Question about Troy Bilt Tb425cs 26cc 4 - Cycle Curved - Shaft Gas Trimmer with Ez - Start and Speed Spool

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My TB425CS will not start. I have checked the

My TB425CS will not start. I have checked the spark plug gap and that it is sparking. I have also checked the filter, spark arrestor and the gap on the rocker arms. all is good, but still will not start. Someone please help
Thanks

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Wheres the fuel ???
pluged line or carb may b

Posted on Jul 30, 2009

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Model TB425CS WHAT IS SPARK PLUG GAP


Al, .025" is the plug gap for your trimmer,page 20 in your manual. There may be a recall on your model to do with safety.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
http://lawnandgarden.manualsonline.com/manuals/mfg/troybilt/tb475ss.html
Troy Bilt Model TB425CS Parts
Troy Bilt String Trimmer Sold at Lowe Recalled for Laceration Hazard

May 15, 2016 | Troy-Bilt 4-Cycle Curve Shaft Gas String...

1 Answer

Choked and died while idling ,i try to start it again wouldnt start ,could itbe a timing belt ??


More likely it is a fuel problem. but could be a spark problem (timing belt has to do with spark) or least likely it could be the air intake. To check if you have the proper spark (coming due to a good timing belt) pull the number one spark plug and use a gapping tool (it's cheap tool but works good) to check the spark plug. If the spark plug has the correct gap then turn the key to watch if it sparks if it does't spark try a new plug if that doesn't spark you may need a timing belt. To check if it is the timing belt you do not really need to check the gap of the plug but if you already have the plug out and it is not the timing belt this information could be very useful. With more info I could probably narrow it down for you, post back if you like.

Mar 25, 2014 | Subaru Impreza Cars & Trucks

1 Answer

Need do know the spark plugs gap


If you're replacing the spark plugs in your car engine, you'll need to set the gap before reseating the spark plug. The gap is the distance electricity arcs between the ground electrode and center electrode. The gap must be set correctly to ensure maximum performance. Here's how to set the gap of a spark plug.

  1. Remove the spark plug wires. Use a socket wrench to remove the spark plugs from their chambers.
  2. Clean the spark plug if you are not replacing it with a new one. Remove all dirt and debris from the spark plug.
  3. Check the owner's manual for your car (or any appliance with spark plugs) to find out the recommended gap setting.
  4. Use a gap tool to check the gap of the spark plug. Slip the tool between the ground electrode and center electrode. The gap tool should fit snugly at the recommended gap width indicated on the tool.
  5. Push the tool between the electrodes a few times to ensure proper gap. If the gap is too wide, push the ground electrode firmly against a flat surface to narrow the gap and then check again with the gap tool.
  6. Repeat Step 5 as necessary until you reach the correct gap. Reseat the spark plug and reattach the spark plug wires
Good Luck

Dec 10, 2010 | 1997 Pontiac Grand Am

1 Answer

Trimmer dosen't start. Started one day - the next day nothing. I've replaced the plug, checked for spark (seems weak),gapped the ingition module, tried carb cleaner in the cylinder, and still won't go....


When you gapped module did you set it to Manufacturers spec.....extremely important, also supposed to use brass feeler blades to gap. Gap is usually 0.010" inch. Also ensure that the flywheel magnets are NOT rusty.

Timing will alter if flywheel key is worn.

Is fuel getting through as the carby has a fuel pump diaphragm in it also.

Have you trieds pulling choke when it splutters, will ID fuel stravation??

Jan 08, 2010 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

I am able to crank the trimmer but it does not stay on. in the past it worked just fine but sat unused for roughly 4 months and now this. we own a TB425cs string trimmer. how do i fix this issue?


1) Change out the old fuel (not just adding fresh but pouring out the old and replacing it entirely) and check the engine oil.

2) Check muffler and/or spark arrestor screen for restrictions.

3) Clean and reinstall spark plug (check gap).

4) Replace inlet screen INSIDE the carb. (It is located directly under the inlet needle.)

Try each of these as needed.
Hope this helps!

Oct 01, 2009 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

Flywheel removal from TB425CS


YOU MAY HAVE TO USE A PULLER FOR THE FLYWHEEL I CAN'T SEE ANYTHING ON THE BREAKDOWN OF THE ENGINE THAT WOULD SHOW ANY THREADED HOLES FOR BOLTS TO REMOVE THE FLYWHEEL

Sep 17, 2009 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

Troy-Bilt TB425CS trimmer hard to start, won't accelerate


Hi the key is moulded as part of the flywheel on most machines these days which doesent take much to sheer off , By the sounds of it this may well be your problem.

Sep 08, 2009 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

2 Answers

How to replace sparl plugs on a Jeep Cherokee?


Hello, I hope this info helps...(subytech1)...REMOVAL
In this engine, each individual spark plug is located under each ignition coil.

  1. Prior to removing spark plug, spray compressed air around base ofignition coil at cylinder head. This will help prevent foreign materialfrom entering combustion chamber.
  2. On this engine each individual ignition coil must be removedto gain access to each spark plug. Refer to Ignition CoilRemoval/Installation.
  3. Check condition of coil O-ring and replace as necessary.
  1. Inspect spark plug condition. Refer to Spark Plug Conditions.
CLEANING
Theplugs may be cleaned using commercially available spark plug cleaningequipment. After cleaning, file center electrode flat with a smallpoint file or jewelers file before adjusting gap.

CAUTION: Never use a motorized wire wheel brush to clean sparkplugs. Metallic deposits will remain on spark plug insulator and willcause plug misfire.

ADJUSTMENT

Setting Spark Plug Gap - Typical
Check spark plug gap with a gap gauge tool. If the gap is not correct,adjust it by bending ground electrode. Never attempt to adjust gap bybending center electrode.

INSTALLATION

CAUTION: This engine is equipped with copper core groundelectrode spark plugs. They must be replaced with the same type/numberspark plug as the original. If another spark plug is substituted,pre-ignition will result.

Special care should be taken when installing spark plugs into cylinderhead spark plug wells. Be sure plugs do not drop into plug wells asground straps may be bent resulting in a change in plug gap, orelectrodes can be damaged.

Always tighten spark plugs to specified torque. Over tightening cancause distortion resulting in a change in spark plug gap or a crackedporcelain insulator.

  1. Start spark plug into cylinder head by hand to avoid cross threading.
  2. Tighten spark plugs to 27 Nm (20 ft. lbs.) torque.
  3. Before installing coil(s), check condition of coil O-ring andreplace as necessary. To aid in coil installation, apply silicone tocoil O-ring.
  4. Install ignition coil(s). Refer to Ignition Coil Removal/Installation.

Aug 07, 2009 | 2000 Jeep Grand Cherokee

1 Answer

Despite new spark plug properly gapped, cleaned & lightly oiled filter, fresh gas, and CHOKE IN PROPER POSITION, my trimmer (purchased 10/9/2004) still hesitates and then stalls. Cannot rev it up. Is...


Check your spark, as you may need to respace the magnetron on this if it isn't sparking continually. Just loosen the two bolts holding it on, place a notecard (3 x 5) in between it and the flywheel and then tighten it down and against the notecard. This likes to loosen up on small engines and is overlooked easily. Let me know how this turns out.


Benjamin

Jul 24, 2009 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

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