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How do I adjust the screws on carb on McCullough model 40005102 gas blower

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If equipped with screw limiters you can only adjust slightly using a flat or phillips screwdriver. If not limiter equipped you may need a special driver that only authorized shops are supposed to use. EPA is tightening stuff up on small engine carbs for some odd reason. You might want to try adding some fuel system cleaner and seeing if your blower picks up on the top end without any twiddling.

Be safe and good luck!

Posted on Dec 01, 2014

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Posted on Jan 02, 2017

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SOURCE: poulan pro bvm200 leaf blower/vac won't run on high

Is the exhaust spark arresor screen clean? a blocked exhaust will do this.

Posted on Jan 08, 2009

sparksflyin
  • 47 Answers

SOURCE: homelite backpacker blower # uto08083 not running

fist thing is run both the carb screws all the way in then back them off 1 1/4 turn this will be your starting point then start the blower to fine tune the carb if it starts then your carb was off giving it to much or to less fuel

Posted on Feb 05, 2009

  • 124 Answers

SOURCE: How to adjust the carb on a McCulloch super

There is no set adjustment on any blower or chain saw. If it were that simple there would be no need for adjustments. The problem is that most equipment manufactured in the past 10 years can not be adjusted by the user. Carburetors are now equipped with either adjustment limiters which limit the adjustment to less than half a turn or with adjustment screws that require a special tool to make the
adjustment. More than likely you will have to take it to an authorized dealer for those adjustments.

If you do have an adjustable carburetor, then gently close both needles and open each on 1 full turn. This should allow the engine to start and the final adjustments can be made at that point. If it still will not start then open each needle 1/8 to 1/4 turn and try again. If this still does not work then most likely your carburetor needs a good cleaning and a rebuild kit.

Posted on Sep 20, 2009

daneinwv
  • 124 Answers

SOURCE: husky 125B blower, new right


Hello,
My name is Dane and I am going to assist you in solving your problem.

You will need to adjust the high speed setting on your Carburetor jet. Turning the screw out just 1/2 turn or so should do the trick. It is not so hard to adjust the Carburetor, however, yes you do need a special tool that is very hard to get your hands on, in order to adjust the jet screws. They don't make many engines with plain screw heads anymore. The newer Carburetors are factory set lean so they can pass emission standards. Since you just bought yours, a local husky dealer should adjust the mixture for free. I hope I've helped. If you found this reply useful, please leave me some THUMBS UP, if you feel I

Posted on Dec 09, 2010

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