Type: It's a Double Iridium spark plug. This means both the center
electrode and the ground electrode are tipped with iridium alloy.
Benefits: Double Iridium construction provides:
Extended Service Life: Significantly longer lifespan compared to
conventional nickel or even single platinum/iridium plugs, reducing
maintenance intervals.
Reliable Ignition: Offers consistent and reliable ignition performance
under the high pressure, high temperature, and often lean-burn
conditions found in industrial gas engines.
Improved Efficiency: Contributes to stable combustion and optimal
engine efficiency.
Design: Typically features an M18 thread (M18x1.5mm), common in many
large industrial gas engines.
Applications: The Bosch 7308 is widely used and often specified for
various industrial gas engines, most notably:
MWM (Caterpillar Energy Solutions / formerly Deutz Power Systems):
Very common in many MWM TCG series engines.
Caterpillar (CAT): Used in numerous Caterpillar CG series gas
engines.
Perkins: Found in certain Perkins gas engine models.
Other Engines: May be suitable for other stationary gas engines
requiring an M18 Double Iridium plug with the appropriate heat
range.
Regarding Jenbacher: While Bosch supplies spark plugs used in
Jenbacher engines (like the Bosch 7305, 7306, or others U5859625
depending on the specific Jenbacher model and gas type), the Bosch
7308 is less commonly listed as a standard, primary replacement for
most Jenbacher applications compared to its strong association with
MWM MAN CAT engines. However, suitability always depends on the
specific engine model, fuel gas composition, and potentially operator
preference or tuning adjustments.
In summary, the Bosch 7308 is a premium, long-life Double Iridium
industrial spark plug primarily targeted at MAN MWM and Caterpillar
gas engines, known for its durability and reliable performance.