I have a fairly new DR Trimmer with a Briggs ex675 motor. I didn't empty the gas over winter. The nit wouldn't start. I bought a new carburetor and installed it. The mower started right up but it doesn't run smooth, it lopes. What is wrong?
Loping or throttle surging is normally caused by a dirty carb that has idle passage in the carb clogged. If you engage the trimmer head does the loping go away or no different
With a new aftermarket carburetor, and the engine is hunting and surging, it is running lean (not enough fuel). The air/fuel mixture ratio is not right. Best thing you can do in this case is completely clean the original OEM carburetor and reinstall.I will look at these things tomorrow, thanks. Is there something besides spraying the carburetor with cleaner can I do to the original carburetor?
And just to add to Tiger if it is the carb with the metal fuel bowl, don't figure the bowl nut because that is were the main carb jet is located.With a new aftermarket carburetor, and the engine is hunting and surging, it is running lean (not enough fuel). The air/fuel mixture ratio is not right. Best thing you can do in this case is completely clean the original OEM carburetor and reinstall.