28cc Hand Held Blower HVH 125B

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Hi sounds like the air filter may be blockedGood luck

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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.
All gas-powered handheld tools have a choke that lets you adjust how rich or lean the mixture of gasoline and air that goes to the engine, and for a cold start it needs to be in a closed position.
Turn on the ignition of your car. Once the engine is warm, you can remove the air filter and check whether the choke is open or closed. At this point, the choke should be open to allow the engine to breathe fully.
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.
Leaving the choke on while operating will result in excessive fuel consumption, irregular engine power performance and eventually may even damage the engine.
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.

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My blower only runs with 3/4 choke even after warm up.
ANSWER : Look on the carb for 2 screws side by side. where those screws go into the carb, it will be stamped with an “H” and “L”. Open the screw that is next to the “H”, counterclockwise about 1/4 turn at a time with the engine running, that should solve it.

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Echo pb500 only runs with choke open – Echo Gas Blower 162 MPH 450 CFM Blower PB500T
ANSWER : I’m not to sure about the question. But you say it runs with the chock open. Your engine will only run with the chock open. Can you clarify?

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Want run unless choke remains on – Stihl Bg72 Leaf Blower Intake
ANSWER : Probably fuel starvation.Wrong fuel air mix settings on the carb. Damaged carb diaphragm.

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Will only develop power (and run somewhat properly) when the choke is engaged about 90%. Starts fine.
ANSWER : Sounds to me as tho you may have a loose carburetor or another part that is letting air into the system. Check all bolts and screws for tightness. Also, you may need to clean the carburetor or put some cleaner in your gas. Not too much, only about a tablespoon, but check the screws/bolts first.

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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

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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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Just bought a husqvarna 125 B blower at the end of last summer. It starts right up but when I give it the throttle, it bogs down and has no power. The fuel is fresh and clean and there is a new spark plug in it. I pulled the carb and made sure the ports were clear. Also checked the fuel line in the tank.

Is there a speed adjustment screw I should be looking at?

Any suggestions would be greatly appreciated.

ANSWER : Ajust the high speed carb screw or run on partial choke

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While running what setting does the choke lever need to be placed in
ANSWER : Depending on how your unit runs, it may need to be on half choke until the motor warms up. After the motor gets hot it should run with the choke fully off.

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