Industrial Spark Plug R1B12-75

Takumi Industrial Spark Plug R1B12-75 (Replacement RB75N)

The Takumi R1B12-75 Industrial Spark Plug is a high-performance replacement for Champion RB75N (RB75N / 30002064 equivalent applications), designed for reliable ignition in heavy-duty gas engines used in power generation and industrial operations.

It is widely compatible with major engine brands such as Caterpillar, Cummins, Waukesha, and Guascor, ensuring stable combustion performance in continuous-duty applications.

Key Features

• Direct replacement for Champion RB75N type industrial spark plug
• Suitable for gas engines used in generator sets and CHP systems
• High resistance to heat, pressure, and combustion stress
• Stable ignition performance under continuous operation
• Multi-electrode design for improved combustion efficiency
• Long service life and reduced maintenance intervals
• Resistor-type design for improved ignition stability and reduced electrical noise

Technical Overview

• Model: R1B12-75
• Thread: M18 × 1.5
• Reach: ~20.5–20.9 mm (depending on variant)
• Hex size: 22.2 mm
• Electrode type: Multi-ground electrode (typical 4-electrode design)
• Heat range: Industrial gas engine specification
• Application type: Stationary gas generator engines

Engine Compatibility

The R1B12-75 / RB75N replacement is commonly used in:

• Caterpillar G3500 / G3600 series gas engines
• Cummins QSV / Q19G series
• Waukesha VHP / AT / VGF series
• Guascor FGLD / FG series
• Other industrial gas generator sets

Applications

• Gas power generation plants
• Biogas and landfill gas engines
• Combined Heat & Power (CHP) systems
• Industrial stationary generator sets
• Continuous-duty engine operations