TAKUMI's factory advantage: advanced equipment, experienced engineers and a zero-defect mindset. Every plug is tested before it leaves the workshop.

Product Overview

TAKUMI R6GC1-77M spark plug is a form, fit and function equivalent replacement for OEM part X52404500049. TAKUMI R6GC1-77M industrial resistor spark plug for MTU 4000 gas engines. M18x1.5 thread, 0.3 mm gap, heat range 77.

Every TAKUMI unit is produced in an ISO 9001 and IATF 16949 certified factory, 100% tested before shipment. The plug is engineered for long service life in continuous operation, with a nickel-plated shell, copper-core electrode and high-grade ceramic insulator.

Key Specifications

• TAKUMI TypeR6GC1-77M
• Thread SizeM18 x 1.5
• Reach20.6 mm (13/16")
• Hex Size22.2 mm (7/8")
• Seat TypeFlat
• Spark Gap0.3 mm
• Heat Range77
• Electrode TypeIridium / Nickel
• ResistorYes

Cross Reference

• MTUX52404500049 / X52404500056 / X52404500062 / X52404500050 / X52404500052 / X52404500027 / X52404500039
• MDE70700180049
• Federal Mogul / BERU0004.800.986.00.07 / 18VGZ1-77
• TennecoFB95WPV / FB95PPV
• MotortechMPC1800 / MPC1900
• C-A-T0346-5123

Applications

• MTU 4000 series (16V4000-L61 / L62 / L63 / L62FB)
• Gas gensets, marine and industrial engines

Advantages

• Drop-in replacement - no engine parameter changes required
• Reliable ignition under high pressure and lean combustion
• Anti-corrosion nickel-plated housing
• 95% alumina insulator for heat and shock resistance
• Monolithic resistor for stable conductivity
• Factory direct with competitive pricing and short lead time

OE numbers are for reference only. Final fitment should be confirmed before ordering.

Factory & Quality Control

In our quality laboratory, every production batch is inspected with precision gauges, high-voltage spark testers and sealing equipment before packing.

Production Workshop

TAKUMI runs a fully integrated manufacturing base: CNC machining, automated assembly and 100% functional testing under one roof.

From raw material to finished spark plug, every process is controlled in-house with ISO-certified procedures.