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My chainsaw, after runnig ok for 15 minutes, is now running sluggish. So, when i press the trigger the saw runs at normal speed for around 3 seconds then begins to die. I wait for a few seconds then the same happens... Any idea...its recently been serviced and has run ok for the last two weeks...

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It sounds like a fuel issue. on my Stihl (390 )saw I had that same problem and I found that the fuel line inside the fuel tank was kinked and split and sucking air ( not fuel ). also check to make sure your gas oil mix is correct ( start fresh when in doubt ). it also can be a idle issue ( Fast idle or Slow idle ), but since you just had it serviced - I would look at the fuel line and fuel first. please let me know what you find and if that does or does not solve your problem,, there are a few more things to check. ( also - check to see if the air filter is clean and clear ,, brush it off if dirty ).

c...

Posted on Dec 29, 2010

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Also the screen in the muffler can get plugged . Enough air can get out of the cylinder to run at lower rpms but builds a back pressure at high rpms . Remove the exhaust and try running the saw.

Posted on Oct 05, 2014

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1 Answer

Settings for mixture screws


Most Chain Saw Engines Have Three Carburetor Adjusting Screws:
1. Idle Speed/Throttle Stop - This is the adjustment that controls how much the throttle valve (butterfly) stays open when the throttle trigger is released. If this adjustment is set too low, the engine will die when the throttle trigger is released. The throttle valve (butterfly) simply cuts off the supply of combustible air/fuel and the engine stops. If this adjustment is set too high, the high idle speed will cause the centrifugal clutch to engage and the chain will run. This is a dangerous condition and should never be allowed.
2. Low Speed Fuel Adjustment (marked L on carb, this is the low speed jet)- This is the adjustment that controls the proportion of fuel in the combustible air/fuel mixture at idle speed. An adjustment that is set too rich will cause the engine to load up and die at idle speed. A mixture that is too lean will starve the engine and cause it to race or surge. An extremely lean adjustment will cause the engine to die, too.
3. High Speed Fuel Adjustment (marked H on carb, this is the high speed jet) - This is the adjustment that controls the proportion of fuel in the combustible air/fuel mixture at cutting speed. It would not be accurate to say that this is the most important setting, because all of these adjustments need to be accurate for a saw to perform its best, but this is the adjustment that determines how the saw runs in the cut. An adjustment that is set too rich will not allow the saw to reach the RPM level necessary to build maximum power. Throttle response may also be sluggish and the engine would smoke and perform poorly. A mixture that is too lean will allow the engine to reach an RPM level where bearing failure and cylinder seizure are likely. It will also lack power in the cut and tend to run very hot.
The preceding information briefly explains rich and lean running conditions. It also identifies the three adjustment screws and their function. It should be noted that some chain saws lack the high speed adjustment needle. These saws have what is called a "fixed jet" which is set from the factory. "Fixed jet" carburetors are used to prohibit the saw operator from setting the adjustment too lean and damaging the saw. Unfortunately, they also often prohibit the saw from achieving maximum performance.

Apr 11, 2016 | Garden

1 Answer

Cant get enought gas


repair - What should I check if my chainsaw fails to start ...

diy.stackexchange.com/.../what-should-i-check-if-my-chainsaw-fails-to-s...
Feb 26, 2013 - Does anybody have any idea what I can do to get my chainsaw started?... Clean carburetor and fuel lines, especially if it may contain old fuel. ... that prevents it from generating enough current to sustain repeated firing of the spark plug as the engine turns. ... Your muffler is pluged up your saw can't exhaust.

Stihl Chainsaw - starts but won't run - GardenWeb

forums2.gardenweb.com > Garden Forums > Tool Shed
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chainsaw won't start - any ideas? [Archive] - Straight Dxxe ...

boards.straightdope.com > ... > Main > General Questions

21 posts - ‎11 authors

Jan 31, 2016 | Garden

1 Answer

Choke trigger on the handle will not lock to start the chainsaw


more information please..

To lock the choke on:-
1. depress dead mans trigget on top of back handle
2. squeeze throttle trigger fully in.
3. slide on switch fully down to 'full choke' position. 'it should stay there'.
4. Pull saw over until it fires once.
5. click 'on' switch up one position to 'half choke'
6. pull saw over again, saw should start running and be revving high.
7. 'blip' throttle, saw should stop revving and run on tick over.

Dec 31, 2012 | Stihl MS181 14" Chainsaw

1 Answer

I have a series 51 husky saw. it starts and runs normally until it gets up to operating temps. then it stalls out and either refuses to restart or just won't restart until it cools down again....


sounds like air fuel mixture screws are out of adjustment..start with the on marked (L)..this is the low speed(idle) adjustment...turn it in all the way just until it stops..but be gentle..then you wnat to turn it out 1 1/2 turns as a starting point..start the engine and adjust it until you get a smooth idle...next, with the saw running, pull the trigger and you should have a smooth response from slow to fast...you can adjust the (H) screw until you get good high speed operation...if these adjustments don't fix the problem thenm yoou may need to have the carb rebuilt( a carb kit is usually only 15-30 dollars)

May 09, 2011 | Husqvarna Garden

1 Answer

Saw will start. runs a little sluggish at first. then it will smooth out and rev high and run strong for a few minutes then gets sluggish again and dies. will not start again for 5 to 7 minutes minimum....


Being springtime, I'm thinking you may have had your saw sitting all winter with last years gas in it. If so, you'll need to clean the carburator and spark plug real good, then put fresh gas in it. Always remember to run your saw out of gas before putting it away. Gas only stays fresh for a few weeks and will foul up your sparkplug as well as plug up the inside of your carb when it gets stale.

May 03, 2011 | Garden

1 Answer

I have a 16 inch gas poulan chainsaw. I can't


Hi Speed circuit clogged in Carb.

Remove clean and soak blow out jet, Replace spark plug.

Also verfi Oil mix, add a fuel stabiliser if using fuel with ethanol.

Hope this tip helps.

R/
David

Jan 27, 2010 | Poulan 1630 16" Chain Saw

2 Answers

Trigger on poulan 3314 does not control speed. Saw runs at constant speed, somewhere above fast idle.


Open the cover over the air cleaner so that you can observe the action of the throttle cable and carburetor lever. Operate the throttle--normal action is lever wide open at full throttle and lever resting on idle stop screw when throttle released. If action is restricted, disassemble the handle where the throttle trigger is located and clean out the sawdust. Recheck throttle action. The throttle cable shouldn't require lubrication. Clean the air filter and check the operation of the engine. Hope this helps!

Jan 27, 2010 | Poulan Pro 16-Inch 38 cc Anti-Vibration...

1 Answer

My eager ****** chain saw will not stay running ?


The 3 adjustment screws are Idle, high and low.
First figure out which screws are which adjustment. Tighten the screws then turn them 1 full turn.
Then start the saw and get it warmed up. Work on the high adjustment. This does take a little while. after you get the saw running at high speed work on the low speed.

Apr 25, 2009 | McCulloch MC1275 Steam Vacuum

1 Answer

Saw runs for 3-4 minutes then dies


check the spark plug
change the seals with new ones
check compression

regards Mihai71

Nov 26, 2008 | Echo 30.1CC Chainsaw With a 14 In.bar and...

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