comes over choked As it runs at idle and heats up, I readjust the choke setting, more but never get to the lowest…or highest.
tb2bp ec backpack gas leaf blower

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If your carburetor is clogged, it can cause your leaf blower`s engine to die when the choke is disengaged. You can disassemble it, clean it, and replace individual parts with a carb kit. Once your carburetor has been unclogged, cleaned, and re-assembled using the carb kit, the engine should run with the choke off.
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving old fuel in the leaf blower. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog the fuel filter and cause the engine to stall.
The fuel filter might be clogged. A clogged fuel filter is most commonly caused by leaving old fuel in the leaf blower. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog the fuel filter and cause the engine to stall.
Using a faucet or garden hose, rinse the filter from both sides, starting from the interior towards the exterior to prevent pushing dirt further into the fibers of the filter. Avoid wringing or stretching the filter – they can tear easily. Rinse until the water runs clear. Repeat the process if necessary.
Replace the filter if it is damaged or fouled with fuel; anyway, the filter should be changed every 6 months. If the blower is subject to intensive use, the air filter should be replaced more frequently.
Most leaf blower manufacturers recommend you clean and/or replace the filter after approximately 20 hours of usage. This is more applicable to landscape professionals and lawn care and garden service providers than it is to the average user.
A snowblower that runs better on half choke likely suffers from a dirty or faulty carburetor. Cleaning or replacing the carburetor will fix the issue.
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.

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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

Chainsaw stalls Chainsaw is 4 years old and has a history of moderate use. After I ran the saw about 1 minute on plain gas (grabbed the wrong gas can – ouch) the chainsaw sputtered and stopped.

It didn't seize, and the pull starter never became more or less difficult than normal. The engine would continue to start if I pressed the prime bulb and engaging the choke, but stall again after 10-20 seconds. The temperature that day was about 50 degrees F and I was running the saw with the “cold plug” installed (per warm weather running).

When it refused to keep running I did the following:
Flushed the fuel tank (that's when I saw the gas had no oil in it).
Ran hardware wire through all of the fuel lines.
Replaced the fuel filter and spark plug.
Cleaned the air filter with a nylon brush and compressed air.

Same behavior (start then stall in less than 20 seconds). I made at least 20+ attempts to start it.

I removed the carburetor and, though it looked perfectly clean, I took off the top and bottom covers then sprayed everything with automotive carb cleaner and blew out the passages with compressed air. The gasket and diaphragm looked new. No pinholes in the diaphragm when held against a bright light. I reinstalled the carb but got the same behavior (start then stall in less than 20 seconds). I again made at least 20+ attempts to start it.

I disassembled the short block and saw that the piston has some slight scoring on it. The ring is clean and I verified that the piston ring has .001 clearance between it and the piston ring groove all the way around with the ring held tightly in place (I was thinking that the piston might have become deformed if it did indeed get too hot when run without any oil premix).

The cylinder wall has no scoring and there isn't any signs of melted aluminum anywhere. The crank is clean as was the inside of the crank cover.

I reinstalled the crank cover using permatex non-hardening gasket goop and torqued the cover bolts to 10 inch pounds. I reassembled everything else per the exploded diagrams in Echo's “parts manual” for the CS400.

During assembly I took note that both the carb gasket and intake boot look like new.

Still the same result: press prime bulb once, engage choke, pull a few times and it starts but stalls after 10-20 seconds.

I'm stumped.

ANSWER : Not sure what to say other than its fuel starvation, if not already done replace the fuel filter in the tank, if no better i would suspect a massive air leak, so replace the crank seals, if there is no primary compression in the crankcsae fuel will not pull through the engine, good luck.

Can get it to start, but runs about three seconds and stops. the choke is pushed in. But seems to want to run longer with the choke out. 4 seconds…
ANSWER : Its the old problem,,,,,,,short of fule, or no fule getting to the carb,,,,, clean out the tank filters and then clean out the carb and all the jets in it as well put in fresh fule and then it will run all day and with out the choke being on,,, thats a lot longer than 4 seconds!

Starts right up on choke. then run inrun position for a minute and have to go back to choke to keep it running ,then it runs fine for a couple of minutes and have to go back to choke and start all over again.
ANSWER : This happens with the cover off, so not the filter.

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?

My petrol lwan mower won’t start! I have checked the spark plug and cleaned it, checked the air filter and have also cleaned it they are fine. I have also taken the carburettor to bits and have cleaned it and still no joy. It has a full tank of petrol and the oil is fresh also. I checked the air line and the petrol pipe and these are all ok. When i sprayed quick start into the air filter my lawn mower started up straight away. Then cut out once it had used it up. my throttle plate had also snapped which i fixed and my clutch cable had also come loose which i have tightened and is now fine. The lawn mower is only 3 years old and has not been used for 2 years as my neighbour just went out and brought a new one. so i am trying to get this one started as my electric one has just died on me. I have also been having a go at setting the carb today buy adjusting the air pin but still no joy. It is firing though but just wont start!!! can anyone else suggest anything that might be wrong. Also do these have chokes as i can not find one for it. MY LAWN MOWER IS A POWER DEVIL 3.5HP
ANSWER : When you sprayed the quick start into the thing and it started and ran out, I think the answer sits here you also said you pulled the carb apart to bits it is apparent to me you did not do a thorough job!! Just the fact that you stated that it has not been started for two years tells me that you are having petrol movement problems. For one thing to get started check all the little orifices associated with petrol movement this is surely where you will find your answer to get the machine running, I know this for a fact. You will receive joy just as soon as all your do diligence is finished. If you cannot find the choke on your machine you surely cannot buy one for it. Maybe this repair stuff is just not your thing, maybe as your neighbor before you, you should maybe go shopping and then you will achieve the full amount of joy you are in such desperate need for. Going from electric power to petrol power is a total different world. I think that now my answer to your question is almost as long as your question, so I will be stopping because my fingers are tired of all this typing, GO BLACK HAWKS! Good luck PAL

Seems to start easily run for a few minutes and then slow and stop–bulb remains full –gas is good–have tried half choke in case too lean–did not solve–also seems possibly related to the angle I hold it at–seems to cut out quicker if blower tube angled more downward.
ANSWER : Your filter may be hanging up in the tank. you also my be losing compression

Echo blower wont start after replacing air filter kit