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Craftsman chainsaw40cc engine clatters when I pull cord to start has good compression and spark

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Check a couple of things... pull the muffler off and look at the piston... if it's not smooth then bummer
check the ignition coil area and the recoil area

Posted on Oct 20, 2013

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6ya6ya
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Posted on Jan 02, 2017

steve_lima
  • 181 Answers

SOURCE: husky 372 xp stopped working?

you need to check to see if the piston is scored.pull the muffler off the saw and look inside.the piston is right there.if the piston is scored all you can do is change the piston and cylinder assembly.if the saw is new it might be under warranty.check with who you bought it from.most saws have a one year for consumer use.....let me know if this helped...................

Posted on Jun 02, 2009

  • 255 Answers

SOURCE: pull cord difficult to pull..removed from saw it

Make sure someone hasn't run this saw without the oil in the fuel mixture. It is possible it is dry and some galling is happening. Or - if this saw is equipped with a compression bleeder (for easier starting), this could be not functioning and you're pulling through the normal compression (which can be a bit feisty!). Check for misalignment of some type having to do with the pull starter - check that the cord spool isn't rubbing on the housing when you pull. Good luck.

Posted on Nov 30, 2009

  • 4088 Answers

SOURCE: Compression in cylinder too strong to pull starter

We have a Husky 435 that does the same thing. Found that the engine is trying to fire after first pull. Try setting the choke at 1/2 after first pull, but don't bump the throttle which will release 'fast idle'. This process seems to limit the 'kick back' effect. It also helps if you have a strong arm. Good luck!

Posted on Nov 25, 2010

  • 82 Answers

SOURCE: cannot start saw because of

Not being able to pull the start cord because of "compression" is usually a sign that the cylinder head is full of fuel and/or oil. Take the spark plug out and try to pull again. look at what is in the cylinder, fuel mix or chain oil. If the engine turns over, pull several time to clear the cylinder. Clean the plug and put it back. Gas/oil in the cylinder means it is leaking into the crankcase. If it is chain oil in the cylinder, there most likely is a crack in the crankcase. If it fuel look for a leak the allows the fuel to get into the crankcase when it is stored.

Posted on Apr 17, 2011

kel1guy2002
  • 3740 Answers

SOURCE: Can't pull the starter cord,

Hi and welcome to FixYa, I am Kelly
Remove the muffler and clean out the exhaust port and screen. You will have to disassemble the muffler and clean off or replace the screen item 8 of this link:
http://www.partstree.com/parts/?lc=echo&mn=CS-330T++S%2FN%3A+C08611001001+-+C08611999999&dn=7946

Before taking the muffler apart... unhook the spark plug and just pull it though with the muffler removed. If it pulls normally you know you have found the problem.

If it still pulls hard...check the exhaust port of the cylinder head for 2 tiny holes (not screw holes) Some have them some don't depending upon the year of the saw. If you do find 2 small holes that appear clogged with carbon... do your best to clean them out.

Thanks for choosing FixYa,
Kelly

Posted on May 15, 2011

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1 Answer

4 cycle craftsman mini tiller won't start,makes clicking noise when I pull the pull cord


The clicking noise might be significant...

In order to start and run an engine needs compression, timing, the correct amount of fuel reaching the combustion chamber and a good quality spark.

Discovering why an engine will not start is a process of checking and ensuring all the items on the list are functioning correctly. When you have done that the engine will start.
If the engine doesn't start then it is wise to go through the list again because something got missed the first time - maybe there isn't as much compression as there should be, maybe a valve is sticking or bad, maybe the timing got messed up, maybe the spark isn't good enough...

Pulling the starter 50+ times is a lot of unnecessary wear and tear on you and the machine. Take a deep breath and start again, do the work and do it well and three or four pulls should be enough.

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could be valve needs set. if it isn't opening at the right time it wont release compression for it to start. it may be the shear key in the flywheel has sheared if you have hit something like a big rock or log or something causing it to die suddenly.

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Stihl chainsaw MS460 Can't pull recoil


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1 Answer

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Remove the starter mechanism from the saw and try to turn the flywheel--it should turn freely except when the piston is rising against compression. If ok, pull the starter cord and watch for twisted cord or a damaged/split spool. Try to turn the spool CW by hand to see if it is bound up by something. Was the starter cord just replaced? If so, maybe the return spring was over-wound and can't be turned further. Hope this helps!

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need a little more information .. but look for the following .. take out the spark plug and look inside with a flashlight ... if the piston is moving with the rotation of the flywheel then you likely have a blown head gasket .. if there is no compression there wont be a load on the pull cord .. a cracked or damaged piston can also do this .. ... if the piston is not moving when you rotate the flywheel then you likely have a bad "shear key" sometimes called a "shear pin" .. thats usually a half moon shaped small metal part that keeps the flywheel locked rotationally to the crankshaft .. it is designed to shear off if there is an excessive sudden load on the engine .. the flywheel will then spin without turning the crankshaft .. the same thing will happen if you have broken the connecting rod .. (a rod failure is often preceded by lots of clatter from the engine) .. the head gasket or shear key are much more likely to be your problem .. if you cant see in the spark plug hole you might try using a straw to feel the piston motion .. its possible that without the spark plug in place the piston might move even with a bad shear pin .. because with no compression the piston will move freely .. if thats the case you can stop the piston motion with a wood dowell thru the spark plug hole .. if it moves in spite of your dowell resistance then consider the head gasket option ..

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