YAMAKATO Spark Plug Replacements M14×1.25 3-Pack — 19mm Reach, 20.8mm Hex for Small Engines

YAMAKATO spark plugs are a 3-piece high-value replacement set engineered to fit many small engines and portable generators, supplied with free Teflon tape for a reliable seal.

This compact three-pack gives you direct-fit spark plug replacements sized M14×1.25 with a 19mm thread reach and a 20.8mm hex—designed for consumer lawn equipment, mini bikes, go-karts, pressure washers and a wide range of portable generators. The kit is compatible with multiple OEM references (NGK BPR6ES, BP6ES, Champion RN9YC and others), so you can replace worn or fouled plugs quickly without hunting for obscure part numbers.

Which engines and equipment does this set fit?

These plugs work across many small-engine families from common manufacturers and aftermarket brands. They match thread size and reach for popular Honda GX-series engines plus a broad list of generators, pumps and utility machines.

• Honda GX120 / GX160 / GX200 / GX240 / GX270 / GX340 / GX390 families
• Generators: 3000–9500W models including GP/GP-series and common portable generators
• Lawn mowers, pressure washers, water pumps, air compressors, mini bikes and go-karts
• Compatible references: NGK BPR6ES/BP6ES, Champion RN9YC, Torch F6TC/F6RTC and several OEM codes

How easy is installation and what tools do I need?

Installation is straightforward for anyone familiar with small-engine maintenance: remove the old plug, check the gap if desired, thread the new plug by hand and tighten with a 20.8mm socket. The included Teflon tape helps ensure a good seal if your engine’s threads need it.

• Hand-start threading recommended to avoid cross-threading
• Tighten with a 20.8mm socket or wrench to manufacturer torque specs
• Use the free Teflon tape when thread sealing is necessary
• Verify electrode gap if your engine maker specifies a setting

What are the technical details and what’s included in the pack?

Each pack contains three spark plugs plus a roll of Teflon tape for sealing. The plugs feature the common M14×1.25 thread pitch and a 19mm thread length, making them suitable for the majority of small gasoline engines that use this standard size.

• Quantity: 3 spark plugs per pack with Teflon tape
• Thread: M14×1.25, reach 19mm; hex size 20.8mm
• Cross-compatible with many NGK, Champion, Denso, Autolite references
• Intended for routine replacement and maintenance intervals

Will these plugs match OEM performance and part numbers?

These YAMAKATO plugs are manufactured to match physical fit and functional requirements for many OEM part numbers, simplifying repairs when original parts are hard to source. They are offered as high-value replacements rather than brand-original units, so verify compatibility with your equipment’s manual before installation.

• Matches many OEM references: NGK BPR6ES/BP6ES, Champion RN9YC and more
• Suitable as replacement for common small-engine applications
• Check your engine manual for electrode gap and torque specs
• Sold as a cost-effective multi-pack for routine service

Who is this for: This three-pack is aimed at DIYers, landscapers, rental operators and fleet managers who service small engines regularly and need a dependable, affordable replacement option. It’s especially useful for owners of Honda GX-series engines, portable generators, pressure washers, go-karts and other gasoline-powered equipment that accept M14×1.25 plugs.