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I have a 028 super sthil chainsaw I have replaced the carb.,fuel line and filter put in new cas mix,and checked firing is good.but saw will not start what is next step

I cannot get the saw to start, I have changed the fuel, fuel line, filter, carb, and checked and I am getting good fire

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  • Eugene Rounds Dec 02, 2014

    Hi James Michael Pennington, I want to help you with your question, but I need more information from you. Can you please add details in the comment box?
    Is the plug wet? if so have you checked spark arrestor screen and the compression? Most 2 cycles need at least 100 psi to start.



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I am a little out of practice with the 028, but I do remember that they used to sometimes shear/break off the flywheel key, if ALL else fails, take off the flywheel and check the key. To stop the crankshaft turning when you are unscrewing the flywheel nut, jam a length of thick recoil cord down into the plug hole (remove plug first of course) while the piston is just before the top of its travel. Then revolve flywheel in an anticlockwise direction until it jams. Remove the cord afterwards!!!! and replace the plug.

Posted on Jan 02, 2015

  • James Maidment
    James Maidment Feb 02, 2015

    After the above steps insert the cord into the plughole again and remove the flywheel nut (13mm spanner or socket) and being very careful you can lever off the flywheel by putting a large (1/2" wide at least) screwdriver behind the magnet on the flywheel and against the crankcase (not the fins on the cylinder) and lever but not too hard and then revolve the flywheel 180 degrees (half a turn) and repeat the procedure still just trying to rock the flywheel a little. Keep doing this (revolving a half turn each time) until the flywheel loosens. It may take a number of times, but don't rush it. Eventually the flywheel will loosen be careful not to drop the flywheel key (a 1/4" long half moon shaped woodruff key) and then you can check the key to see if it is broken. Some of the 028's had integral keys moulded into the flywheel some had a separate key. If the key is broken, remove the bit that is in the crankshaft as well as the thin strip which is sheared off and replace the key (if the key is part of the flywheel then you will have to replace that too) and then replace the flywheel on the crankshaft.. Tighten the flywheel nut to 33Nm (24ft lbs) and reassemble the rest of the saw and try it out.


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Check the obvious first, check the spark plug and check for fire from the coil, check the spark plug. Then check compression. You have to have good compression for these saws to run.

Posted on Dec 31, 2014

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Sounds like trash on jets remove carb and clean and rebuild it

Posted on Dec 03, 2014

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SOURCE: Husqvarna 350 running problem

Pull off the exhaust, does the piston look ok?
If scored thats not good.
If ok check fuel filter , pressure test lines or remove and check for cracks. Just a start but check easy stuff 1st or get back to me with more info, cheers

Posted on Dec 28, 2008

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SOURCE: wont start with new plug. I can smell gas, but none on plug

Check the start stop switch, sometimes they can get dirty causing the saw not to get spark. Also maybe check Your air cleaner. if it's clogged it may be flooding itself out?

Posted on Feb 16, 2009

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SOURCE: Poulan saw will not start

This is not really a solution.... I can't post a comment. I think you know where I was going with the flywheel thing - whether or not the timing is right. I thought you'd pulled the flywheel yourself, and sorry, I'm not sure how to pull it. I'm assuming this is a 2 stroke motor... you might want to just check that the piston is near top dead center when the magnet on the flywheel hits the coil..... you can stick a pencil or anything long through the spark plug hole to give you an indication if the piston is at the top of the cylinder or not. Let me know how it goes!

Posted on Mar 14, 2009

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SOURCE: poulan wood shark 1950 wont start spark plug has

Try to squirt a little gas in the carb and see if it pops or tries to run for a short time. The diaphram in the carb is probably old and hard. That would be the first place I would look.

Posted on Nov 08, 2009

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SOURCE: poulan saw wont run

Clean the muffler spark arrestor screen and check the cylinder port for carbon build-up at the upper edge. Try presetting both carburetor H and L adjustments (from lightly CW stops) 1-1/2 turns CCW each. Start the engine and allow to warm up. Pull the throttle wide open and adjust H CW until the engine speed increases, but still 4-stroking. Correct setting is when the engine 4-strokes, but immediately 2-strokes when cutting. Allow to idle and adjust L for smoother running, yet allows the engine to 'follow the throttle'. Set idle speed to keep the engine running, but doesn't try to move the chain. You may have to look closer at your carburetor if the above doesn't help. Go to:
for an excellent article (but poor pix) on Walbro carburetors, but related to most all 2-stroke carburetors. Hope this helps!

Posted on Feb 24, 2010

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-Remove Carb and clean, you have a high speed fuel port clogged.

This would also be a good time to replace your fuel lines, Take photos before you start.

-Drain all fuel from the Saws fuel tank.
-Remove and REPLACE with a NEW spark plug.
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