Small Engine Troubleshooting Problems? Ask a Mechanic Now.
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Many times, if our engine throttles back and forth, and will only run constant, if your choke is on, indicates that you either have a partially clogged carburetor, or you have a restriction in your fuel flow.
If you are getting a steady, full flow of fuel to your carburetor, then it is very likely that your carburetor will need a really good cleaning.
One of the small jets, or fuel passages, inside your carburetor is very likely clogged. We can continue from here. Thanks!
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