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neil wilson Posted on Jun 16, 2019
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Brand new chainsaw MS231 251 When cold starting, I am squeezing the throttle trigger lockout and he trigger at the same time as per p28 of manual. They don't stay locked. Aren't they supposed to?

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Vernon Taylor

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  • Garden Master 7,446 Answers
  • Posted on Jun 16, 2019
Vernon Taylor
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I expect the design of your new chainsaw will be similar to many small engined tools where owners often discover they need an extra hand.

Usually the throttle is opened (trigger pulled) and then the trigger lock is pressed and the trigger released. The lock will hold the throttle partway open; freeing both hands to hold the tool steady and pull the starter. The partway open throttle makes starting easier and once started, the engine will run fast aiding a quick warmup and less chance of dying or fading.
Once the engine has warmed enough so the choke can be disengaged, a quick squeeze of the trigger will allow the trigger lock to disengage...

5 Related Answers

Anonymous

  • 2 Answers
  • Posted on Oct 27, 2008

SOURCE: poulan 3400 chainsaw throttle trigger

Its a missing or broken spring in the handle(trigger). If you look inside the handle you should see a circular spring around the post of the trigger. This spring returns trigger to idle position. If its missing or broken the trigger won't spring back.

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Anonymous

  • 87 Answers
  • Posted on Apr 09, 2009

SOURCE: how to fix throttle trigger on a poulan chainsaw?

The trigger, lockout or trigger/lockout spring has failed of may have debris stuck in handle. remove handle cover and inspect. If parts broken follow this link for parts breakdown.

http://www.ordertree.com/modelinfo/PWE/PP4218AV/75.PP4218AV.1.7.1.html

#1 Taper

Jim Parker

  • 1041 Answers
  • Posted on May 31, 2009

SOURCE: The weedwacker dies when I squeeze the throttle trigger

You need to clean the carburetor. Remove and disassemble carb. Use a den Tek Brush, (used to clean between teeth), to clean the small portals in carb. Use a carb. cleaner while cleaning. Make sure the small screen in carb. is free of debris. The smallest of paticles can cause the carb. not to run right. Reassemble the carb. and try starting. If there is no change, then you will need to buy a carb. kit for your trimmer. Replace all appropriateparts: gaskets, diaphragm, needle valve, and the small screen.

Jim

Silverdragon

electronic & computer repair& servicre

  • 12061 Answers
  • Posted on Mar 26, 2010

SOURCE: stihl 009 chainsaw

http://www.ultimatehandyman.co.uk/manuals/stihl/19.pdf
manual above it is all in there..

davei197

  • 3 Answers
  • Posted on Aug 18, 2010

SOURCE: Craftsman model 358.791042, gasoline weedwacker wont stay running

The high speed needle valve needs adjusting and it takes a special splined tool to adjust it. I currently am trying to find where I can purchase the tool to adjust the high and low carburator screws.

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I'm guessing from the statement that it "will not work to increase speed" that you have been able to successfully start the chainsaw.
I have to look at this with the assumption that you haven't run a chain saw before, so bear with me if some of this is excessively simple.
If the throttle trigger does not move, something is jammed. The handle for the choke should automatically move to the retracted position when you pull on the throttle. If it doesn't, see if the trigger will move after you push the choke handle back in.
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more information please..

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5. click 'on' switch up one position to 'half choke'
6. pull saw over again, saw should start running and be revving high.
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It turns out the solution for me was that the starting instructions in the manual are not really complete, there is another step that aids in starting: it needs some throttle. The chainsaw does not like to start with power at idle. After setting the switch to on and setting the choke, as the manual says, before attempting to start, squeeze the throttle while pressing the side button to lock it. For me, this allowed it to FINALLY start with only a few pulls. I learned this when I ran across this video:
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Hope this helps anyone else who runs into this.
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How to fix throttle trigger on a poulan chainsaw?
The trigger, lockout or trigger/lockout spring has failed of may have debris stuck in handle. remove handle cover and inspect. If parts broken follow this link for parts breakdown.

http://www.ordertree.com/modelinfo/PWE/PP4218AV/75.PP4218AV.1.7.1.html
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