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Stihl km55 new ignition,gapped .012 has spark but won't start.i didn't adjust carb

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  • Paul Ghalloub
    Paul Ghalloub Apr 18, 2015

    It's a stihl km 55 kombi tool.

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  • Expert
  • 484 Answers

Drop a few drops of gas into the plug hole and see if it fires....if so, its not getting fuel through the carb. Check the fuel and impulse line for cracking or other deterioration. I wouldn't suggest dusting it with ether because too much could blow a hole in the piston or score the piston and cylinder wall. Some guys do though just to see if its not getting fuel...

What's the plug look like when you're trying to start it? Is it wet with gas? Is it dry? Is it carboned up? The plug can tell you a lot.

Posted on Apr 21, 2015

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6ya6ya
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Posted on Jan 02, 2017

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steve_lima
  • 181 Answers

SOURCE: stihl chainsaw 066 died

mr siegs
remove the muffler and look inside the cumbstion camber and look at the piston.if you see marks (score) on the piston the piston and cylinder are bad and need to be replaced.this is caused from a lack of lubercation to the cylinder,possible water in fuel,spraying starter fluid into the saw,bad oil to fuel mixture,old fuel has no lubercating value.any more questions please feel free to contact me

Posted on Mar 12, 2009

  • 491 Answers

SOURCE: I purchased a Stihl 036 chain saw at a yard sale.

CLEAN OUT FUEL LINES

Posted on Jul 20, 2009

dontbother10
  • 2220 Answers

SOURCE: stihl mod ms 361 would

A business card placed between the flywheel and module works quite well (the magnetic attraction even holds it in place).and is easy. Rotate it by hand when done to ensure there is no contact. HTH
Lou

Posted on Sep 24, 2009

  • 173 Answers

SOURCE: I have a Stihl MS210c

Make sure all the wires are hooked up to module.Then unplug ignition switch and test for spark.If you get spark then switch is bad.

Posted on Nov 17, 2010

  • 168 Answers

SOURCE: i have an stihl 028wb.it

Did you adjust the L screw on the carb to 3/4 open from closed and the H screw 1 1/4 turn open from the closed position. When you installed the new points, did you adjust the timing on them? Also, remove the chain and bar from the saw when you do this, you may find that the clutch could be damaged causing the chain to bind.

Posted on Nov 18, 2010

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The spark plug should be about 0.025" gap. With a fresh plug, the spark should be blue. If fairly weak looking, remove the cover over the flywheel and reset the ignition coil gap. Turn the flywheel magnets to just under the module, insert a thin business card into the gaps, loosen the module screws and let the module contact the magnets through the card. Tighten the screws, then turn the flywheel somewhat to release the card. Turn the flywheel one complete turn to make sure the gaps don't close further. Recheck for hot spark. Check the air filter and muffler for plugging. Hope this helps!

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1 Answer

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1 Answer

My fs55r wont start - got carb kit, new filter and sparkplur what next?


You need to make sure it is getting a nice strong spark. The electronic solid state ignition control module (coil) controls this and the contact legs on it have to be gapped about .010-.012" from the magnets on the flywheel. This goes on under the front engine cover. First, check for a nice blue spark. If it is weak or yellow, the coil needs adjustment. They fail rarely. A standard business card is about the proper thickness to produce the "air-gap" needed to create a a good spark.Also, make sure the plug has the correct gap on it.
If you have to check the coil, the front engine cover will have to be removed and moved forward to access it.Underneath the cover is the starter/recoil unit and under that is the flywheel and the coil. The coil will be attatched to the engine cylinder with a couple Torx screws about size T-15 or T-20.

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2 Answers

Coil flywheel air gapfor stihl 09 model


set the air gap at .011 to .012.inches,set carb high and low needles at 1 turn and 1 turne to start. after running it might take a minor adjustment to finish

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