Saw starts and loses power and dies when i pull throttle

Check air filter- clean or replace, Make sure you have fresh fuel, A new spark while you are giving it a service, Do you know how to tune the saw? Start with basic settings 1 turn on the low and 1 turn on the high And adjust from there, You might have turned the idle up too high. The choke should always be fully in when saw is running. Hope this is a good start

This is classic fuel starvation, start by removing the fuel hose from the tank and replace the filter on the end, if no better, it may be a tank breather issue, when the saw starts to die slacken the fuel cap, if the saw picks up you need to replace the breather, if no better you can make a small adjustment to the H screw on the carb, unscrew ( counter clockwise ) the H screw this will richen the mixture, you will need to pull the anti tamper sleeves back on the screws, this can be done by gently screwing a suitable self tapping screw into the sleeve, when it hits the screw head under neath the sleeve will start to pull back, once pulled half way off you can enter a 2mm screw driver through the centre if the sleeve and intp the slot in the adjuster screw underneath.

The temperature is not that different. Is there a fair change in altitude between the dealer and where you live? The jet screws have 'D' heads to prevent owner tampering--how did you adjust them? You need to allow the engine to warm up before pulling the throttle. Make sure the fuel mix is fresh and mixed 50:1 with synthetic chain saw oil--be sure to shake the container thoroughly just before filling the tank each time to prevent oil starvation. It has to be the manufacturer's problem because it is under warranty. It sounds like the jet screws are set fairly lean. Ask the dealer if you can buy the special 'D' head screwdriver to make your own adjustments. Hope this helps!

If still under warranty have it serviced (authorized dealer not Joe's lawn mower). There should not be a fee (paid by Husqvarna). There have been carburetor problems. If you adjust it your warranty will likely be void; Joe's small engine service just as likely to void any warranty. Are you using a fresh 40:1 fuel oil mix. The will not start with choke set is normal. Start procedure in your OM says listen for sputter and disengage choke. Almost all new saws have similar start procedure.
Start Procedure
Cold:

1. Ignition on/off to on.
2. Set compression release – optional step even if saw is equipped with a compression release.
3. Pull (close) choke, set fast idle (done when choke closed on some saws); pull starter and listen for an attempt to start. once heard (usually two pulls; no more than 4).
4. Set compression release – optional step even if saw is equipped with a compression release.
5. Push (open) choke pull starter until it starts. (usually first pull).

Warm:

1. Ignition on/off to on.
2. Set compression release – optional step even if saw is equipped with a compression release.
3. Pull (close) choke, set fast idle (done when choke closed on some saws) – Do not pull with choke closed.
4. Push (open) choke, pull starter until it starts. (usually first pull).

If you have more questions or need additional help please reply below and I will get back to you. HTH & Good Luck.
Lou
Thank You for using FixYa.

Check the fuel lines for hardness, cracking, splitting, or end rot. Check the muffler for plugging. Check the carburetor fasteners for tightness. Are you using fresh fuel mix? If the carburetor jets have been adjusted, try turning both CW to stops (lightly) then back out each CCW 1-1/2 turns. Engine should start and run--allow to warm up. Pull the throttle full on, and adjust H needle CW until the engine starts to speed up, but still 4-strokes. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. Let idle and adjust L CW for fairly smooth running, but still allows the engine to 'follow the throttle'. Hope this helps!

Check the fuel filter, air cleaner and muffler for plugging. Was the carburetor disassembled when soaked and did you use compressed air to blow out all passages? If the carburetor jet screws have been moved, preset them as follows: Turn both H and L screws CW to stops (lightly), then back out CCW each screw 1-1/2 turns. Start the engine and allow to warm up. Pull the throttle full on and adjust H CW until the engine speeds up somewhat but 4-stroking. Proper adjustment is when the engine 4-strokes, but immediately 2-strokes when cutting. Allow to idle and adjust L CW until the engine runs fairly well, but still allows the engine to 'follow the throttle'. Adjust idle speed screw so that chain stops turning, but the engine continues to run. Hope this helps!

It sounds like it is flooding when you use the throttle, both are connected. Turn the idle back all the way until it dies, then try turning it a 1/4 turn the other direction.

You understand there is a fast idle start position? If your saw is new it is triggered when the choke is pulled and remians in this position (even when choke pushed in) until the throttle is advanced once. Read your warm start instructions, it says pull clutch, push clutch, start. This is why we should buy saws from a chainsaw seller/mechanic NOT Home Depot!!!
I made the mistake ONCE of attempting to start mine without the fast idle engaged... my shoulder aches just thinking about it. GL
Lou

Your carb may be the issue but your ignition coil could be the culprit. Once they start going bad, they can act up intermittently or give various symptoms from day to day. The fact that your saw dies at full load or under load, probably means that when your saw gets hot or requires more spark, your coil is not able to provide it. Your carb is easy enough to clean out, you can take it all apart and clean all screens, etc....

I just replaced my coil due to the exact same symptoms and now my saw runs great. $60 off ebay and you can put it on in 15 minutes yourself. Check your carb first though

Hi

When the engine get warm and die(I suppose)check the spark at the sparkplug.You can let the saw run until it ran out of gas and you will not distroy the engine.Change the sparkplug.

best regards savumihai71