Question about Troy Bilt Tb70ss Gas Trimmer

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The trimmer starts and will run good but as soon as you let off the trigger it shuts down

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I had the same problem after less than one year of pretty hard use. Took it to a guy who works on small engine repairs. He said the carb has failed and either needs a replace or a rebuild. Replace is easy ion this but about $65. Also be sure to adjust the rocker arms per the maint schedule.

Posted on Jul 06, 2010

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Posted on Jan 02, 2017

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The trimmer starts fine, but as soon as touching the trigger, it dies. Even if you wait, it runs fine until yu touch the trigger and it dies, every time.


Most symptoms and problems such as you report, are commonly resolved by the following, check, clean, or replace:
  • fuel filter - located in the gas tank
  • Spark plug
  • Spark Arrestor- screen at muffler. When clogged up with carbon build up, engine no longer operates well
  • Carburetor- may need a new rebuild kit
And watch this...

And this one..

Oct 09, 2014 | Poulan Garden

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I have a 2012 craftsman mdl 316.711970. I follow all maintenance requirements. It will only starts when the choke lever is in position 1. It takes forever to prime it cause the primer button doesnt pop...


I don't think so either. I think you have crud built up inside your fuel tank, and it needs to be thoroughly cleaned inside, Your carburetor may also need to be thoroughly cleaned inside.

Jul 29, 2014 | Garden

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Poulan pro weedeater 330 runs but no power. boggs downs when full trigger pull


remove the muffler and try it if ok open the muffler and clean out the carbon from the screen

Apr 06, 2012 | Poulan Garden

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When I start my trimmer it runs fine until it gets down to the time to switch it to run and as soon as I switch over and press the trigger for gas it shuts down. please help!


With choke on it forces gas by suction through carb. That is a good sign of vavle body in carb stopped up with 2 cycle gas/oil mixture left in gas tank and not run completly out of trimmer and gas tank. You will need to remove carburator-disassemble it carefully not to tear any gaskets or diaphrams.Also inspect all rubber membrains for very tiny tears or wholes in them. If found rebuild kit will be needed.If not local auto parts stores carry carburator cleaner in 1 gallon container you will need to soak in overnight then use compressed air to blow through tiny orfices in valve body of carburator.If your remove low & high speed air mixture screws turn screws down( in clockwise ) just untill seated (count full revolution of turns on each one before removing them) Make sure to remove all rubber gasket,o-rings ect. before putting carb. in to soak overnight they will swell up and be no good in the morning if not. a good rule of thumb is to take digital camera and take pictures of every step before removal and use to help with rebuild of carb. (make notes) drain or run gas out of everything before setting it up not in use for awhile.you won't have these problems again also (seafoam carb cleaner poured into gas will help prolong old gas if used when gas is new and works great on cleaning out all fuel related problems with any and all combustable engines it can be found at advance auto parts,o'reilly auto parts) hope this helps you out.

Apr 13, 2011 | Poulan "Poulan" Pp325 17" Gas Brushcutter...

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Toro electric trimmer motor keeps stopping


Very possibly a bad switch or loose wire.

May 17, 2009 | Toro& Electric Trimmer

1 Answer

Gas Trimmer will not stay started


My straight shaft trimmer will idle but dies when the I pull the trigger.

Apr 03, 2008 | Ryobi 15" Electric Factory Reconditioned...

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