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Countax C300H running problems

The engine revs up and down by its self but runs fine with the choke left on? what could be the problem

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Carb jets probably need to be cleaned

Posted on May 14, 2014


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Posted on Jan 02, 2017

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SOURCE: starts on choke but dies when moved off choke

If it will start on choke and die when choke is taken off...the carb needs to be taken off and cleaned. The main jet in the carb is probably clogged.

Posted on Apr 21, 2009

  • 135 Answers

SOURCE: blades not cutting checked all belts they are ok

Either the belts are worn making them too loose, or you may have a spindle issue there. Check the spindles to make sure they aren't seized. Also, check the blade center nuts to make sure they are tight. Good luck.

Posted on Oct 09, 2009

hunter19_46m
  • 7482 Answers

SOURCE: engine starts well but runs only with the choke

Sounds like you will need to clean your carburetor.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages because there are sometimes small rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor a few times, and letting it run a few times like that and it will flush the gunk out of the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to reassemble the carburetor.
If the mower/weedeater is over a couple years old, then I also recommend that you buy and install a new carburetor repair kit,because the diaphragm will get hard and that will cause it to be hard to crank.
When you clean your carburetor and remove the jet screws, You will first seat the jet screws and count the number of turns it takes to seat the jets from their original position.
That way when you go to put the jets back in, you know how many turns they were in/out.
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Posted on Sep 15, 2010

  • 1 Answer

SOURCE: My countax C300H starts OK but when I engage the

Just got one of these mowers myself - accidentally got a large stone caught in the blades which caused the same problem. It looked to me that there's a sensor on the flywheel that cuts the motor if the blades aren't rotating freely. You might find either that the sensor is broken (check it by pulling off the connectors and connecting them together) or that the blades aren't rotating for some reason.

Posted on Apr 21, 2011

  • 87 Answers

SOURCE: mower runs with choke on turn choke of rev up and

You have a dirty carb, start off by cleaning and draining your carb and your fuel tank, remove the fuel bowl on your carb and use a spray can of carb cleaner to clean the tank and carb bowl. be careful not to ruin or loose the orings that seal the carb bowl,,put it back together with fresh gas and you should be ready to go for the summer. always be sure to add fuel stabilizer to you fuel to keep your gas from going bad and gumming up your carb,.. You can get the stabilzer at any parts store even wal mart has it it the automotive section of the store..

Posted on May 26, 2011

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