Spark Plug Champion FB78WW, Champion FB78WW

Champion Bridge Iridium Spark Plug plug part number: FB78WW

The dual iridium electrodes combined with the Bridge design and patented advanced weld process provide more than 2 times the service like of traditional J-gap plugs.

Ideally suited for fuel-fed , large bore pre-chambers gas engines where high load and high temperatures operating conditions are prevalent. The fixed gap provided by the Bridge design does not move under extreme thermal cycling conditions like many standard j-gap plugs, eliminating the need for re-gapping procedures.

Fixed Electrode gap

Fully fixed Bridge electrode design prevents gap relaxation from occurring

High-alumina content insulator

High-durability ceramic leading to increased dielectric and mechanical strength

IFISS Technology

Maintains tight resistance window across varying voltages. Ideal for high load high temperature running applications

Hot lock Shell assembly

Maximizes the lock of the core assembly with the shell, reducing internal leakage and “lift and set” at high combustion pressures

Technical Specifications:

Thread size: M18 x 1,5 mm

Reach: 13/16" (20,6mm)

Hex size: 7/8" (22,2mm)

Gap: 0,011 (0,30mm)

Torque: 50 - 60 Nm

Cross References:

Champion/Federal Mogul: FB78WW

Motortech: MBP1800

Wartsila: PAAF092377

Rolls Royce: 710875, 707447 / FB11047A

ERS: FT00078, FT00085 (longest lasting plugs in the group, pre-chamber style)

Engine Application:

Caterpillar: 3520B, GCM 34

Rolls Royce Marine: B-gas engine

MAN: V35 / 44G

Wartsila: 34SG / 50SG / 20V34SG

HHI: H35 / 40GV