What causes a choke to stick?
More gas goes in, which is what you want for cold starting. As the engine warms, the flap opens to let the engine breathe more air. If the choke valve sticks, the mixture will stay rich. Your warmed-up car will be hard to start, run poorly and waste precious gasoline.
Should the choke be closed when running?
The choke is only used when starting a cold engine. When doing a cold start, the choke should be closed to limit the amount of air going in. This increases the amount of fuel in the cylinder and helps to keep the engine running, while it is trying to warm up.
What is a choke unloader?
The Choke Pull-Off, or Choke Break, is vacuum-operated and designed to open the choke plate slightly after a cold engine start to prevent engine flooding.
Why will my bike only run on choke?
If a motorcycle or ATV only runs with the choke on, it’s because the richer “choke on” mixture is actually closer to the engine’s normal operating fuel mixture than the leaner “choke off” mixture. So when the choke is turned off, the engine gets too little fuel and too much air for it to run and it stalls.
Do you run engine with choke open or closed?
When using the choke, this means that the entire amount of air entering an engine must pass through, therefore the choke must be closed during a cold start.
What happens if you ride with the choke on?
As carbon builds up, you may get deposits that build up on your spark plugs. This can cause the spark plugs to foul up, resulting in you needing to change them out for new ones. This is not a terribly difficult task, but it is one that you would perform less often if you turned your choke off while riding.
How does a choke thermostat work?
The Choke Thermostat controls the idle of the vehicle by opening or closing the butterfly valve on the carburetor. When the engine is cold the thermostat will hold the valve closed which supplies a richer fuel mixture to the engine.
How long should you leave the choke on motorcycle?
After 30 seconds is usually enough for most bikes. Especially a small thumper. Just reduce the choke slowly. If it wont idle smoothly (sounds like an asthmatic pensioner) then it probably wants the choke on a bit longer.
Why does my motorcycle only run on choke?
Is it bad to ride a motorcycle with the choke open?
The truth is that while this is not good for your bike and it will cause some problems if frequently done, it is not that bad for your bike. But if you do this too often, it will cause your bike to run richer (using more gas), and may cause damage to the motorcycle.
Does choke use more fuel?
It absolutely does use more fuel. What the choke does is creates a restriction in the carburetor, which in turn creates a higher vacuum so the engine will draw more fuel when it is cold. This is called fuel enrichment.
Why does my 212 Predator only run while the choke is on?
If your Predator 212 or any other Engine is only running with the choke turned on, then the problem is the Air-Fuel Mixture. To be specific, the engine is getting too much Air but not enough fuel for combustion. So when you turn on the choke, some of the air gets blocked and the engine runs smoothly.
Why won’t the choke close all the way?
If the choke setting is made “leaner” then it doesn’t close all the way when the engine temp is “cold”. Edelbrock refers to this condition as “warm flooding” in their manual, but offers no solution. I once had a 1970 AMC Hornet, six cylinder, dual barrel Holley.
How does a choke system work?
The first choke systems were manually operated, using a cable controlled by the driver from inside the vehicle. The operator had to remember to cancel the function gradually as the engine built coolant temperature.
What does choke on and choke off mean on a motorcycle?
At that point the choke is turned off and the engine runs with a leaner fuel/air mixture. If a motorcycle or ATV only runs with the choke on, it’s because the richer “choke on” mixture is actually closer to the engine’s normal operating fuel mixture than the leaner “choke off” mixture.
What happens to the choke when the engine fires?
When the engine fires, the increased piston velocity partly blows the choke plate open against spring tension to allow a sufficient amount of air to lean the mixture by reducing the depression in the venturi.