handirifle
Veteran Member
I have a Husky (Sears model) that I have owned for about 6 years now. I has been a strong mower (6.5HP B&S) and a real workhorse. I have had to go through the carb, due to crappy fuel, and had it running great. Now, however, it surges terribly when it runs. It's gotten very hard to start, without starting fluid. The surging is very odd. When running, it will run normal speed for 1-1.5 seconds, then die off momentarily, the repeat. I does it so bad, the last time I mowed, it sounded like a rod knocking. I have the blade of the bottom, cause I thought some of the drive mechanism was the source of the noise, but that is not so.
I have gone through the carb AGAIN and cleaned it, and blown all orifices clear, I think. It also backfires a bit as well. When manually operating the throttle, it will rev to max RPM and hold it, but still surging.
I have some theories, but not sure.
I have not replaced the rubber "O" ring between carb and motor, it seems OK, but wondering if an air leak might be my issue.
I also am wondering about the governor but that shouldn't cause a back fire I wouldn't think.
The plug was showing a very light color, indicating lean, thus the first theory.
I am not sure how that ignition system works so no theories on that one.
This surging is not minor either, it's almost violent at times.
Suggestions? Thanks
I have gone through the carb AGAIN and cleaned it, and blown all orifices clear, I think. It also backfires a bit as well. When manually operating the throttle, it will rev to max RPM and hold it, but still surging.
I have some theories, but not sure.
I have not replaced the rubber "O" ring between carb and motor, it seems OK, but wondering if an air leak might be my issue.
I also am wondering about the governor but that shouldn't cause a back fire I wouldn't think.
The plug was showing a very light color, indicating lean, thus the first theory.
I am not sure how that ignition system works so no theories on that one.
This surging is not minor either, it's almost violent at times.
Suggestions? Thanks