Is there a possibility the fuel in it could be stale?
Another thing to check for is to confirm the choke is disengaging properly.
Another thing to check for is to confirm the choke is disengaging properly.
It worked ok after changing the flywheel, correct?... I changed the flywheel back then, from light to heavy. Flywheel was direct from B&S.![]()
What happens if you hold the throttle plate from wiggling? Will it smooth out?.. I noticed that when running, the butterfly on the carb is moving back and forth the whole time when at idle...as if the governor is pushing/pulling rapidly the whole time.:dunno:
The bed rest with the sheet must have done the trick. :ROFLI am at a loss for words on this one. I left my 650 in the corner of my shop for over a week under an old sheet. I then put everything back together as before and the d*mn thing runs as it should, smooth with no backfiring.
Unfortunately we are seeing the same thing happening over here with a bit of a twist. Briggs for many years also used to make a great little engine here that would run for many years and put up with a lot of abuse. Anymore not so much. We lost Tecumseh, Briggs and I would also add Kohler are scrambling and have cheapened up the designs on all but the high end models. (I question at times if the high end models are not starting to suffer as well.) The Chinese have now firmly worked their cheaper engines into the lower horsepower lawnmower, tiller, snow blower, and generator market here. I figure it is only a matter of time before they start showing up in riding mowers and tractors. Quality of them seems really hit and miss. One guy reports he has over a 1000 hrs on one with no problems. Next guy reports he's draining the leftover from machining metal shavings out of the sump on the first oil change. :dunno:Briggs makes me crazy. They used to make great small engines over here in Germany. They were simple and almost indestructible (look up Berning DK-6). The companies here could not crank them out in the numbers that Briggs did or as cheaply. As is the case in many industries, cheap won out over quality.:soap: