Cummins / Complete Engine Cummins/ Komatsu/ Weichai / ISC, ISL, QSC, QSL / CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine
CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine

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CPL3309 DCEC ISL CM2150 Euro 4 ISL340 ISLE340-40 ISL290 ISL8.9 Cummins ISLE Engine

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The 8.9-liter ISL G has met EPA 2010 emissions standards since 2007 using Stoichiometric cooled-Exhaust Gas Recirculation (SEGR) spark-ignited combustion to create a high-performance natural gas engine.
  • ISL340 ISLe340-40 ISL290 ISL8.9

  • Cummins

  • CPL3309 87741666

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Cummins ISL8.9 Engine Overview


Every Alternative:  Cummins Westport ISL G


The 8.9-liter ISL G has met EPA 2010 emissions standards since 2007 using Stoichiometric cooled-Exhaust Gas Recirculation (SEGR) spark-ignited combustion to create a high-performance natural gas engine.  Torque at idle and fuel economy are improved versus lean-burn engines by 30% and 5%, respectively.

Cooled EGR, in combination with stoichiometric combustion (the theoretical or ideal combustion process in which fuel and oxygen are completely consumed), creates an oxygen-free exhaust, which allows for the use of Three-Way Catalyst (TWC) aftertreatment.  TWCs are effective, simple, passive devices that are packaged as a muffler and are maintenance-free.  The ISL G does not require active aftertreatment such as DPFs or SCR.


The Natural Alternative.


The ISL G is rugged and reliable because it shares many components and parts with Cummins L Series diesels and is built on the same assembly line as Cummins diesels.  A wastegated turbocharger with electronic control for precise air handling and full drive-by-wire throttle control provide impressive diesel-like performance.


A new ECM provides full monitoring and control of engine sensors, fuel system and ignition system.  The ECM provides full interface capability to Cummins INSITE™ and diagnostic service tools.  It also provides Original Equipment Manufacturers (OEMs) and end users with the ability to tailor performance of the engine to fit the vehicle mission.


Considering a Cummins engine purchase?Check with Qingbang Online Service.


Cummins ISL8.9 Engine Ratings


Engine ModelAdvertised hp (kW)Peak Torque lb-ft (N•m) @ rpmGoverned Speed
ISL G 320320 (239)1000 (1356) @ 13002200 rpm
ISL G 300300 (224)860 (1166) @ 13002200 rpm
ISL G 280280 (209)900 (1220) @ 13002200 rpm
ISL G 250250 (186) 730 (990)  @ 13002200 rpm


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