Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Hello. Thank you for choosing Just Answer. My name is***** will be happy to assist you. How long has it been since your engine last performed to your satisfaction?
The reason your engine speed is rising and falling, is because of surging, due to your carburetor starving for fuel.
How old is the gas you have inside your gas tank?
Do you have a Home Depot, or Tractor Supply in your area?
Mechanic In A Bottle - Click Here
There is a fuel treatment called Mechanic In A Bottle. This product works really well, the majority of the time.
I have seen it at Tractor Supply co., and at Home Depot.
I would completely drain the old gas from your gas tank, if possible, and start with fresh gas. I would add the Mechanic In A Bottle, to about 1/4 of a tank of gas, or less, initially, then fill tank, after surging clears.
We can continue from here. Thanks!
Thanks for letting me know. Did you add some Mechanic In A Bottle to your gas?
Eric, let's hope the Mechanic In A Bottle works for you. Remember to add it to a 1/4 of a tank of gas or less. Check out the directions on the bottle.
If this doesn't work, your carburetor will need to be soaked and given a really good manual cleaning.
Please let me know what your results are. We can continue from here. Thanks!