Annolai Ignition Coil for Honda GX390 GX340 Engines — Replacement for 30500-Z5T-003, 4‑Prong Plug

Annolai's GX390/GX340 ignition coil assembly is a direct-fit replacement for Honda part numbers 30500-Z5T-003 and 30500-Z5R-003, offering plug-and-play installation for compatible GX340 and GX390 engine models.

If your generator, pressure washer, or engine-powered equipment with a Honda GX340 or GX390 engine is experiencing hard starting, misfires, or weak spark, a worn ignition coil can be the culprit. This Annolai coil is built to match the original equipment form, fit, and connector style so you can restore reliable ignition without modifying wiring or mounting points. Manufactured to meet performance expectations, it’s intended for hobbyists and professionals who need a straightforward, long-life replacement part.

Which engines and part numbers does this coil fit?

This coil is designed to replace Honda part numbers 30500-Z5T-003 and 30500-Z5R-003 and fits many GX340 and GX390 model variants as well as several Honda generator and engine series. Always verify your OEM part number and connector type before ordering to ensure compatibility.

• Compatible with Honda GX340 and GX390 family engines (models listed below)
• Replaces 30500-Z5T-003, 30500Z5T003, 30500-Z5R-003, 30500Z5R003
• Fits generator/engine models: EB5000XK3, EB6500X1, EG5000CL, EG6500CL, EM5000SXK3, EM6500SXK2
• Includes a 4-prong connector—confirm your machine uses the same style

How easy is it to install this ignition coil?

The Annolai coil is built for a plug-and-play swap: the mounting points, lead length, and connector layout match OEM specifications so you can replace the coil without special tools or wiring changes. Installation time is typically short for anyone comfortable working around small engines.

• Direct replacement design—no trimming or rewiring required
• Uses the same 4-prong connector as the original part
• Standard bolt pattern and lead length for GX340/GX390 engines
• Recommended basic hand tools and adherence to engine safety procedures

What performance and durability features does this coil offer?

Annolai manufactures this coil from materials chosen to withstand heat and vibration common in small engines, helping preserve spark strength and operational reliability. While not a manufacturer warranty, its construction focuses on long service life under typical use conditions.

• High-grade insulation and windings to resist breakdown
• Robust housing to tolerate engine vibration and heat
• Consistent spark output to improve starting and idle stability
• Quality control to match OEM electrical characteristics

How do I confirm this is the right coil for my machine?

Before purchasing, identify the OEM part number on your current coil and inspect the connector to ensure it’s the 4-prong style listed. Cross-reference your engine or equipment model against the compatibility list and, if in doubt, compare mounting holes and lead length to your existing coil.

• Check your current coil for part numbers like 30500-Z5T-003 or 30500-Z5R-003
• Confirm your engine model (GX340, GX390 variants) or generator series
• Verify the connector style is a 4-prong plug
• Measure bolt spacing and lead reach if your machine has custom brackets

Who is this for: This Annolai ignition coil suits mechanics, equipment owners, and small-engine technicians who need a reliable, OEM-compatible replacement for Honda GX340 and GX390 ignition systems. It’s ideal for restoring proper ignition on generators, construction gear, lawn and garden machines, and other equipment that use the listed Honda models—especially when you want an easy, direct-fit swap without electrical modification.