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At full throttle the trimmer chokes off. what should I check?

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Spark Arester,Spark plug

Posted on Oct 06, 2009

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1 Answer

Weed wackier gas trimmer


didnt specify the make and model so generic answer ---check fuel mixture is correct --check the filter in tank is not plugging up--look for damaged / crack in fuel feed lines-look at spark plug --carb may need cleaning --exhaust port may need cleaning

Jul 04, 2016 | Garden

1 Answer

Trimmer just idles will not run full speed


check your choke cable for proper function; at full throttle, butterfly valve should be perpendicular to the throttle body. Also check your fuel filter for contamination. Stone should be all one color, and free to follow the fuel supply as you move the trimmer into different positions

May 03, 2015 | Garden

1 Answer

Hi Experts, I have a McCullough lawn edger/trimmer Mac-Pro I. I am having problems staring the engine. I can't remember whether I have to hold the throttle in whilst pulling the cord? Also,...


Yes, the throttle should be in the full in position. When starting, the choke should also be in the full on position.
If you can't tell if it is in the closed or open position, remove the cover that is over the carb where the air filter is and you should be able to see which way you move the lever for the closed or open position and mark it where you can see it. When starting put the throttle full on and the choke also in the full on position. It should usually start and stop right away. Now move the choke to the full off position keep the throttle in the full on position and it should start in 2 or 3 pulls. If it doesn't do the procedure again. While you have the cover off the carb check the air filter and if it is very dirty replace it or clean it off because a really dirty air filter could make it run rough or not start at all. I will gladly answer any questions. Best regards and good luck.

Dec 28, 2010 | McCulloch Lawn Care: Trimmer Plus...

1 Answer

Weedeater dies when you open choke


After you start it and are in the second stage of the choke (half choke ) let it run for awhile until it warms a bit then try openning choke and going to full throttle.

May 21, 2010 | Poulan 25cc 2-Cycle Gas Powered String...

1 Answer

Hard starting 4 cycle trimmer, 20 to 70 pulls


I got me one of these beasts and I can get her to fire for me in just 3 pulls.
(Oh yeah?! I can name that tune in just 2 notes!!)

Seriously....

Use that primer bulb. Use it with prejudice. Do NOT be afraid of it. What does this mean? Yes. Push it 10 times.

Choke full on.

Full throttle, choke fully on, give it a tug. You should see it hit and give a whitish puff of smoke.

Half choke - Position 2 - Full throttle, another tug. Should fire and rev with you still squeezing that throttle at full. Release throttle and LET IT IDLE at half choke for 30 seconds.

Move the choke completely off, continue to let trimmer idle for at least a minute to warm up the oil and block.

Git to whackin' that yard down. :D I just love my 575ES! (Polesaw attachment for the win)

May 07, 2010 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

Hard start tb475ss troy built weed wacker when i close the cold start lever it starts but its 75 degrees out its like the primer ball is inop but i see fuel moving through the lines when priming did not...


These 4 cycle trimmers need to be primed 10x before a cold start. The bulb will feel *firmer* on the last two or three depressions and you'll know that the carb is primed.

Full choke and and full throttle on first tug should see it hit once with a puff of smoke. Second start attempt should be in choke position two (half choke) and with full pressure on the throttle. Should rev to life on start attempt. Let the engine IDLE for 30 seconds, moving the choke to off at the end of the waiting period. Let engine idle to warm another full minute with no choke, then set to work!

May 02, 2010 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

Craftsman 32cc Trimmer Runs with choke at idle, then stalls


Sounds like somewhere you have a air leak. Most likely it's somewhere near the carburetor intake or maybe the carb itself. Could be a line from the primer if it has one and i do believe it should that could be leaking or loose. Good luck.

Aug 02, 2009 | Craftsman 25cc Gas Line Trimmer

1 Answer

Only runs on full throttle


Are you saying full throttle, or full choke? if full throttle, you should be able to set the idle up. the idle screw will be the one when you give it gas, it will be the screw on you'r throttle linkage. If full choke, maybe the spark arrestor is plugged. You can remove it by removing the muffler.It would be between the muffler and cylinder head. You don't need this to run.I hope any thing I posted will help.

Jun 19, 2009 | Poulan 25cc 2-Cycle Gas Powered String...

2 Answers

Stops when given full throttle


Most likely carburetor needs adjustment.

May 15, 2009 | Garden

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