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NT/NTA855, 6BTA5.9-F1/F2/F4 and 6CTA8.3-F1/F2/F3 engines are pre-EPA emission certified engines with a high Bosch number for smoke. If the engine has been properly maintained, the smoke is probably normal.

The prior engine's cooling loop may NOT be reused after December 2013. Since then, we have been required by Factory Mutual to supply an FM-approved cooling loop that is certified for the specific engine model. Without the FM-approved cooling loop, the engine cannot be FM-approved. Cummins offers cooling loops suitable for fresh water and salt water. We provide an electric shut-off valve for horizontal split case pump applications.

Some of Cummins offerings are speed-rated. A speed-rated engine is certified at any RPM between two listed points. This information is on the engine data sheets. Otherwise, the engine RPM can only be adjusted + / - 10 RPM.

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