 152QMI, 157QMJ, 1P57QMJ, JJ157QMJ, BN157QMJ 170cc / Stroker 161QMK, 1P61QMK, BN161QMK-A Technical Specifications Wire Length: 18 Inches (457mm) Coil Type: 2-Pole (Primary/Ground) Spark Plug Cap: 90-Degree Resistor Style Brand: Blue Line (OEM-Equivalent) Mechanic's Note: Ignition coils often fail when they get hot, leading to a scooter that runs for 10 minutes and then dies. Pro Tip: When installing this new coil, always pair it with a fresh NGK CR7HSA Spark Plug . A fouled or old plug can put unnecessary strain on your new coil, leading to premature failure. SKU: 0900-1104 Original Parts For Scooters SKU 164-329, SKU 164-55 Vendor: Blue Line Compatibility: 157QMJ-based 125cc / 150cc / 169cc engines with the following engine codes: 157QMJ 161QMK 152QMI 1P61QMK YN1P57QMJ 1P52FMI 154FMI JJ157QMJ 1P57QMJ BN157QMJ BN161QMK-A