Cummins/Onan EH41DS Engine
The Cummins/Onan EH41DS is a 0.4 L forced air-cooled engine, producing up to 7.3 kW. It powers generator sets from Cummins/Onan, including the PX7500.
Also known as: Cummins Onan EH41DS
Engine specifications
| Displacement | 0.404 L |
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| Aspiration | Forced air-cooled |
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| Gross power | 7 kW |
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Common problems
11- No electricity is generated at receptacle — loose connection at AC receptacle or DC terminals
Cause: AC receptacle and DC terminals have loose connection
Fix: Secure connection if necessary - No electricity is generated at receptacle — engine starting attempted with appliances already connected
Cause: Engine starting was attempted with appliances already connected to generator
Fix: Turn off switch on the appliance, and disconnect cable from receptacle; Reconnect after generator has been started properly - No electricity is generated at receptacle — AC circuit breaker not in the "ON" position
Cause: AC circuit breaker is not in the "ON" position
Fix: After making sure that the total wattage of the electrical appliance is within permissible limits and there are no defects in the appliance, turn the AC circuit breaker to the "ON" position; If breakers continue to actuate, consult your nearest servicing dealer - Low power
Cause: Carbon brushes are excessively worn
Fix: Check the brush every 500 hours or if generator performance is irregular; If the brush is 5 mm long or less, replace it with a new one - Engine fails to start — loose spark plug cap
Cause: Spark plug cap is loose
Fix: If loose, push spark plug cap back into place - Engine fails to start — generator connected to an appliance
Cause: Generator is connected to an appliance
Fix: If connected, turn off the power switch on the connected appliance and unplug - Engine fails to start — fuel level low
Cause: Fuel level is low
Fix: If empty, refill fuel tank making sure not to overfill - Engine fails to start — fuel cock closed
Cause: Fuel cock is closed
Fix: If closed, open fuel cock - Engine fails to start — engine switch in OFF
Cause: Engine switch is in OFF
Fix: Turn engine switch to ON - Engine fails to start — contaminated spark plug
Cause: Spark plug is contaminated
Fix: Remove spark plug and clean electrode - Engine fails to start — choke lever not in its proper position
Cause: Choke lever is not in its proper position
Fix: Set the choke lever to "CLOSE" position
Compiled from service & troubleshooting documentation across every generator set that uses the Cummins/Onan EH41DS.
Common questions
What is the displacement of the Cummins/Onan EH41DS?
The Cummins/Onan EH41DS has a displacement of 0.404 liters.
Which generators use the Cummins/Onan EH41DS engine?
The Cummins/Onan EH41DS powers 1 generator set(s), including Cummins/Onan PX7500.
What is a common problem with the Cummins/Onan EH41DS engine?
A commonly reported issue on generators using the Cummins/Onan EH41DS is: No electricity is generated at receptacle — loose connection at AC receptacle or DC terminals. Cause: AC receptacle and DC terminals have loose connection. Fix: Secure connection if necessary.