Cummins/Onan — Cleaning the Spark Arrestor
Maintenance
From a Cummins/Onan operator's manual covering: 2.0 KY, 2.5 KY, 2.8 KY, 2.8KVFA26100K. Check it applies to your exact model before use.
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Before you start
- A hot muffler can cause severe burns.
Procedure
- Let the muffler cool down before removing the spark arrestor screen.
- Loosen the U-bolt clamp that secures the tailpipe to the muffler and move the tailpipe aside.
- Remove the screw that secures the spark arrestor tube/screen inside the muffler outlet.
- Remove the spark arrestor tube and inspect the screen inside for damage and clogging; replace if damaged.
- Lightly tap the spark arrestor and remove remaining deposits with a wire brush; use a commercial solvent to loosen hard deposits.
- Reinstall the spark arrestor and tail pipe.
Tools required
- wire brush Amazon
Tool links are Amazon searches (affiliate links); manufacturer special tools may only be available from a dealer.
Source: Cummins/Onan operator'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.