The Isuzu 4LE2X is a 2.2-liter, 4-cylinder inline 4 diesel engine used in commercial and industrial generator applications in the 32.4-40 kW class. Turbocharged for reliable power density across standby and prime-rated duty cycles.
This engine powers generators from Airman, Atlas Copco, Echo, Hipower Systems, MQ Power, making it one of the more widely deployed prime movers in its power class for the commercial standby market.
Generator models that ship with or are commonly paired with the Isuzu 4LE2X.
Airman
Airman SDG45
0.001% warranty claim rate, 110% fluid containment standard, 28.75-hr runtime at 36 kW — premium Japanese precision at the sweet spot for mid-size commercial portable power.
39 kW standby · Diesel · Liquid-cooled
Mid-size 36 kW portable for commercial construction, large event power, and temporary building services where 20 kW is not enough and 50 kW is oversized.
36 kW prime diesel portable generator. Isuzu 4LE2X engine with 28.75-hour runtime and 110% fluid containment standard.
Tier 4 Final3-phaseconstructionrental-fleet
Airman
Airman SDG45SV V-Pump
Industry-leading 0.001% warranty claim rate with 110% fluid containment standard — no separate secondary containment needed on CA sites.
39 kW standby · Diesel · Liquid-cooled
Rental fleets and construction sites requiring ultra-reliability and environmental compliance.
45 kVA (36 kW prime) portable diesel generator with integrated VFD for motor starting and dewatering.
Tier 4 Final3-phaseconstructionrental-fleet
Echo
Echo DGK36FS
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
40 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
36 kW single-phase portable diesel generator with SimulPhase technology.
Tier 4 FinalSingle-phaseconstructionrental-fleet
Echo
Echo DGK45F
Patented SimulPhase — simultaneous single and three-phase output from one unit, eliminating step-down transformers on mixed-load sites.
40 kW standby · Diesel · Liquid-cooled
Mixed-load construction sites where SimulPhase eliminates transformer cost, and rental fleets discovering Shindaiwa heritage.
45 kVA portable diesel generator with SimulPhase technology. Built in Japan.
Tier 4 Final3-phaseconstructionrental-fleet
Hipower Systems
Hipower HRIW-45
Isuzu-powered trailer generators — compact, fuel-efficient, and Tier 4 Final for California rental fleets.
40 kW standby · Diesel · Liquid-cooled
Construction sites, outdoor events, and rental fleet applications needing 40 kW of mobile diesel power.
45 kVA (40 kW standby) mobile diesel generator with Isuzu engine. Tier 4 Final. Trailer-mounted rental unit for construction and outdoor events.
Tier 4 Final3-phaseconstructionrental-fleet
MQ Power
MQ Power DCA-45 WhisperWatt
WhisperWatt 45 kVA — 66 dBA at 7m, Isuzu 4LE2X 2.93L, no DEF required (DPF+EGR only), switchable phase output, 79-gal tank.
40 kW standby · Diesel · Liquid-cooled
Mid-size portable at 36 kW prime. Diesel at 2.93 gph, no DEF logistics, construction and events up to 36 kW.
45 kVA (36 kW prime) portable diesel generator. Compact WhisperWatt Super-Silent for construction sites, events, and commercial temporary power.
Tier 4 Final3-phaseconstruction-largerental-fleet
Winco
Winco DE40I4
100% US-made diesel standby with Stamford alternator and non-proprietary engines — serviceable by anyone, not locked to a dealer network.
36 kW standby · Diesel · Liquid-cooled
Cost-conscious commercial/institutional standby where Buy American and component independence matter.
36 kW standby diesel generator with Isuzu 4LE2X turbocharged engine. Tier 4 Final. Largest DE series unit. US-made.
Tier 4 Final3-phasecommercial-standby
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