NGK BPR5ES Spark Plug – 6578 | OEM Replacement for Honda & Small Engines

The NGK BPR5ES Spark Plug (6578) is a high-performance, OEM-quality spark plug engineered to provide reliable ignition, cleaner combustion, and superior durability in small engine applications.

Built with NGK’s proven copper core technology, the BPR5ES 6578 ensures excellent heat dissipation, preventing fouling and delivering consistent spark under all conditions. Ideal for Honda GX-series engines, pressure washers, soft wash systems, generators, and lawn equipment, this spark plug helps your engine start easier, run smoother, and last longer.

Features & Specifications:

• Manufacturer: NGK

• Part Number: 6578

• Model: BPR5ES

• Thread Size: 14mm

• Hex Size: 13/16" (21mm)

• Reach: 19mm (3/4")

• Seat Type: Gasket

• Gap: 0.028"–0.031" (0.7–0.8mm)

• Resistor Type: Yes

• Core Material: Copper for optimal conductivity

• Applications: Compatible with Honda GX120, GX160, GX200, GX240, GX270, GX340, GX390, and other small engines used in pressure washers, softwash rigs, and outdoor power equipment

Benefits:

• OEM fit and quality for dependable performance

• Provides quick, consistent engine starts

• Enhances fuel efficiency and combustion

• Resists fouling, corrosion, and electrode wear

• Easy to install, long service life

Trusted by professionals worldwide, the NGK BPR5ES (6578) spark plug is built to deliver unmatched ignition reliability and performance for your Honda-powered equipment.