Yeah, I know that Stihl and others recommend Fast Idle and similar for starting a flooded engine, but that never seemed to work as well as the RUN position for my 2-strokes. Maybe all those frustrating attempts on fast idle did substantial work to clear the flood before switching to RUN and pulling multiple times. RUN position also made pulling easier than with full throttle.
Typically when a chainsaw wont start when warmed but starts and runs fine when cool, it’s because the air/fuel ratio is too rich. Close the Choke, Then Set It to “Run” or “On” Because your saw has been running, it’s already had fuel cycled into its carburetor. If dust, wood chips or other material blocks these systems, the engine will start to overheat.
chainsaw floods when warm Related Question:
Why does my chainsaw keep flooding out?
There could be various causes: incorrect fuel mixture, carburation not calibrated properly, or a wet spark plug. In spite of their power and robustness, chainsaws are actually rather delicate machines that require careful and precise maintenance at every stage of their life cycle.
What causes a chainsaw to vapor lock?
Vapor lock occurs when the fuel (usually gasoline) within the fuel delivery system overheats and vaporizes too rapidly. The resulting excess gas bubbles accumulate to the point of actually blocking normal fuel delivery.
How long should chainsaw sit after flooding?
The first is the easiest and most common method. Let your chainsaw sit for 15-20 minutes to allow the fuel to evaporate from the engine and then repeat the starting instructions. This method will work best with a mildly flooded engine.
How do I know if my chainsaw spark plug is bad?
If it’s not producing any sparks at all, your chainsaw needs a new plug. If there are only a few sparks coming out of one side of the electrodes but none on the other side, it’s not bad enough for you to worry about, but it will affect your performance.
How do you stop vapor lock?
Once the fuel system has cooled, you can help eliminate any vapor left in the fuel system by first pressing the accelerator pedal slightly (do not press it to the floor) while cranking the engine. Once the engine starts, hold the accelerator pedal down until the vehicle runs smoothly, indicating the vapor lock is gone.
What causes a flooded engine?
A flooded engine is an internal combustion engine that has been fed an excessively rich air-fuel mixture that cannot be ignited. This is caused by the mixture exceeding the upper explosive limit for the particular fuel. An engine in this condition will not start until the excessively rich mixture has been cleared.
Will a flooded engine fix itself?
Will a flooded engine fix itself? No. You have to take appropriate measures to restore the fuel and air balance in your car’s engine.
How long does it take to Unflood an engine?
Perhaps the best remedy for a flooded engine is time. Simply open the hood of your car and let excessive fuel evaporate for as long as you can. After about 20 minutes try starting your car again without hitting the gas pedal.
Can you flood a 2 stroke?
Overpriming or a choke that has been left open too far may cause the engine to flood, resulting in an excess amount of fuel entering the combustion chamber through the choke. You can start your two-stroke engine relatively easily if it is flooded.
Will a vapor locked engine turn over?
Proving the Problem Once it’s been shut off, however, it won’t restart. After sitting for an hour or two, it will start again and run with no apparent problems. To confirm a vapor lock problem, we installed a clear hose from the fuel pump to the carburetor inlet.
How hot does vapor lock get?
When modern injection motors break down after traveling for a long distance, some might not be able to restart right away. This is because those new motors reach temperatures of up to 120–140 °C, and vapor lock is likely to occur at such high temperatures.
What causes a motor to vapor lock?
What is Vapor Lock? Vapor lock happens when the temperature of fuel gets high enough to transform liquid into a vapor state. Fuel pumps are designed to pump liquid, not air, and the increased pressure inside the fuel lines keeps the fuel pump from being able to keep the fuel moving.
How often should you change a chainsaw spark plug?
A poorly functioning engine in a Stihl chainsaw can mean more work for the operator and can even be dangerous. Consequently, Stihl recommends replacing the spark plug after every 100 service hours.
How do I know if my spark plug is misfiring?
Symptoms of misfiring spark plugs include rough idling, uneven power when accelerating, and an increase in exhaust emissions.
Can vapor lock cause overheating?
Vapor lock causes engine stopping in older cars due to fuel overheating. Location of carburetor inside the engine system matters a lot. The problem is higher in engines with carburetors located next to the entire fuel system. The fuel lines and pumps become extremely hot during hot days.