DCS6401 20 20″,64cc Chainsaw 2 Cycle

When pulling starter cord, good spark from plug. Put petrol down plug hole still won’t fire. Anyone got any ideas what the problem may be and hopefully a solution!!!
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I have a MS180C, and I had the same problem. I discovered that the saw is very tempermental with the amount of fuel in the tank. If you fill it even a bit over the fill line (in the horizontal position) the saw will not start. It will mean re-fueling more often, but you cannot fill the tank “full”, only to the line or below.

How to Identify and Fix Common Gardening Problems ?

We provide a variety of viewpoints on how to identify and fix common gardening problems. Our sources include academic articles, blog posts, and personal essays from experienced gardeners :

If your STIHL chainsaw is going to have a problem, it`s likely to be with a worn carburetor, bad spark plugs, loose fuel hoses, or clogged fuel lines. You should also inspect the fuel intake system and ensure that there are no compression issues.
If your electric chainsaw won`t start, try examining it for these issues: Not pressing the safety button at the same time as the trigger. Tripped electrical breaker (for corded chainsaws) Frayed or damaged electrical cord (for corded chainsaws)
If you notice the blade is not turning, check the belt. Start by removing both side covers – depending on your model, one cover may be the recoil. If the belt is broken, it needs to be replaced. From here, release the tension on the belt by turning the nut counter clockwise until it stops.
A dirty carburetor, bad gasoline and low-quality two-stroke oil that creates deposits all contribute to chainsaw starting problems.
One tell-tale sign that a chainsaw has flooded is the smell of fresh petrol near the muffler. To ascertain whether this is indeed the problem, simply disassemble the part, pull the starter cord as if you were switching on the engine, then dry it, reassemble it and try switching it on again.
Remove the spark plug and inspect if it is dirty, cracked, eroded, or damaged. There may also be a heavy carbon buildup or a burned-up electrode. If the spark plug has one or more of these issues, replace it with a new one.

Discover Relevant Questions and Answers for Your Specific Issue

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Makita chainsaw starts and revs then dies – Stihl Chain Saws, 017, 019, 021, 023 & 025
ANSWER : Check the fuel filter in the tank is clean it could be blocked

Ms170 stihl chainsaw wont start or if it does start it wont take the throttle
ANSWER : Try new gas, and adjust the carb.

What settings should i start off with on carb. @stihl 025
ANSWER : Screw the screw fully in but not tight then turn it out 3/4 of a turn

Saw will start but dies when rev – Stihl 16" Chainsaw Bar Chain Saw 018 025 Ms 180 250
ANSWER : Check the pick up fuel line in the gas tank. If there is a fuel filter at the end of the line,remove and clean or replace. Use a small fexible wire to hook line and pull out thru gas tank opening.

Starts up but in time it will not revup, it will drop off and will die
ANSWER : Check the air filter and if this does not solve the problem check the spark arrester screen in the muffler. Also check for a clogged fuel filter in the fuel tank.

While trying to start the saw the compression is so great that it is near imposible to pull the start rope ….ie won’t spin fast enough to start … new plug ,,,, new gas …..no start ,,,tired arm ,??????
ANSWER : Is there a compression release button?

I have stihl fs45 which have problem starting..has new sparkplug in it. Is the iginition coil could be a problem?
ANSWER : Yes it could be.You can purchase an inline ignition tester from your local parts store and test it. Its also possible the plug is fouled.

How to replace a oiler on a stihl chainsaw ? – Stihl Service Manual for 031AV Chainsaw with Parts List
ANSWER : Remove the worm, sealing ring and washer, loosen the pan head screws on the oil pump and replace. Check if the gasket is re-usable.