Cummins/Onan — Cleaning the Spark Arrestor Muffler
Maintenance · Spark arrestor muffler cleanout plug
From a Cummins/Onan owner's manual covering: E124V, E125, E140, Miller P216, Miller P218, Miller P220, Miller P224, P218, P220, P248. Check it applies to your exact model before use.
Applies to: Cummins/Onan E124V, Cummins/Onan E125, Cummins/Onan E140, Cummins/Onan HGJAA, Cummins/Onan HGJAB, Cummins/Onan HGJAC
Before you start
- A hot muffler can cause severe burns
Procedure
- Let the muffler cool down.
- Remove the cleanout plug from the bottom of the muffler.
- Restart the genset and load it nearly to full power for about five minutes.
- Stop the genset, allow the muffler to cool, then reinstall the plug.
Full service-parts list: Cummins/Onan E124V →, Cummins/Onan HGJAA →, Cummins/Onan HGJAB →, Cummins/Onan HGJAC →
Source: Cummins/Onan owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.