String Trimmer Won't Pull or Start


Old 01-28-06, 12:14 PM
Thread Starter
Join Date: Jan 2006
Posts: 2
String Trimmer Won't Pull or Start

Iíve had a Troy-Bilt 2-cycle string trimmer model TB75SS for a little over two years (just past the warrantyÖ). Recently I was using it when the engine cut out. On trying to restart it, the pull start was much more difficult to pull and I couldnít get it going.

After doing all of the normal maintenance checking, I brought it in for repair and was told that the ďignition coil (?), starter rope, air filter and spark plugĒ needed to be replaced for a total of $100. Not only is this almost the price of a new one, but I didnít think that was the problem to begin with, so I didnít have it serviced.

I now have it partially taken apart. Iíve noticed that with the spark plug out, the pull start is easy to pull and the cylinder moves fine. Itís only with the spark plug in or when Iím blocking the plug hole does it become extremely difficult to pull. I have the muffler off, so it isnít that or the spark arrest screen being clogged. Iíve also tried cleaning inside the cylinder with carb cleaner and soaking it briefly with oil, all with no luck.

Any ideas or help would be greatly appreciatedÖ
Sponsored Links
Old 01-28-06, 03:44 PM
v8driver's Avatar
Join Date: Sep 2005
Posts: 767
so you've made sure the exhaust port was clear? your right about not needing that stuff...... they were trying to get your money for mostly unneeded stuff. starter rope ain't broken, they're not sure the plugs fouled or the ignition coils bad (most likely not) and the air filter needs replacing, more then likely foam, and its owner replaceable, cleaned and oiled by the owner.
Old 01-29-06, 05:10 AM
Join Date: Jan 2006
Location: Owen Sound Ontario Canada
Posts: 541
Just a stab in the dim here________
How about this:
You are use to how the machine feels when pulling it over, and having the ignition of the fuel help spin it over, and now if the ignition is failed, you feel more resistance from the machine?
I would first check for spark.
If I had a friend with a trimmer, then I would ask to pull theirs over with the spark plug disconnected to be able to get a feel for the machine with no spark.
If it is "stiffer" then other machines then I would wonder if the mach..............
Look for spark first.
Old 01-29-06, 10:37 AM
Thread Starter
Join Date: Jan 2006
Posts: 2

Thanks to you both for the responses. Turns out that I'm not getting a spark after all, even with a new spark plug. It looks like it's part #753-04336 ("module assembly" in the manual) that is the culprit. It's about $40 online, so hopefully I'll be able to fix this myself for about half the cost.

To answer your question, it is definitely much more difficult to pull than before. It's amazing that the spark can make such a difference just with pulling the rope. Thanks again for the help.
Old 01-29-06, 09:49 PM
cheese's Avatar
Forum Topic Moderator
Join Date: Jul 2001
Location: USA
Posts: 16,820
Did you make sure the spark plug was grounded when checking for spark?

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Thread Tools
Search this Thread
Display Modes