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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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My 660 stihl wont hit a lick even if i squirt a little gas in it


1) Remove muffler and inspect piston/cylinder wall. Look for scoring on the piston face
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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

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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!

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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!

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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!

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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!

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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

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Blower was running fine, stopped for a while and when I atempted to restart, it wouldn't start. Doesn't even try. It always started on first or second pull. This is a two cycle engine. I put a new plug in...


Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated
Fuel starvation - 'lean fuel' condition
Basic things to check:
1) spark plug
2) spark arrestor in muffler
3) fuel lines and tank filter
4) turn adjustment needles out (counterclockwise) 1/4 to 1/2 turn
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
5) replace gaskets/diaphragms
b) use a spray carb cleaner to clean jets, holes, and body of carb

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1 Answer

Homelite Vac Attack II chord won't pull


Basics to check:
1) Spark plug - brown or dark brown - OK
- aluminum or silver - piston/cylinder scored
a) is it carbon or fuel fouled
b) is there spark

2) Compression - 125 to 150 psi

3) Muffler remove for inspection
a) exhaust screen clean or plugged
b) inspect cylinder wall/piston as the flywheel is slowly rotated

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1 Answer

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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 Garden

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