Case C12000ES - User Manual

Questions and Answers

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Derek MillerAug 10, 2025
What to do if my Case Portable Generator engine will not start, or starts and then runs poorly?
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  Linda RichardsAug 10, 2025
  If your Case Portable Generator engine won't start or runs poorly, several factors could be the cause. First, ensure the fuel shut-off is in the 'ON' position. Check and clean or replace the air filter if it's dirty. Make sure the fuel tank has gasoline, and if the gasoline is stale, drain and refill with fresh fuel. Ensure the spark plugs are connected and in good condition—replace them if necessary. Also, check for water in the gasoline and drain if needed. If the engine is over-choking, adjust the choke. Finally, verify the oil level is adequate, and add oil if it's low.
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Charles PinedaAug 15, 2025
Why is my Case C12000ES Portable Generator engine running, but there is no AC output available?
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  Christie MasonAug 15, 2025
  If your Case Portable Generator's engine is running but there's no AC output, it could be due to several reasons. First, check if the circuit breaker is open and reset it. Inspect the cords for poor connections or defects and repair them. Ensure the connected device is functioning correctly by testing with another device. Also, verify the ground connections in case the GFCI on the control panel has tripped. If none of these steps resolve the issue, there may be a fault in the generator, and you should contact an authorized service facility.
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Laura DavisAug 19, 2025
What to do if my Case Portable Generator engine shuts down during operation?
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  colton73Aug 19, 2025
  If your Case Portable Generator engine shuts down during operation, it might be due to a few reasons: the fuel may have run out, so refill the fuel tank. Another cause might be a dirty air filter, which you should clean or replace. If neither of these solutions work, there may be a fault in the engine, and you should contact an authorized service facility.
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David UnderwoodAug 25, 2025
Why does my Case C12000ES Portable Generator engine run well but slow down when loads are connected?
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  Erica Logan DDSAug 25, 2025
  If your Case Portable Generator engine runs well initially but slows down when loads are connected, it could be due to a short circuit in a connected load, so disconnect the shorted electrical load. Another possibility is that the generator is overloaded. In this case, consult the “Overloading Generator” section. It may also be due to the engine speed being too slow or a shorted generator circuit, in which case you should contact an authorized service facility.
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Denise MoranAug 30, 2025
Why does my Case C12000ES Portable Generator engine lack power?
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  Gary GuerreroAug 30, 2025
  If your Case Portable Generator engine lacks power, the load may be too high, so try reducing it. Another potential cause is a dirty air filter, which should be cleaned or replaced. If these steps don't improve the power, the engine may need to be serviced by an authorized service facility.
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pereztammySep 3, 2025
What to do if my Case Portable Generator engine falters?
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  Erin MillsSep 3, 2025
  If your Case Portable Generator engine falters, it could be because the choke is opened too soon. Try moving the choke to the halfway position until the engine runs smoothly. Alternatively, the carburetor might be running too rich or too lean, which requires attention from an authorized service facility.

Case C12000ES Specifications

General

Engine Type	4-stroke OHV
Engine Displacement	713 cc
Starting System	Electric/Recoil
Weight	260 lbs
Power Output	12000 watts
Outlet Types	4 x 120V 20A, 1 x 120V/240V 30A, 1 x 120V/240V 50A
Noise Level	74 dBA at 23 ft

Case C12000ES - User Manual

Table of Contents

Questions and Answers

Case C12000ES Specifications