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Engine will not roll over using pull cord. removed spark plug and muffler. looked at cyl. wall. no scoring. when i rool engine by hand as the piston gets to the top of cyl. has slight binding homelite 385

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Sounds like possible piece of carbon sitting at the top of the piston or top of cylinder.when the piston gets to top dead center it's trying to squish the carbon not letting it roll over smoothly with recoil.

Posted on Mar 13, 2009

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K750 got it started briefly after 30 pulls and then it shut off seems its not getting any fuel. I changed fuel line and filter spark plug. It gets good spark. Help

check your compression, then make sure the fuel vac pulse line if it has one is not cracked, this creats vacumn when engine is rolled over which in turn pulses your fuel pump to pump fuel through carb. look in the spark plug hole with flashlite and look for scores in cylinder and piston, maybe remove muffler and look at cylinder with flashlite and make sure your rings aren't cooked to piston causing low compression. Sorry I got carry'd away, make sure your fuel filter is clean, fresh fuel and clean your carb and check diaphrams for being stiff if so replace them. Good Luck

Aug 02, 2011 | Husqvarna Chainsaws

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I am unable to pull cord to start, on my Cainsaw model 235.

Remove the spark plug and try to pull the starter--if ok, open the throttle and pull through several times to expel excess fuel from the cylinder. Check for blue snappy spark at the plug after this--if weak or nothing, try a fresh plug gapped at 0.020". If the engine still doesn't turn after removing the spark plug, it may have been run without oil in the fuel which will cause serious damage to the piston/ring(s) and cylinder. Remove the muffler and inspect these parts through the port behind the muffler--if badly scored, they will need to be replaced--an expensive process even if you do the work yourself. You might consider a new replacement saw if an estimate is very high. Hope this helps!

Dec 10, 2010 | Husqvarna "Chain Saw - 16" Bar, 3 Hp

1 Answer

I have a Stihl ms310.. It won't fire up. I cant pull the cord.

Remove the spark plug to see if it has become flooded--it will blow fuel out when you pull the starter. If no help, then suspect that the engine has been run without oil in the fuel which will cause severe scoring of the piston/ring(s) and cylinder wall. Remove the muffler to check through the port behind it. If it is, try spraying some WD-40 onto the piston to see if that loosens the piston. The fix is to replace the cylinder, piston, and ring(s), then purge all of the old fuel from the tank, lines, carburetor, and primer pump. When mixing fuel for the machine, use only a modern synthetic saw oil, and be sure to shake the container thoroughly just before filling the tank each time to prevent oil starvation. Hope some of this helps!

Nov 28, 2010 | Chainsaws

1 Answer

I can't pull the start rope on my redmax backpack blower. I've only had it a couple of months and the last time i used it, i used it until it ran out of gas. It turned a little colder and hasn't been...

Remove the spark plug to see if that makes it easy to pull the starter. If it does, then pull the cord rapidly several times with the throttle wide open to expel excess fuel. If no help, then suspect that the engine was run without proper oil mixed into the fuel--remove the muffler and look at the piston and cylinder wall for severe scoring. If it is, the piston, ring(s), and cylinder will need to be replaced--an expensive repair because warranty will not cover damage of this type! Hope this helps!

Nov 13, 2010 | Chainsaws

1 Answer

Very hard to pull start.

Two possibilities--one, the engine is flooded and the spark plug needs to be removed, then open the throttle and pull the engine through smartly several times to expel excess fuel. Check the air cleaner for plugging. Second, the engine may have been run without oil in the fuel which will result in the piston /ring(s) scoring itself and the cylinder wall severely. Remove the muffler and watch the piston as it travels the cylinder while pulling the engine through slowly. Any heavy scoring will necessitate replacement of the cylinder, piston, and ring(s)--an expensive process if you farm it out. Hope this helps!

Nov 09, 2010 | Chainsaws

1 Answer

Chainsaw starts but will only run for a short time and then quits

Suggest that you don't use the carburetor cleaner as it disturbs the fuel mix ratio. Use it only with 4-stroke engines. 2-stroke engines depend on the correct quantity and quality of oil mixed with the fuel for engine lubrication--if starved for oil, it will quickly ruin the cylinder wall, piston skirt, and rings. Remove the muffler and spark plug--inspect the cylinder and piston skirt/rings for any severe scoring while pulling the engine through slowly. If ok, check the muffler for plugging while it is off, and check the air cleaner for plugging as well. You didn't state completely what your problem was--help. Hope this helps1

Jun 04, 2010 | Husqvarna 450 e-series 18" Chain Saw

1 Answer

Need help on chain saw

This sounds like the engine was run without oil in the fuel. Remove the muffler and spark plug so that you can look at the cylinder wall and piston skirt. If these surfaces are badly scored, the compression in both crankcase and cylinder head will be nearly non-existent. This will prevent any intake of fuel into the engine. Replacing these damaged parts plus labor will likely exceed the cost of a new similar saw. Hope this helps!

May 20, 2010 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

2 Answers

Ryobi Chainsaw won't turn. removed pull cord asembly and that moves fine. seems like the engine has seized. Starter assembly won't turn at all. Have removed spark plug and replaced with no change.

Starter Handle difficult to pull:
1. Remove the starter cover.
· Inspect the flywheel and crankshaft under the starter cover. Are the woodruff key slots on the crack shaft and flywheel aligned and the key intact? If not; Please consider taking the saw to a good local saw seller/mechanic for a written diagnosis before authorizing any repair, if yes continue.
· Does the starter operate smoothly? If yes, reinstall the cover and continue with 2, if not repair the starter.
2. Is the saw equipped with a decompression valve? Yes continue, no proceed with 3.
· Leave the ignition off, set the valve and pull the starter.
· Pull gently to release the valve. Is there a difference in the effort required?
· If yes continue with 3, if no repair or replace the decompression valve.
3. Was this saw perhaps operated in a lean condition (metal transfer from the piston to cylinder wall)? This may be caused by many things including but not limited to; leaky intake connections at the engine or carburetor; leaky crankcase seals; cracked fuel delivery lines; running on gasoline containing no 2-cycle oil.
· Disconnect the spark plug wire and remove the plug. Remove the muffler (clean it and the spark arrestor before reinstalling), hold a light at the plug hole and inspect the cylinder through the exhaust port. Is it smooth and shiny or does it appear speckled with dull gray spots or smears?
· Pull the starter slowly, inspect the piston as it rises and falls. Is it a dull gray without scratches and gouges?
· Hold the light at the exhaust port and look through the spark plug hole, inspect the cylinder above the exhaust port. Is it shiny and smooth or speckled with gray spots or smears?
Please Note: Any spots or smears on the cylinder or deep scratches and gouges in the piston indicate the saw was operated in a lean condition. Repair of this on a home owner quality saw often exceeds replacement cost. A repair estimate by an independent saw shop should be considered.

If you have more questions or need additional help please reply below and I will get back to you. Thank you for using FixYa and Good Luck. HTH

Apr 01, 2010 | Ryobi Factory Reconditioned 18" 40cc...

1 Answer

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...................

May 15, 2009 | Husqvarna Chainsaws

1 Answer

Can,t hardley pull starter cord. I've removed muffler and carb. It will pull fine if the spark plug is removed (w/or with carb and or muffler . this is a poulan pro 18"

What i have to occasionally do for a chain saw after it sits all winter is to put something like WD40 in the spark plug hole and crank it over several times. What happens to me is that the piston gets gunked up from the gas that ran down into it during the winter and it won't crank over hardly at all. This is probably your problem. I have also found that if i store my saws with the tank down, the gas cant get into the carb and do this. (Although it's better to drain tank).
If this has been a running saw instead of a stored one, you probably need a rebuild kit if the piston is scored.

Apr 14, 2009 | Poulan Pro Chain Saw 46cc 20"

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