Mtd
Murray riding lawn mower.
ohv-130 206809a (H)
ohv-130 206809a (H)
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An engine that will fire and run with the choke closed but dies when the choke is opened likely has debris at least partially blocking the fuel passages in the carburetor. In this condition the closed choke provides enough extra fuel to enter the engine to overcome the lack of fuel flowing through the other passages.
Why Does Your Lawn Mower Only Run With Choke On? Your lawn mower only runs with choke on because of a problem with the engine fuel-air mixture system, which can be caused by the carburetor, bad fuel, or air leaks. The choke compels more fuel in the combustion chamber to help the engine to turn over when cold.
Its common for small engines to need carburetor adjustments over time. Your engine is running lean and putting the choke on partially is helping it draw more fuel to run good. Adjust the carb if its adjustable or buy a new carb. You can find info on carb tuning in small engine service books.
If your bike is only running with the choke on, it`s probably because it`s running too lean. This can be caused by a few different things: All internal combustion engines need three things to run: fuel, air, and spark. If any of these are missing or not working properly, the engine won`t run.
Why would the engine only run while the choke is on or with repeated manual priming? An engine that requires the choking (partial or full) after initial engine warm up is an indication that the engine fuel air mixture system is out of adjustment.
We do not recommend that any type of outdoor power equipment be operated after initial warm-up and with the choke control outside of the normal run position for longer than 5 minutes. Some engines utilize a manual fuel primer bulb to enrich the ratio of fuel in the fuel air mixture for initial engine starting.
If the choke is left on for too long, excess fuel flows into the combustion chamber, causing it to seize up and stall. If this happens, the lawn mower will need to sit idle for several hours to allow the fuel to drain out of the chamber. Turn off the choke and try again later.
A choke valve/cable is designed to restrict the flow of air in the carburettor of an engine. This helps enrich the fuel-air mixture, improving the ability to start an engine in low temperature conditions.
With the choke on, the fuel blasts its way in and provides the carburetor with the fuel it needs. While this is relatively safe and doesn`t harm any of the internal parts of the bike, it does lead to higher consumption of fuel.
Whether you have a 2 stroke or a 4 stroke, if the idle adjustment is set too low, the engine won`t stay running. Turn the idle screw in and see if your dirt bike stays running. You may have to turn the idle down slightly as the engine temperature warms up.
The choke is intended only for cold starting. The engine won`t run properly or won`t run at all if the choke is left `on. ` The choke should be `off` all of the time when you are driving. Don`t use the choke at all unless it is necessary to start the cold engine.
When does the bike run only with a choke? This mainly happens when there is dirt in and around the parts of the carburetor. The areas of concern here include fuel lines, petcock, pilot jets, or fuel filters. The dirt blocks the fuel passage and it cannot reach the carburetor properly.
If the carburetor is clogged, it may only work with the choke engaged, which is not a good way to be running your engine. Cleaning the carburetor and replacing some of the internal parts with a new carb kit is a great way to get your carburetor running properly again.
Choking on saliva may not indicate a serious problem. It happens to everyone at some point. Even so, don`t ignore continuous choking. This could indicate an undiagnosed health problem, such as acid reflux or a neurological disorder.
Discover Relevant Questions and Answers for Your Specific Issue
the most relevant questions and answers related to your specific issue
Blower only runs with full choke. When I switch to half choke, it dies and won’t start.
ANSWER : It may simply need the high speed jet opening up a bit (2 screws near eachother on the carb and the high speed is furthest from the engine)failing that it needs a carb kit…. this is a serviceable item changed regularly.
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Will only start and run in choked position, when throttle applied chokes out. If started with out choke and throttle position in low speed will start and run for 10 sec then like it runs out of gas.
ANSWER : I have your solution guaranteed, I fixed mine yesturday remove H L screw plastic caps and on high 11 threads exposed and on the low side 8 threads exposed. removing the plastic caps allows u further adjusting these wear out or move soo just take them things off and you will be rolling
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I am having problem with my engine, it wont stay running when u cut the choke off. and i noticed one spark plug is not firing. could this cause it to die when u push choke in????
ANSWER : Yes that could cause it to stall without choke, check plugs, wires, coils and air filter. It could be any one of those.
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Troy bilt blower (gas) will not run on full throttle,if I have the choke on will run but as soon as I cut back on choke the machine dies.
ANSWER : I believe you need some carburetor adjustment done or you have some bad gas. The manufacturer’s school we have been to this year, told us any fuel over 30 days old is considered bad gas. And in many cases we have found that to be true with the repairs we have had to do.Good Day.
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Starts full choke dies out runs for a few min at half choke dies out at no choke. noticed tank is full of air bubbles when running
ANSWER : First, you will need to check the fuel lines for cracks/breaks.You will need to disassemble the carburetor and spray
with carb.cleaner. Make sure the small screen in the carb. is free of
debris. Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. These portals can become blocked. Reassemble and start.(NOTE:
If the carburetor parts are more than four years old, and depending on
the use, you will need a new carb. kit if the cleaning doesn’t work.)If you need further assistance, just let me know.Jim
with carb.cleaner. Make sure the small screen in the carb. is free of
debris. Use a Den Tek Brush, (http://www.drugstore.com/products/prod.asp?pid=165357&catid=1152), to clean the small portals in carb. These portals can become blocked. Reassemble and start.(NOTE:
If the carburetor parts are more than four years old, and depending on
the use, you will need a new carb. kit if the cleaning doesn’t work.)If you need further assistance, just let me know.Jim
Read Full Q/A … : Mtd
Starts on choke and continues to run. When choke is turned off , it tries to run faster then dies. Possible fuel obstruction?
ANSWER : Hello,
You have a fuel restriction for sure, have you replaced the fuel filter yet?
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My mantis will not stay running unless the choke is full on
ANSWER : Sounds like the fuel pump diaphram in the carb. you need to either be familar with it or take it to thae shop to replace
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Have to run on half choke,just stops if i turn it off.fuel is 25 to 1. thanks alan.
ANSWER : More than likely a small passage way in the carb is clogged. You can try some carb cleaner, but you may need to disassemble the carb and clean it out. Be advised that these passageways are sometimes as fine as a human hair, and almost impossible to clear sometimes. A new carb may be required if it is worth it to you. Sorry.
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