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Liquid-Cooled engines will last several times the hours of air-cooled models. All Winco liquid-cooled generators operate at 1,800 rpm improving life and fuel economy. The GM Vortec industrial engines start quickly in an emergency and with electronic fuel and governor controls your standby generator will meet the most stringent generator standards. The emergency generators are outfitted with sophisticated safety controls that protect your emergency generator and home from damage. The control constantly monitors engine and electrical inputs and outputs to make sure everything is performing to standards. If a dangerous condition occurs, the generator will automatically shut itself off. The best part is that there isn't any guessing. The generator provides error codes with vital diagnostic information. Winco liquid-cooled generators are normally available from inventory from 21 - 90 kilowatts.

A key part of any generator is the fuel system. If the engine is starved or flooded, the governor is unable to maintain the proper speed resulting in large voltage and frequency variations. The WINCO PSS90 and all other WINCO emergency standby generator models include industrial features to ensure that your emergency generator will start and perform to specification when your family or business needs it. To control the fuel supply and prevent dangerous fuel leaks WINCO utilizes dual ASCO normally closed solenoids. WINCO uses ASCO valves designed to properly operate in cold temperatures to increase generator reliability. The GM engines include a dynamically controlled valve and fuel mixer that ensures the ideal fuel to air ratio is always achieved to maximize performance while minimizing emissions. The engines also include electronic governors capable of quickly and accurately adjusting the engine speed to maintain the most consistent electrical output possible through a wide range of load conditions.


Model Year
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Engine Make
Engine Model
Engine Type
5.7L TAC
Fuel Type
NG / LP gas field selectable
Fuel Consumption
12.4 gph LP


DC Voltage
120 / 240 1-PH
120 / 208 3-PH
120 / 240 3-PH
277 / 480 3-PH
Maximum AC Output
90 kW
480V NG


2,750 lbs. shipping

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*Price, if shown, is Manufacturer's Suggested Retail Price (MSRP) and does not include government fees, taxes, dealer freight/preparation, dealer document preparation charges or any finance charges (if applicable). MSRP and/or final actual sales price will vary depending on options or accessories selected.