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Will not start the saw seems to have weak spark removed spark plug put gas on ctop of piston reinstalled does not start fire

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Magneto requires ajusting to top dead centre

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It is getting fuel but has a weak spark and will not start.

DO NOT , I repeat do not use starting fluid on a 2 stroke chainsaw or trimmer. you will score the cylinder or the piston. When trying to diagnose a hard to start motor just give it a small squirt of mix in the carburetor. If it won't fire you have a compression problem or an ignition problem. when you test for spark make sure you have a good plug, that is well grounded and not in bright sunlight which can make it hard to see the spark. if you have spark, do a compression test.

Mar 19, 2015 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Dolmar ps 34 or makita dcs34

Replace the spark plug and get some starter fluid. Add FRESH gas/oil mix. Spray a couple squirts in the spark plug hole, replace the spark plug and try to start it. I would add Sea Foam (get it at any parts store) to the gas tank and let it run for ten minutes. Go to the manufacturers website, support, and search for your saw by model/serial number.

Mar 15, 2014 | Garden

1 Answer

I cant get my chainsaw to start i have changed the spark plug new gas and oil cleaned internal and external very well but just wont start

If there is a good spark at the plug ( check this by resting the plug against the cylinder, away from the plug hole and crank the engine ) and there is signs of fuel at the plug after cranking the engine, then it may have picked up on the piston, remove the muffler and check the condition of the piston through the open exhaust port, any sign of scuffing on the piston skirt and it will have to come apart to assess the damage.

Nov 22, 2012 | Garden

1 Answer

Can't get it started after new spark plug (gets spark), new gas, good compression tried starting fluid. Whats the problem?

Quick way to check condition of the engine is to remove the muffler. Also make sure that the spark arrest screen is clean. With muffler off, examine the condition of the piston and cylinder. If the piston looks burned and cylinder is scratched, saw will be hard to start. The cylinder and piston should look very smooth. Secondary test to verify condition of engine is to spray plenty of wd40 in cylinder and around piston, then pull the starter slowly. If you see lots of bubbles as you pull, indicates compression is leaking and will be hard to start. If cylinder/piston are in good condition, use new spark plug and retest.

Oct 18, 2011 | Poulan Wild Thing 2375 18" Gas Chain Saw...

1 Answer

My saw is less then one year old. The saw will not start, it has a new spark plug fresh gas. The saw was running fine and just sputered and cut out.

You need four main things for the saw to start, good compression ( remove the muffler and check the condition of the piston through the open exhaust port, look for signs of scuffing on the piston skirt ), a spark at the plug ( remove the plug, place it ontop of the cylinder, or a good earth, crank the engine and check for a spark ), a spark at the correct time ( remove the flywheel and check the key has not sheared, check the air gap between the flywheel and the ignition unit, this should be 0.3mm ), fresh fuel at the plug ( when you remove the plug, is there signs of fuel on the plug electrode, if not there is a fuel blockage, check the fuel filter in the tank, check the fuel hoses for signs of leakage, or cracks )

Sep 17, 2011 | Poulan Pro 42CC 2 Cycle Chainsaw, 18"

1 Answer

Cannot get saw to start. Old gas removed, new gas added, and spark plug cleaned. It will pull, but will not pop.

If there is a good spark at the plug, and the plug gets wet with fuel, then it could be a damaged piston ( seized ) remove the muffler and check the condition of the piston through the exhaust port.

Jun 01, 2011 | Garden

1 Answer

My saw would not keep running when turned sideways, so i put a carb kit in it, now it will not start. The plug has alot of gas on it. the plug has a weak spark. Could the weak spark be the problem or too...

Check the fuel filter, air cleaner, and muffler for plugging. Poulan saws seem to have too much clearance between the ignition module and the flywheel magnets which causes weak spark. Remove the left side cover to expose the flywheel and ignition module. Turn the flywheel until the magnets are just under the module poles, insert a thin business card into the module gaps, loosen the module screws to allow the module to contact the magnets. Tighten the screws, and rotate the flywheel somewhat to remove the card. Rotate the flywheel one full turn to make sure the gaps don't close up at any point. Recheck for spark which should be blue and snappy (clean plug gapped at 0.020"). Try for start--if it is flooding the spark plug, retrace your repairs to the carburetor, especially the diaphragm in the lower chamber. Go to: for a 12 page article on Walbro brand carburetor theory and troubleshooting. This information applies to other brands as well in a general way. Hope this helps!

Nov 05, 2010 | Poulan Pro 16-Inch 38 cc Anti-Vibration...

1 Answer

Husqvarna 51 died and wont restart

if you have a good compression,a strong enough blue spark and carburetion for the fuel air mixture try priming the engine(put small amount of gas in the spark plug hole)then start the engine.If the engine runs only the gas you put inside the cilinder there is a carburetion problem to find and fix.
let me know regards savumihai71

Apr 13, 2010 | Husqvarna "Chain Saw - 16" Bar, 3 Hp

3 Answers

Partner K750 wont start

i have seen these saws split the diaphram in the carb, so get that carb out and take off the bottom 4 screws... also iv seen 1 with the igniter coil gone weak and only sparking the plug the odd time so make sure yu hav a good spark also...

Jun 06, 2009 | Husqvarna Saws

2 Answers


Generally, these saws are set at the factory and aren't supposed to be adjusted. If you can remember how far you turned each screw I would suggest you turn it back to where it was. Turning the screws clockwise leans out the mixture and although it would seem to make it run better warm, it is too lean to start properly. If the engine doesn't start at the factory setting you probably need to take the carb apart and clean it and put a new kit in it.

Oct 02, 2008 | Poulan Wild Thing 2375 18" Gas Chain Saw...

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