Most people believe that cleaning a carb involves removing the bowl and wiping it out, then spraying some carb cleaner through it. When removing the carb, make sure to take a good picture, or make a good drawing of where all springs and linkages are attached. The only 2 solutions are to either replace the carburetor or give it a good, thorough cleaning. Varnish can also cause the float needle to stick shut, and not allow any gas to flow from the carb bowl into the engine. If this is the case, you will need to change the oil and filter, if it has a filter. This will be evidenced by your oil level being over-full and/or the oil smelling like gas. If the gas gets into the cylinder, it will seep past the rings and down into the crankcase.
The result will be gas overflowing the carb and running into the cylinder, and possibly out the air intake. When this happens, either the engine simply will not start, or it will not run without the choke on (this reduces the amount of air getting pulled into the engine, changing the fuel/air mixture), or it will run but surges.Īnother issue that varnish in the carb can cause is that the varnish may not allow the float needle to seal properly against the seat, causing the flow of gas to not shut off when the bowl is full. They will greatly slow it down, but the gas will still go bad. The use of fuel additives, such as Sta-Bil or Sea Foam will not stop this process from happening.
It will not happen overnight, but the symptoms can show up all of a sudden, even while simply stopping to refill with gas.
Every time gas sits, the varnish builds up just a little more, like coats of paint, until eventually gas can not flow. Today’s gasoline formulation goes bad in as little as 30 days. This is a classic symptom of a carburetor that has become plugged with varnish.Īs gas gets old, it turns to varnish and clogs up the passageways inside the carburetor, not allowing enough gas to get to the engine. My name is ***** ***** I am going to assist you with this.
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