Blue Line Ignition Coil 18" Lead | 139QMB GY6 50/150cc

Restore your engine's firing consistency with the Blue Line Ignition Coil Assembly. An OEM-equivalent replacement for GY6 and 139QMB engine platforms, this coil solves common electrical issues like weak spark, intermittent stalling, and no-start conditions. The 18-inch lead provides extra flexibility for custom mounting and ensures compatibility with long-case scooters where the coil sits further from the cylinder head.

Key Features

• Complete assembly — includes 2-pole coil, 18" spark plug wire, and 90-degree resistor-style spark plug cap
• 18" plug wire — extra length for custom mounting and long-case engine compatibility
• Weather-sealed cap — thick rubber boot prevents moisture and debris from grounding out your spark
• Dual-pole connection — plug-and-play fit for standard GY6 wiring harnesses; no splicing required

Specifications

• Wire Length: 18 inches (457mm)
• Coil Type: 2-pole (primary/ground)
• Spark Plug Cap: 90-degree resistor style
• SKU: 0900-1104

Compatibility

Fits 50cc, 125cc, 150cc, and 170cc 4-stroke engines. If your engine code includes "QM" or "FM", this is a direct fit:

Mechanic's Tip: Ignition coils often fail when hot, causing a scooter that runs for 10 minutes then dies. When installing this coil, always pair it with a fresh NGK CR7HSA spark plug — a fouled or old plug puts unnecessary strain on the new coil and can cause premature failure.

California Prop 65 Warning: www.p65warnings.ca.gov

• Complete assembly — 2-pole coil, 18" spark plug wire, and 90-degree resistor cap included
• 18-inch lead for custom mounting and long-case engine compatibility
• Weather-sealed rubber boot on plug cap prevents moisture grounding
• Plug-and-play fit for standard GY6 wiring harnesses — no splicing required

Wire Length: 18 in (457mm) | Coil Type: 2-pole (primary/ground) | Cap: 90-degree resistor style | Engines: 139QMB 50cc, GY6 125/150/170cc 4-stroke | SKU: 0900-1104 | Origin: China

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