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Saw wont start

No spark when operated against cylinder head

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Saw.com

Posted on Oct 10, 2009


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2 Answers

MY SAW WONT START AFTER I PUT NEW PISTON AND HEAD


Do you mean that you replaced the piston and cylinder? The head is built into the cylinder. If you did change these did you also change the crank seals at the same time? Are you getting spark? Is it getting fuel meaning is the spark plug wet with gas when you try and start it?

Aug 01, 2012 | Makita DPC7311 73cc 14Inch Gas Powered...

1 Answer

Husqvarna 162 se wont start. No spark


Check the ingition module and gap between the module and flywheel. use a 0.25 feeler guage

Dec 29, 2011 | Husqvarna Garden

1 Answer

MY CHAIN SAW DOESNT WANT TO START,IT SOUNDS LIKE IT WANTS TO,BUT IT WONT START, WAHT DO THINK IS THE PROBLEM WITH IT


Do a complete tune up.
1-spark plug
2-carb filter
3-coil induction

And if possible try to open the piston cylinder head and clean the piston head and the head for carbon deposit.

If you need more help post back!
Thumbs and testimonial are welcome!

Jun 04, 2011 | McCulloch 16 Inch Gas Chain Saw MCC1635AK

1 Answer

I have a Poulan Pro 295 20 " chain saw that wont start.No spark from plug.Think the magneto is bad. Model no.952-051310 . Need opinion and part no. Thanks.


Do a basic test first, remove the top cover, pull the earth cut out wire from the terminal on the ignition unit ( this will iliminate any problems with the switch, or wires ) now try for a spark, remember that they work off speed of rotation so give it a good pull, make sure you use a good clean plug, well earthed against the cylinder. If there is still no spark, you will need to replace the unit, part no. 530039143

Feb 17, 2011 | Poulan Pro Chain Saw 46cc 20"

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

1 Answer

Stihl 038 av problem starting saw.


Basics to check for 'No-Start' condition:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

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

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
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Dec 03, 2009 | Garden

1 Answer

Engine will start but wont run when throttle is applied


Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled
b) is there spark

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


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
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Nov 25, 2009 | Mantis Tiller

1 Answer

Hi,my stihl ts400 wont start,theres a spark at the plug,I havent flooded it and theres very little compression when I put my finger over the spark plug hole when the plug is removed,can you help?...


Was this saw perhaps operated in a lean condition (metal transfer from the piston to cylinder wall)?
· Remove the spark plug wire and plug. Remove the muffler, 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?
Any spots or smears on the cylinder or deep scratches and gouges in the piston indicate the saw was operated in a lean condition. A repair estimate by your local Stihl saw shop should be considered. HTH
Lou
A few drops of 2-cycle oil in the cylinder before attempting to start it may allow you to get it running. A P&C will most likely be required for a long term repair.

Nov 23, 2009 | Saws

1 Answer

Husqvarna chain saw Model 141 running at high rpm's


You may wnat to inspect the intake manifold/boot that mounts inbetween the cylinder and the carb. Also, the impulse tube that comes from the bottom of the cylinder to the carb manifold or carb itself. Sounds like you are running a lean condition. You need to locate the source very quickly, or continued operation will permantly damage the saw. I have listed a few other things to check.
Please let me know what you find. rwvanlue

Basics to check:
1) Spark plug - brown or dark brown - OK
a) is it carbon or fuel fouled (black and carbon deposits)
b) is there spark

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

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
Chain Saws:
5) check impulse tube and intake boot for cracks or leaks
*if all of the above are OK and/or do not improve performance then:
Remove Carburetor
6) replace gaskets/diaphragms
a) use a spray carb cleaner to clean jets, holes, and body of carb
b) fuel pump diaphragm goes against the carb body,
then the gasket towards the outside
c) metering gasket goes against the carb body,
and the diaphragm goes towards the outside

Nov 13, 2009 | Husqvarna Garden

1 Answer

Chainsaw wont start


the ignition coil may be bad or a short from the wires connecting to the ignition coil.

Jan 18, 2009 | Ryobi Factory Reconditioned 18" 40cc...

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