YAMAKATO GXV610 GXV620 Ignition Coil Set for Honda V-twin Engines — Left & Right Coils with Air-Gap Gauge

YAMAKATO’s GXV610/GXV620 ignition coil set replaces both left and right coils for affected Honda and compatible V-twin engines and includes an air-gap gauge for correct installation.

If your GXV610, GXV620 or similar V-twin engine is misfiring, hard to start, or has poor spark timing, worn ignition coils are a common culprit. This YAMAKATO kit supplies two high-quality coil assemblies designed to match OEM mounting and electrical connections for a range of mower, tractor and generator applications. The package lists compatible part numbers and includes an air-gap tool so you can set the coil gap to specification before first use.

Which engines and machines will this coil set fit?

These coils are built to replace the left and right ignition coils on several Honda GX series engines and many compatible aftermarket engines. They fit GXV610, GXV620 and GXV670 V-twin platforms and are commonly used in commercial mowers, garden tractors and portable generators.

• Compatible with Honda GX 610 (18 HP), GX 620 (20 HP), GX 670 (24 HP)
• Fits mower models HRC7018, HRC7020 and related tractor and generator units
• Works with Predator/Rato 670cc generator engines on certain RP/12000-class units
• Cross-references many OEM numbers listed in the product details

How do I confirm these coils will replace my current parts?

Before ordering, compare the physical mounting, the stop-wire orientation and the electrical connector locations to your existing coils. There are multiple coil designs for the same engine families, so visual confirmation prevents purchasing the wrong type.

• Compare mounting hole spacing and overall coil footprint
• Check stop wire terminal orientation against product photos
• Verify the listed replacement part numbers match your OEM references

What comes in the YAMAKATO coil kit and how do I install it?

The kit includes one left coil, one right coil and an air-gap gauge to set the correct distance between coil and flywheel. Installation follows standard ignition coil replacement procedures: disconnect battery, remove old coils, set the new coil in place, adjust the air gap and secure wiring as shown in your service manual.

• Includes: 1x left coil assembly, 1x right coil assembly, 1x air-gap gauge
• Air-gap tool helps achieve correct specification for consistent spark
• Use OEM torque specs and double-check stop-wire routing before starting engine

Are there any compatibility cautions or exceptions?

Yes. Not every GXV610/GXV620 engine uses the same coil type; one specific variant (30550-ZJ1-023) is different and is not compatible with this kit. Inspect the product images and measure mounting dimensions if you have any doubt about match-up.

• NOT compatible with part number 30550-ZJ1-023
• Double-check mounting size and connector orientation before purchase
• If unsure, compare photos and OEM numbers from your engine's service manual

Who is this for: This YAMAKATO ignition coil set is intended for mechanics, landscapers and do-it-yourself owners who maintain Honda GX-series and compatible V-twin engines on commercial mowers, tractors and portable generators. It’s best for users who can safely perform ignition work or who have access to basic tools and a service manual; the included air-gap gauge makes it suitable for accurate setup and reliable engine performance after replacement.