Products Description
GX390 / 188F Generator Ignition Coil
Ignition Module for Honda GX390 & Clone Engines
OEM replacement ignition coil (30500-Z5T-003 / 30500-ZE2-023) for GX340/GX390 and 188F clone engines. Generates high-voltage spark to ignite fuel-air mixture. Transistorized design with 4-pin connector for reliable starting and stable operation. Direct-fit replacement for worn or failed coils causing no-spark conditions
Technical Profiles & Materials
Reliable Spark Generation – Captures flywheel magnetic energy, transforms to high-voltage pulse for consistent ignition under all operating conditions .
Transistorized Design – Solid-state circuitry provides stable spark timing, improved combustion efficiency, and enhanced electrical performance .
OEM Cross-Compatibility – Replaces Honda 30500-Z5T-003, 30500-ZE2-023, 30500-ZF6-W01. Fits both genuine Honda and clone engine families .
Wide Application – Suitable for generators, water pumps, pressure washers, and small machinery .
Complete Kit Option – Some versions include spark plug and feeler gauge for proper gap setting .
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. | 30500-Z5T-003 / 30500-ZE2-023 / 30500-ZF6-W02 |
| 2 | Compatibility | GX240, GX270, GX340, GX390, 188F, 420cc clones |
| 3 | Connector Type | 4-pin (3-wire: red, black, yellow) |
| 4 | Material | Plastic body + iron core |
| 5 | Weight | Approx. 267g – 390g |
| 6 | Center Hole Distance | Approx. 68mm |
| 7 | Coil Gap (Stock Flywheel) | 0.30mm – 0.45mm (0.012"–0.018") |
| 8 | Coil Gap (Billet Flywheel) | 0.76mm – 1.40mm (0.030"–0.055") |
Products Application
Generators
Restores ignition on 5-8KW portable generators with GX390/188F engines. Prevents no-start situations and ensures stable AC output during operation
Water Pumps & Pressure Washers
Reliable spark in wet/dusty conditions. Direct replacement for pump applications requiring consistent ignition.
Construction Equipment
Ideal for compactors, tillers, and other GX390-powered machinery where vibration can cause coil failure
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FOR 10000+ OUALITY PARTS
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FAQ
Q: How to confirm this coil fits my engine?
A:Check engine code stamped on housing. Fits GX240, GX270, GX340, GX390, and clone 188F/420cc. Replaces OEM 30500-Z5T-003, 30500-ZE2-023. Verify connector type (4-pin vs older single-wire) as GX390 has different versions .
Q: What is the correct air gap setting?
A: Stock cast flywheels: 0.30–0.45mm (0.012"–0.018"). Use a feeler gauge between coil and flywheel magnet. Billet flywheels require larger gap.
Q: Why does my engine have no spark after coil replacement?
A: Check: coil gap setting; 4-pin connector wiring (red/black wires connect for engine ON); oil level sensor (yellow wire); safety switch or wiring fault causing intermittent spark.
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