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My mower is running rough, it starts out good, but after 30-40 mins runs rougher, particularly after putting it in reverse. I have put new fuel in. Seems like an electronic issue? Spark plug? Any ideas appreciated.

Check air filters, fuel filter, then spark plugs, replace all if necessary.




Small Engine Problems Troubleshooting and Repair | Briggs & Stratton

Thanks Mark. I checked all these. New plugs, cleaned air filter. It seems the oil was overfilled, wont start now. next steps?

billwhitbeck said:

Thanks Mark. I checked all these. New plugs, cleaned air filter. It seems the oil was overfilled, wont start now. next steps?

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Please give me information for Conquest: year, model #, all engine numbers, and hours on hour meter, Thanks


http://www.briggsandstratton.com/us/en/support/faqs/how-do-i-troubleshoot-poor-engine-performance