YAMAKATO Ignition Coil Set for GXV610/GXV620 V‑Twin Engines — Left & Right Coils with Air Gap Gauge

YAMAKATO replacement ignition coil set for GXV610/GXV620-series V‑twin engines provides both left and right coil assemblies plus an air gap gauge for correct installation.

This pair of ignition coils is designed as a direct-fit replacement for many small V‑twin engines used on mowers, tractors and portable generators. The kit includes two coil assemblies (left and right) and a simple air gap gauge to help you set the proper distance between the coil face and flywheel. It’s intended for several Honda GX and GXV variants as well as compatible aftermarket engines—double-check mounting holes and the stop-wire orientation before you buy.

Which engines and machines will these coils fit?

The coils are made to match Honda GXV610, GXV620 and some GXV670 V‑twin engines as fitted to commercial mowing equipment and generators. They also list compatibility with select Predator/Rato 670cc engines used in high‑output generators. Verify your engine’s part numbering and mounting layout to ensure compatibility.

• Fits Honda GX 610 (18 HP), GX 620 (20 HP), GX 670 (24 HP) V‑twin applications
• Used in mower models like HA4118, HA4120 and HRC7018 / HRC7020
• Compatible with certain generator models including EB11000 and RP12000E
• Works with Predator/Rato 670cc engines used in 11000–13500 and 12000 watt generators

Are these coils exact replacements for OEM numbers?

The set is intended to replace several OEM and aftermarket part numbers, but it is not a universal match for every variant. Confirm your original coil’s part number and the orientation of the stop‑wire connector since some coils for the same engine family have different terminal layouts.

• Replaces multiple numbers: 30500‑ZJ1‑013, 30500‑ZJ1‑023, 30500‑ZJ1‑845 and related variants
• Also listed as substitute for 30550‑ZJ1‑013, 30550‑ZJ1‑845 and similar codes
• Important: NOT compatible with part 30550‑ZJ1‑023—check images and mounting geometry
• Compare hole spacing and stop‑wire direction before purchasing

What comes in the package and how do I set it up?

The kit contains one left coil, one right coil and an air gap gauge to assist in precise installation. Use the gauge to establish the manufacturer‑recommended spacing between the coil face and flywheel magnet; tightening and routing of the stop wire should match the original layout to maintain the kill‑switch function.

• Contents: 1× left coil assembly, 1× right coil assembly, 1× air gap gauge
• Set the air gap with the supplied gauge before final mounting
• Ensure stop‑wire connector orientation replicates the factory part
• Torque and mounting hardware should follow engine manufacturer specs

How durable and reliable are these replacement coils?

These coils are built for routine engine use and replacement cycles in power equipment, offering standard durability for ignition components. They are not a lifetime part; inspect the coils and wiring periodically for heat or vibration damage, and replace them if insulation cracks or electrical performance degrades.

• Designed for V‑twin small engine service environments
• Use existing mounting brackets and fasteners unless damaged
• Check insulation and connector condition during routine maintenance
• Replace both coils at the same time for balanced ignition timing

Who is this for: This YAMAKATO coil set is aimed at mechanics, landscapers and DIYers who maintain Honda GX/GXV V‑twin engines or compatible aftermarket machines and need an economical, serviceable replacement. It’s best for those comfortable verifying part numbers and measuring mounting and stop‑wire orientation before installation.