Cummins M-series engine

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The Cummins M-series engine is a straight-six diesel engine designed and produced by Cummins. It displaces 10.8 litre. Introduced as the M11 in 1994, it was built on the previous L10 engine (same 4.921 in cylinder bore, but a longer 5.787 in piston stroke compared to the L10's 5.354 in stroke). Later M11's received the electronic CELECT and CELECT Plus fuel systems consisting of a gear pump and solenoid controlled injectors. The M11 CELECT Plus became the ISM when Cummins applied its Interact System (hence the "IS" in ISM) to the M11 CELECT Plus in 1998 to further improve the engine. The ISM is available in four configurations, with slightly-different emphasis on maximum power (450 hp vs. 500 hp) and peak torque.

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