By restricting the flow of air into the throat of the carburetor, the choke valve reduces the pressure inside the throat, which causes a proportionally greater amount of fuel to be pushed from the main jet into the combustion chamber during cold-running operation.
Leaving the choke on for too long will cause unnecessary engine wear and waste fuel. … The engine needs its fuel to be vaporised in order to burn it. This is done by the carburettor where the fuel is mixed with clean air coming from the air filter, and sent into the pistons to be ignited.
The lever type choke should be in the down position during normal operation. To use the choke to start a cold engine, lift up on the lever to turn the choke on. Once the engine has warmed up, return the lever to the down position. What is this?
Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine. … Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting.
Typically the “choke” is on when the choke lever is in the up position or when the choke lever is inline with the handle bars on your bike. Choke on means that the choke plate is covering the carb throat.
3 Answers. It will not damage the engine at all. All that will happen is that it will run richer, thus using more fuel. If you did it for thousands of miles you’d probably end up with more deposits in the engine/exhaust, but even that is easy to sort.
When the choke butterfly is allowing the most air flow, without restriction, it is open. Like a door. Open lets things through. when the choke is restricting the flow of air, it is closed.
You’ll normally find it on the left side of your riding lawn mower. They’re easy to identify, thanks to their labeling picture of a rabbit and turtle.
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.
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.
When a two-stroke only runs on half choke it is usually the result of a dirty fuel cap, a leaking gasket, a clogged carburetor, or a gunky passageway. … You can fix these problems by cleaning the carburetor, removing the fuel, and adding new gas.
A manual choke is a mechanical device that links a retractable knob in the driver’s compartment, via a cable, to a metal plate inside the carburetor. The metal plate moves to increase or decrease the amount of intake air in order to provide the optimum fuel mixture for the engine.
Open the choke all the way if you notice that it has been closed. If it has been open, the carburetor may be flooded. Close the choke, and pull the starting cord a few times. When you get the engine to sputter, open the choke, and try starting the mower.
The choke is located before the throttle, and manages the total amount of air going into the 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.
The answer is no, it is NOT OK to ride your motorcycle with the choke on. Whilst your motorcycle might technically run with the choke on, you should not do so.
A lawn mower choke reduces the airflow of the engine, allowing for more fuel to be used. This process allows the engine to spark and ignite easier, starting up in an instant. Choke valves should only be used when absolutely necessary, as they can damage the engine if they’re overused.
You should only need the choke when the engine is cold, and only for 30 – 60 seconds or so, depending on ambient air temp. Once the engine is warm, the choke should be off or you will foul the spark plugs.
So, why does a motorcycle only run with the choke on? It means your motorcycle is not getting enough fuel, and this can be caused by dirty or clogged pilot jets, clogged fuel line, clogged fuel filter, dirty petcock, loss of vacuum in the carburetors, among other carburetor issues.
Without the muffler cool or cold air can get right in to the exhaust valve which can cause bending of the valve from cooling too quickly. If this does happen the engine will loose compression and the valve will need to be replaced.
The carburetor is dirty and needs to be cleaned
When the carburetor is dirty, the ATV may not be getting enough fuel to run correctly, either when riding or at idle. … A gummed up carburetor can often be cleaned to working order by running through a couple of tanks with a carb cleaner such as SeaFoam added to the fuel.
any time you need the choke on for the engine to run you are shutting down the air flow because there is not enough fuel getting to the cyl. … there is still some passage inside the carb blocked not letting enough fuel into the cyl. for the engine to run. or there is an a gasket on the intake leaking sucking air.
Clarification: When the choke is applied the fuel is made to come out from the main jet and the fuel is delivered. The choke valve is closed, the whole of the engine suction is applied at the main nozzle, which then delivers fuel. 7.
When trying to start a flooded engine, the end goal is to re-establish the fuel-air balance in your vehicle. To do so, simply open the hood of the car and let the excess of fuel evaporate. After waiting for some minutes, try starting your car again, keeping your foot away from the gas pedal.
It’s not a choke. It’s really a fast idle thingy (technical term) to bump up the idle speed while the engine is warming up if the fuel injection can’t cope properly when it’s idling and cold.
In most cases, if your bike absolutely refuses to start, the problem is electrical. The quickest way to find out if it’s electrical is to check the plug for spark. Remove the spark plug from the cylinder head and pop it back into the spark plug cap. … If you have yellow spark, try a new spark plug.
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