2001/09/01 Caterpillar

Caterpillar No Longer Recommends The Use Of 195-6071 Spark Plugs Or 195-6353 Spark Plugs On G3300 Engines Or G3400 Engines {1555}

Usage:

G3306 07Y

Engines: G3304 (S/N: 37Y) G3306 (S/N: 07Y) G3406 (S/N: 4FD; 1RK) G3408 (S/N: 6NB; 6RJ) G3408C (S/N: 3WR; 8YR; BAZ) G3412 (S/N: 7DB; 3NK) G3412C (S/N: 6ZM; 5KR)

Reference: Engine News, SEBD9298, June 2001, "Guidelines For Maintenance Of Spark Plugs In Gas Engines"

Caterpillar no longer recommends the use of 195-6071 Spark Plugs Or 195-6353 Spark Plugs in the engines that are listed above. The use of these spark plugs may result in an engine misfire after a short period of operation.

The recommended spark plug for the G3300 Engines is the 2N-2839 Spark Plug. The plug gaps should be set at 0.64 ± 0.038 mm (0.025 ± 0.0015 inch).

The recommended spark plugs for the G3400 Engines follow: the 2N-2839 Spark Plug, the 104-3170 Spark Plug and the 128-6238 Spark Plug. The plug gaps for the 2N-2839 Spark Plug should be set at 0.64 ± 0.038 mm (0.025 ± 0.0015 inch). The plug gap for the 104-3170 Spark Plug or the 128-6238 Spark Plug should be set at 0.28 ± 0.038 mm (0.011 ± 0.0015 inch) for low emissions applications that use a high compression ratio. The plug gap should be set at 0.41 ± 0.038 mm (0.016 ± 0.0015 inch) for all other applications.

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