generator - black soot out exhaust (diesel)
my diesel generator is putting out a black soot onto whereever the exhaust pipe is pointed. when camping it leaves a black circle on the ground. if parked at home on the street to colors the curb b...
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Rollnhome wrote:Roman Duck wrote:
On Onan diesels generators there is a plug on the exhaust that needs to be removed periodically.
Allow the generator to run for about 30 mins. after it warms up remove the blow out plug and run under full load for about 10 to 15 mins. Doing this will blow out the accumulated soot that has collected in the exhaust. It will eliminate the soot condition, your experiencing, and allow the generator to run more efficient.
Also maintain a good air filter.
Sometimes the plug is hard to see/get to.
A 3/8 Drive extension works well in removal. hint when doing this, first loosen the plug while unit is cool(after loosening keep the plug in until ready for removal)Doing so will keep your arm/hand from getting a nasty burn trying to loosen it up when hot
If it's a front mounted unit(as on DPs)then care should be exercised in running the generator while driving in the rain, as this can lead to sucking in water through the air filter.
Good luck and if you resolve it please post the outcome
The spark arrestor collects soot and needs to be purged. However my Onan owners manual (8KW) says to remove the plug. Start engine and let run 5 minutes or longer. Shut off engine let muffler cool then replace plug.
This clears the soot out of the muffler/spark arrestor. May solve you problem.
X2 That's what I said, just in a lot less words
