Craftsman

Leaf blower starts and runs ok for few mins then slows down rpms, but runs at about half speed when hand thottle lever is in wide open setting,, also have gas being throwed back in to air filter
Experienced gardeners share their insights in answering this question :
Target your inspection towards the ‘spark arrestor screen’ in the outlet of the muffler.

Overfuel or ‘rich’ conditionBasics to check:
1) Spark plug – brown or dark brown – OK a) is it carbon or fuel fouled b) is there spark
2) Muffler remove for inspection a) exhaust screen clean or plugged b) inspect cylinder wall/piston as the flywheel is slowly rotated
3) Check Air filter for fuel saturation
4) Allow engine to run for 5 minutes to excess fuel from muffler
5) Fuel mixture ratio: Make sure the oil mix is per your manufactures recommendations
6) If after the above the engine is still smoking and blubbering: Adjust carb mixture screws to a ‘less rich’ setting *NOTE: only move mixture screws 1/8 of a turn at a time, and try operation before any more adjustment

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

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.
Check for a dirty air filter and replace if needed.

A clogged filter limits the amount of cool air that passes over the heat exchanger, causing it to overheat and shut off. At the same time, your blower turns on to help cool it down.

A clogged air filter may cause your blower to idle roughly as well. Air filters can be cleaned to ensure they run properly, and should be inspected as part of your normal blower maintenance routine. If the air filter in your leaf blower is partially plugged, it can cause your engine to run, but die at full throttle.
They are ignition protected to prevent sparks, and are built to resist overheating and corrosion. The size blower you need is determined by the volume of your engine compartment. It is recommended that you use a blower at least 4 minutes before you ever start the engine, and especially after fueling.
Problems include dirty filters, broken wires, poor voltage supply and faulty limit switch or capacitor. You can test your limit switch with a multimeter, and clean the blower motor`s wire coils. If this doesn`t work, you may need to replace your furnace blower motor.
If your blower is having a difficult time starting, then you may be dealing with a carburetor issue. The carburetor`s job is to ensure the proper mix of fuel and air is directed to the blower`s engine. As mentioned, the carburetor can become clogged, making it difficult for fuel and air to enter the engine.
Lack of maintenance: This is probably the most common reason that causes condenser fan motors to overheat and shut off. Proper and regular lubrication of the fan motor is necessary for the motor to run smoothly. Periodically making sure that there`s no debris or dust in or around the fan motor is also a good idea.
It won`t go endlessly on one charge; about 15 to 20 minutes is reasonable – if you need a blower that runs longer, get a corded or gas-powered model. And it won`t demolish that huge pile of wet leaves on your lawn – but it works well with lighter debris on hard surfaces.
The gas engine on your leaf blower needs to operate at a specific temperature: hot enough to burn the fuel and give the engine power but cool enough not to overheat the piston. An overheating problem in the leaf blower is generally caused by a failure to vent gases or the fuel burning too hot inside the cylinder.
The gas engine on your leaf blower needs to operate at a specific temperature: hot enough to burn the fuel and give the engine power but cool enough not to overheat the piston. An overheating problem in the leaf blower is generally caused by a failure to vent gases or the fuel burning too hot inside the cylinder.
Some cordless leaf blowers last for 15-20 minutes, while others can last over an hour. If you have a large yard, choose a cordless leaf blower with a long life to its battery to eliminate the need for a recharge midway through your session.

Discover Relevant Questions and Answers for Your Specific Issue

the most relevant questions and answers related to your specific issue

Poulan gas blower 30 c back pack blower ran fine stoped will not start no spark
ANSWER : Check switch is bad if not coil bad if not getting spark

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I recently tuned up my blower. It starts great but if I turn it off Nd try to restart it it floods and will not start until I let it sit for awhile.
ANSWER : If the engine is warm and you shut it down, leave the choke off, lower the revs and start it. (when the choke is wide open you are using the fresh air coming in to dry the spark plugs and prevent flooding). If the motor is already flooded use that procedure to dry the plugs, then go back to full choke until it tries to start and quits again, then use half choke and pull one more time… works all the time.

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Started PB620-ST yesterday with some difficulty. However, ran until fuel empty. Refueled today, but will not start. Spark at plug ok. Fuel flowing, but seems to overflow into air filter compartment. Does not seem to “fire” at all.
ANSWER : Sounds like your flooding the engine; I did the same thing. Wait a while to let the gas drain back to the tank. Use your primer bulb once and your choke for only ONE pull; then shut off the choke. Pull start without the choke 2-3 times and it should start.

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Starts runs a couple of minutes then dies – Echo Gas Blower 135 MPH390 CFM Blower PB250
ANSWER : It
sounds like you have a bad Ignition Coil (Module). This is how they act
when they start going bad. When they get warm, they quit. Some will
last up to 20 minutes before they shut down. You can sometimes find a
used one pretty cheap at a small engine shop.Jim

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I have an Echo PB251 Handheld Leaf Blower that I just installed a new carburetor on and it still won’t start – WHY?
ANSWER : Spark arrest in muffler could be clogged. Remove muffler and clean.

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How do I adjust the air intake screw on my poulan?
ANSWER : Sould like the choke is getting stuck or head gasket is gone

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Handheld 4cycle blower stops after 5-10 min- hard to start then- starts ok when cold-oil a little low & grey
ANSWER : Address the oil situation immediately. Oil should never look “grey” in color. Get the proper weight of oil for the machine. I recommend synthetic always be used. Advance Auto Parts sells synthetic under their store brand, comparable in cost to name brand conventional oil. Keep a close eye on the color and level of the engine oil. Synthetic will clean the engine real well, so be prepared to change it again.The machine is probably stopping because it is getting hot from poor lubrication.

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While running blower starts dying down in power going up and bown and cuts off
ANSWER : I wonder if it is starting to seize. Have you been using cheap ethanol gas. Or have you done research online for gas stations that sell real gas? If you don’t use real gas on a 2 stroke engine it will over heat and eventually burn the valve and cause distortion all over. It will eventually seize.http://pure-gas.org/

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