153 the sprinkler slows down and turns off during operation.

If the sprinkler is idling, it will usually turn off. At this point, adjust the idle screw first. If the fault disappears after adjustment, we can know that this is the reason.

You can turn up the throttle a little, keep the sprinkler engine running, and check whether there is air leakage at the carburetor and intake manifold gasket with cotton yarn or paper. If no air leakage is found, you can remove the idle metering hole for inspection, blow through the idle oil circuit at the same time, and then reinstall the test. At this time, if the fault disappears, it means that the idle metering hole and idle oil circuit are blocked.

For carburetor with idle stop valve, it is also necessary to check whether the electromagnetic coil circuit of idle stop valve is normal. If the idle fuel-saving metering hole is blocked due to abnormal electromagnetic coil circuit, the idle stop valve needs to be repaired.